2010 Edition | Introduction | Page I DOMESTIC & COMMERCIAL REQUIREMENTS FOR OIL STORAGE & SUPPLY EQUIPMENT Serving Fixed Combustion Appliances Foreword This publication is one in a suite of technical books provided by OFTEC to assist those involved in oil delivery, installation &/or maintenance of equipment to understand the practices, principles and safety requirements of their work. OFTEC technical books can also be used as reference material for designers and specifiers of oil equipment and support technicians during OFTEC training & assessment and assist them whilst out in the field. Oil storage and supply systems serving fixed combustion appliances are inherently safe when installed in accordance with industry codes of practice, manufacturer’s instructions and statutory requirements. This book contains guidance on means of achieving safe and compliant installation. The information contained within this publication has been drafted using generic practices that are generally applied throughout the UK and Republic of Ireland. However, in some regions more onerous legislative requirements apply and are summarised in Section 6. Scope OFTEC Technical Book 3 gives guidance on installation requirements for domestic and commercial oil storage and supply systems for liquid fuels to BS 2869 (Class C2 Kerosene and Class D Gas oil), bio liquids to EN 14214 and bio liquid/mineral fuel blends to OPS 24, serving fixed combustion appliances. This publication has been compiled into sections as follows. Section 1 – Domestic Oil Storage Oil storage systems of up to 3500 litres storage capacity, serving fixed combustion appliances that provide cooking, space heating and hot water supply services to buildings used primarily as dwellings. NOTE: A building used ‘primarily as a dwelling’ can be a residential property where a single family resides, but which may contain a home office or a micro business such as one offering beauty treatment or consultancy from a single room. For the purposes of this book, the text ‘single family dwelling’ has been used. Section 2 – Oil Supply Systems serving fixed combustion appliances up to 45kW output Equipment and techniques appropriate to provide a safe and adequate supply of fuel to fixed combustion equipment. AMD 03-1214-24
Transcript
2010 Edition | Introduction | Page I
DOMESTIC & COMMERCIAL REQUIREMENTS FOR OIL STORAGE & SUPPLY EQUIPMENT
Serving Fixed Combustion Appliances
Foreword This publication is one in a suite of technical books provided by OFTEC to assist those involved in oil delivery, installation &/or maintenance of equipment to understand the practices, principles and safety requirements of their work. OFTEC technical books can also be used as reference material for designers and specifiers of oil equipment and support technicians during OFTEC training & assessment and assist them whilst out in the field. Oil storage and supply systems serving fixed combustion appliances are inherently safe when installed in accordance with industry codes of practice, manufacturer’s instructions and statutory requirements. This book contains guidance on means of achieving safe and compliant installation. The information contained within this publication has been drafted using generic practices that are generally applied throughout the UK and Republic of Ireland. However, in some regions more onerous legislative requirements apply and are summarised in Section 6. Scope OFTEC Technical Book 3 gives guidance on installation requirements for domestic and commercial oil storage and supply systems for liquid fuels to BS 2869 (Class C2 Kerosene and Class D Gas oil), bio liquids to EN 14214 and bio liquid/mineral fuel blends to OPS 24, serving fixed combustion appliances. This publication has been compiled into sections as follows. Section 1 – Domestic Oil Storage Oil storage systems of up to 3500 litres storage capacity, serving fixed combustion appliances that provide cooking, space heating and hot water supply services to buildings used primarily as dwellings. NOTE: A building used ‘primarily as a dwelling’ can be a residential property where a
single family resides, but which may contain a home office or a micro business such as one offering beauty treatment or consultancy from a single room.
For the purposes of this book, the text ‘single family dwelling’ has been used.
Section 2 – Oil Supply Systems serving fixed combustion appliances up to 45kW
output Equipment and techniques appropriate to provide a safe and adequate supply of fuel to fixed combustion equipment.
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Section 3 – Non-Domestic Oil Storage Oil storage systems of up to 10,000 litres storage capacity serving fixed combustion appliances. (other than domestic oil storage systems of up to 3,500 litres). Section 4 – Oil Supply Systems serving fixed combustion equipment above 45kW
OFTEC The Oil Firing Technical Association (OFTEC) was formed in April 1991 with the aim of improving standards within the oil firing industry and to make available information, tools, equipment and products to enable all concerned to carry out their functions compliantly. The Members of the Association are made up of representatives from oil companies, oil distributors, manufacturers of equipment and training & assessment centres utilised by the oil firing industry in the United Kingdom, Channel Islands, Isle of Man and the Republic of Ireland. In addition to OFTEC’s activity as a trade association, OFTEC operates a ‘Competent Persons Register’. This allows technicians that undergo training and assessment in the installation of different heating technologies to apply for registration in order to self-certify their installation work, as required by some regional Building Regulations. OFTEC currently offers registration with regard to oil, heat pumps, solar thermal, unvented hot water, and electrical installation work. See www.oftec.org for further developments in the registration area. Through the OFTEC trade association, an important aspect of work is the testing, approval and certification of oil firing equipment. A scheme for this is operated under the name of OFCERTTM. OFCERTTM is an integral part of OFTEC’s mission to promote excellence in oil fired heating and cooking. Specifiers and users of OFCERTTM licensed oil firing equipment can be sure that it exceeds the latest standards of manufacturing and legislation. Equally, because OFCERTTM is the dedicated testing and certification scheme for oil firing equipment, it gives added prestige to the high standards of manufacture within the industry. OFTEC Member Independent Test Houses carry out testing to OFCERTTM requirements. Each Test House must have UKAS or ILAB approved test procedures and they are consulted with regard to the development of OFCERTTM Standards. Manufacturers can apply for OFCERTTM approval for their own test facilities as Auxiliary Test Facilities, providing they meet stringent criteria including UKAS or ILAB approval for their operations. Testing at Auxiliary Test Houses is usually required to be supervised by an appropriate Main Test House. Main Test Houses are first class independent or government laboratories. A full list of current test houses can be found in the OFTEC Equipment Directory/Specifiers Guide. The OFTEC Directory (Specifiers Guide) is a valuable resource for specifiers and users of oil firing equipment. Updated regularly, the Directory is available online and contains comprehensive details of oil firing and associated equipment. It also shows which products have obtained OFCERTTM licences, along with details of relevant European Standards and Directives. Copies of the relevant OFTEC Standards together with application forms are available to order from OFTEC. OFCERTTM licences are awarded to equipment that has satisfied the requirements of an OFTEC Standard and is produced to a Quality Assurance scheme incorporating that standard. The scheme is operated under the overall supervision of the OFCERTTM Scheme Committee. This is one of many OFTEC publications. For a complete listing please visit the publications section at www.oftec.org.
OFTEC STANDARDS OFS A100 Heating boilers with atomising burners, outputs <70kW and max operating
pressure of 3 bar. OFS A101 Oil fired cookers with atomising or vaporising burners with or without boilers,
outputs <45kW. OFS A102 Room heaters with atomising or vaporising burners with or without boilers,
outputs <25kW. OFS A103 Used lubricating oil burners for space and water heating appliances, outputs
<400kW. OFS T100 Polyethylene oil storage tanks for distillate fuels. OFS T200 Steel oil storage tanks and tank bunds for use with distillate fuels, lubrication oils
and waste oils. OFS E100 Oil Pressure atomising nozzles for use with kerosene. OFS E101 Remote acting fire safety valves for use with oil supply systems. OFS E103 Gauges for use with oil supply tanks. OFS E104 Filters and water separators for use with oil supply systems. OFS E105 Overfill alarms and overfill prevention devices for use with oil supply tanks. OFS E106 Flues for use with oil fired boilers with outputs <50kW. OPS 21 Fire protection screen walls for use with oil storage tanks – Minimum
requirements and testing. OPS 23 De-aerators – Minimum requirements and testing. prOPS 24 Bio-Liquids For Combustion Purposes. OPS 26 Guidance for the use of BS EN 13203-2: 2006 for liquid fuel fired combination
boilers up to 70kW rated input and with up to 100 litres hot water storage capacity.
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TECHNICAL UPDATES Due to developments in technology and changes in building regulations, OFTEC will from time to time issue updates to this publication to maintain its accuracy. OFTEC technicians can obtain updates as free of charge downloads from the OFTEC website www.oftec.org as a benefit of registration. Printed copies can be obtained from OFTEC on request and a charge may be levied for this service. So that latest information is held and can be referred to, it is recommended that registered technicians take advantage of free technical updates, which should be printed and inserted into this publication. The table below has been provided to record updates to this publication and may be viewed as part of an OFTEC inspection as evidence that a technician is aware of latest changes in industry. The first line of the table is completed as an example of the information required.
Update Reference Date of Update Page Reference
AMD 03-1210-01 20/12/2010 Section 5, Page 2
AMD 03-1210-02 20/12/2010 Section 5, Page 6
AMD 03-1210-03 20/12/2010 Section 6, Page 11
AMD 03-0411-04 20/04/2011 Section 6, Page 4
AMD 03-0411-05 20/04/2011 Section 6, Page 6
AMD 03-1011-06 19/10/2011 Section 1, Pages 56 to 67
AMD 03-0413-07 25/03/2013 Section 2, Pages 1 to 2
AMD 03-0413-08 25/03/2013 Section 2, Page 18
AMD 03-0413-09 25/03/2013 Section 3, Pages 10 to 12
AMD 03-0413-10 25/03/2013 Section 3, Page 24
AMD 03-0413-11 25/03/2013 Section 3, Pages 28 to 35
AMD 03-0413-12 25/03/2013 Section 4, Page 2 and Pages 4 to 6
AMD 03-0413-13 25/03/2013 Section 5, Pages 12 to 15, 18 to 19 and 21 to 25
AMD 03-0413-14 25/03/2013 Contents, Pages XI to XV
AMD 03-0613-15 24/06/2013 Section 3, Page 4
AMD 03-0913-16 16/09/2013 Section 1, Pages 27 to 28
AMD 03-0913-17 16/09/2013 Section 6, Page 7
AMD 03-0913-18 16/09/2013 Contents, Pages XIII to XIV
AMD 03-0614-19 16/06/2014 Section 5, Pages 24 to 25
AMD 03-0614-20 16/06/2014 Section 6, Page 14
AMD 03-0614-21 16/06/2014 Contents, Page XII
AMD 03-0814-22 22/08/2014 Section 6, Page 13
AMD 03-0814-23 22/08/2014 Contents, Pages XI to XIV
AMD 03-1214-24 12/01/2015 Various (BS 5410-1 Update)
AMD 03-1214-25 12/01/2015 Section 6, Pages 17 to 18
1.7.6 Oil Storage Tank Bases ...................................................................................... 37 1.7.7 Ground Types for Oil Storage Tanks ................................................................... 38 1.7.8 General Site Layout of an Oil Storage Tank Base ............................................... 40
1.8 Plastic Oil Storage Tank Bases ............................................................................... 41
1.8.1 Plastic Oil Storage Tank on a Concrete Base ...................................................... 41 1.8.2 Plastic Oil Storage Tank on Pre-cast Lintels........................................................ 42 1.8.3 Plastic Oil Storage Tank on Paving Slabs ........................................................... 43 1.8.4 Plastic Oil Storage Tank on Platform with Concrete Base ................................... 44 1.8.5 Plastic Oil Storage Tank on Platform with Lintel Base ......................................... 46
1.9 Steel Oil Storage Tank Bases .................................................................................. 48
1.9.1 Steel Oil Storage Tanks with Integral Base Supports .......................................... 48 1.9.2 Steel Oil Storage Tank on Piers with Concrete Base ........................................... 48 1.9.3 Steel Oil Storage Tank with Lintel Base .............................................................. 50
1.10 Internal Oil Storage Tank Installation ..................................................................... 50
1.10.1 General ............................................................................................................... 52 1.10.2 Fire Protection ..................................................................................................... 52 1.10.3 Bunding ............................................................................................................... 52 1.10.4 Ventilation ........................................................................................................... 53 1.10.5 Maintenance ....................................................................................................... 53 1.10.6 Filling and Venting............................................................................................... 53
1.11 Extended Fill Pipes .................................................................................................. 54
1.11.1 Above Ground Extended Fill Line Installation ...................................................... 54 1.11.2 Extended Fill Line Installation in a Building ......................................................... 54 1.11.3 Underground Extended Fill Line .......................................................................... 54 1.11.4 Multiple Installations ............................................................................................ 55 1.11.5 Testing ................................................................................................................ 55
2.3.1 Bottom Outlet Tanks ........................................................................................... 29 2.3.2 Gravity Fuel Supply Methods .............................................................................. 29 2.3.3 Maximum Head Pressure .................................................................................... 29 2.3.4 Minimum Head Pressure ..................................................................................... 31 2.3.5 Multiple Appliance Installations ........................................................................... 31 2.3.6 Multiple Oil Storage Tank Installations ................................................................ 31
2.4 Fire Valve Installation .............................................................................................. 34
2.4.1 Fire Valves .......................................................................................................... 34 2.4.2 Standard External Fire Valve Positioning ............................................................ 35 2.4.3 External (Internal) Fire Valve Positioning ............................................................ 36 2.4.4 Fire Valve Positioning for an External Boiler........................................................ 37 2.4.5 Fire Valve Positioning for a Vaporising Range Cooker ........................................ 38 2.4.6 Fire Valve Positioning for a Vaporising Roomheater (Stove) ............................... 39 2.4.7 Fire Valve Positioning for Oil Lifters .................................................................... 40
SECTION 3 NON-DOMESTIC OIL STORAGE
3.1 Oil Storage Tank Types ............................................................................................. 1
6.9 Isle of Man ................................................................................................................ 17
6.9.1 The Building Regulations 2014............................................................................ 17 6.9.2 Statutory Documents ........................................................................................... 17 6.9.3 Work Notification ................................................................................................. 18 6.9.4 Oil Storage Tank Installation ............................................................................... 18 6.9.5 Contact Details .................................................................................................... 18
SECTION 7 ACKNOWLEDGEMENTS SECTION 8 BLANK PAGES
SECTION 1 DIAGRAMS AND TABLES Diagram 1a Oil Storage Tank Fittings ............................................................................... 8 Diagram 1b Steel Fabricated Puddle Flange .................................................................... 9 Diagram 2a Steel Oil Storage Tank within a Masonry Bund ............................................. 14 Diagram 2b An example of an Integrally Bunded Steel Oil Storage Tank ........................ 15 Diagram 2c An example of a Top Outlet Integrally Bunded Plastic Oil Storage Tank ...... 16 Diagram 3 Oil Storage Tank near Non Fire Rated Buildings and Boundaries ................ 20 Diagram 3b Oil Storage Tank near Non Fire Rated Buildings and Boundaries ................ 21 Diagram 4 Oil Storage Tank near Fire Rated Buildings and Boundaries ....................... 22 Diagram 5a Oil Storage Tank near Fire Rated Buildings and Boundaries ....................... 23 Diagram 5b Oil Storage Tank near Fire Boundaries........................................................... 24 Diagram 5c Oil Storage Tank near Fire Rated Buildings.................................................... 24 Diagram 6a Oil Storage Tank near Fire Rated Buildings and Boundaries ....................... 25 Diagram 6b Oil Storage Tank near Fire Rated Buildings .................................................. 26 Diagram 7 Oil Storage Tank Installation near Eaves (without Fire Protection) ............... 27 Diagram 8a Oil Storage Tank Installation near Eaves (with Fire Protection) .................... 27 Diagram 8b Oil Storage Tank Installation near Eaves (with Fire Protection) .................... 28 Diagram 9 Tank Strapping .............................................................................................. 31 Diagram 10 Flood Protection ............................................................................................ 31 Diagram 11 Plastic Oil Storage Tank on Raised Platform to enable Filter Access ........... 35 Diagram 12 General Site Layout of an Oil Storage Tank Base ........................................ 40 Diagram 13 Plastic Oil Storage Tank on a Concrete Base ............................................... 41 Diagram 14 Plastic Oil Storage Tank on Pre-cast Lintels ................................................. 42 Diagram 15 Plastic Oil Storage Tank on Paving Slabs ..................................................... 43 Diagram 16 Plastic Oil Storage Tank on Platform with Concrete Base ............................ 45 Diagram 17 Plastic Oil Storage Tank on Platform with Lintel Base .................................. 47 Diagram 18 Steel Oil Storage Tank on Piers with Concrete Base .................................... 49 Diagram 19 Steel Oil Storage Tank on Piers with Lintel Base .......................................... 51 Diagram 20 Internal Oil Tank within Tank Chamber ......................................................... 53 Table 1 Typical Domestic Construction Types – Fire Ratings of Structures .............. 29
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Table 2 Weight of Contained Fuel .............................................................................. 37 Table 3 Heel Test for Paving Slab Bases ................................................................... 39 Table 4 Heel Test for Cast Concrete Bases ............................................................... 39 Table 5 Heel Test for Pre-cast Lintel Bases ............................................................... 39 SECTION 2 DIAGRAMS AND TABLES Diagram 21 Use of Approved Plastic Pipe ........................................................................ 3 Diagram 22 Section through a Pipe Duct ......................................................................... 4 Diagram 23 Section through a Pipe Trench ...................................................................... 6 Diagram 24 Access to an Underground Joint ................................................................... 6 Diagram 25 Oil Supply Pipe Passing through the Wall of a Building ................................ 8 Diagram 26 External Wall Box Assembly ......................................................................... 14 Diagram 27 External De-aerator ....................................................................................... 15 Diagram 28 External De-aerator in a Wall Box ……………………………………………… 15 Diagram 29 Internal De-aerator ……………………………………………………………….. 16 Diagram 30 Internal De-aerator in a Wall Box ………………………………………………. 16 Diagram 31 De-aerator Devices in Proximity to a Flue Terminal ...................................... 17 Diagram 32 Single Oil Supply Pipe Suction System with External De-aerator ................. 21 Diagram 33 Single Oil Supply Pipe Suction System with Internal De-aerator ................... 22 Diagram 34 Single Oil Supply Pipe System with Oil Lifter .................................................. 23 Diagram 35 Suction Pipe Sizing for Appliance up to 30kW Output (Worked Example 1) 26 Diagram 36 Suction Pipe Sizing for Appliance up to 30kW Output (Worked Example 2) 26 Diagram 37 Multiple De-aerator Installations .................................................................... 27 Diagram 38 Anti Syphon Valves ....................................................................................... 28 Diagram 39a Pressure Reducing Valve .............................................................................. 29 Diagram 39b Pressure Regulating Valve ............................................................................ 30 Diagram 40 Gravity Supply System Layout ...................................................................... 30 Diagram 41 Manifold ......................................................................................................... 32 Diagram 42 Multiple Oil Storage Tank Installation ............................................................ 33 Diagram 43 Standard External Fire Valve Positioning ...................................................... 35 Diagram 44 Existing (Internal) Fire Valve Positioning ...................................................... 36 Diagram 45 Fire Valve Positioning for an External Boiler ................................................. 37 Diagram 46 Fire Valve Positioning for a Vaporising Range Cooker ................................. 38 Diagram 46b Fire Valve Positioning for a Vaporising Range Cooker with Oil Lifter ………. 38 Diagram 47 Fire Valve Positioning for a Vaporising Roomheater (Stove) ........................ 39 Diagram 48 Fire Valve Positioning for Oil Lifters .............................................................. 40 SECTION 3 DIAGRAMS AND TABLES Diagram 49 External Non Domestic Oil Storage Tanks under 3500L ............................... 13 Diagram 50 External Non Domestic Oil Storage Tanks under 3500L ............................... 14 Diagram 51 External Non Domestic Oil Storage Tanks above 3500L .............................. 16 Diagram 52 External Non Domestic Oil Storage Tanks above 3500L .............................. 17 Diagram 53 Impact Protection using Steel Crash Barriers ............................................... 26 Diagram 54 Impact Protection using Steel Crash Barriers (Side View) ............................ 26 Diagram 55 Impact Protection using Bollards ................................................................... 27 Table 6 Typical Non Domestic Construction Types – Fire Ratings of Structures ....... 19 Table 7 Fire Resistance Rating of Insulating Composite Panels ................................ 21
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SECTION 4 DIAGRAMS AND TABLES Diagram 56a Gravity Oil Supply System ............................................................................. 2 Diagram 56b Gravity Supply to a Daily Service Tank (via a Transfer Pump) ..................... 3 Diagram 57 Sub-Gravity (Suction) Oil Supply to a Daily Serv. Tank (via a Transfer Pump) 5 Diagram 58 Gravity Feed Low Pressure Ring Main .......................................................... 6 Diagram 59 Sub-Gravity (Suction) Low Pressure Ring Main ............................................ 7 Diagram 60a Suction Pipe Sizing for Appliances over 30kW Output using a De-aerator System (Worked Example 1) .................... 10 Diagram 60b Suction Pipe Capacity Chart – Kerosene ...................................................... 11 Diagram 61a Suction Pipe Sizing for Appliances over 30kW Output using a De-aerator System (Worked Example 2) .................... 12 Diagram 61b Suction Pipe Capacity Chart – Gas Oil ......................................................... 13 Diagram 62 Dead-Weight Fusible Link Fire Valve System..................................................16 SECTION 5 DIAGRAMS AND TABLES Diagram 63 OFTEC Oil Warning Sticker .......................................................................... 4 Diagram 64 CD/10 Form ................................................................................................... 6 Diagram 65 CD/10T Form ................................................................................................. 10 Diagram 66 CD/14 Form ................................................................................................... 12 Diagram 67a TI/133D Form ................................................................................................ 15 Diagram 67b TI/133ND Form .............................................................................................. 19 Diagram 68 Building Regulations Work Notification Fax .................................................. 23
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DOMESTIC OIL STORAGE
1.1 Oil Storage Tank Types
Oil storage equipment should be selected to provide a 20 year life when correctly installed, used, and maintained.
1.1.1 Steel Oil Storage Tanks
Most domestic steel oil storage tanks are of rectangular shape with a tented top and are constructed of mild steel with internal bracing. They have a BSPP screwed connection fitting for the attachment of the delivery tanker hose and a separate vent fitting with a cross sectional area as per BS 799 Part 5. These should have at least the same cross sectional area as the fill point. These are usually at the opposite end of the tank from the fill equipment.
A vent pipe is always provided, the size of which is important to prevent over pressurisation of the tank. In many single skin tanks, a draw-off pipe is provided at the lower part of one end and a drain-off cock at the other end. Draw off facilities can be provided in the top of the tank as is common on integrally bunded tanks.
Steel oil storage tanks should be constructed and certified to comply with OFS T200 and should be covered by an OFCERTTM License. Galvanised steel tanks must never be used for oil storage.
1.1.2 Polyethylene Oil Storage Tanks
Oil should never be stored in translucent plastic containers due to the detrimental effects of ultraviolet light on both the plastic and the contained fuel.
Purpose made oil storage tanks made from plastic materials have fill and draw-off fittings similar to steel tanks. A vent pipe is always provided to prevent over pressurisation of the tank during filling. Water/sludge and other debris can be extracted from the tank by inserting a suction pipe into the top of the tank.
Plastic oil storage tanks do not require painting, so tanks are often installed on a flat base at ground level providing there is adequate clearance under the fuel supply pipe to access and maintain oil filter(s).
Plastic oil storage tanks should be constructed and certified to comply with OFS T100 and should be covered by an OFCERTTM Licence. Tanks used for the storage of heating oil should also display a ‘CE Mark’ in compliance with the Construction Products Regulations.
Where an extended fill/remote vent system is to be installed, advice should be taken from the tank manufacture to ascertain any limitations associated with the design of the tank.
1.1.3 Single Skin Oil Storage Tanks
A single skin oil storage tank is fabricated from one layer of steel or plastic and should only be considered for installation where it can be proven that there is no risk of environmental damage in the event of an oil spillage. Where a risk of environmental damage exists a single skin tank can be positioned within a secondary containment area (Bund) that offers a containment capacity of not less than 110% of the capacity of the tank. It is to be noted that open bunds require periodic maintenance to remove potentially contaminated rain water and regional legislation may prohibit their use in some areas.
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1.4.3 Plastic Oil Storage Tank Inspection
Plastic oil storage tanks are available in many sizes and shapes. They can also be quite complex in their design, incorporating profiling and strengthening webs. When inspecting plastic tanks, particular attention should be paid to horizontal and vertical lines and intersecting profiles for signs of cracks, bulging, discolouration and for the occurrence of a white ‘chalk like’ appearance. Oil tanks that are cracked or are bulging are at risk of catastrophic failure and should be replaced immediately The following photographs illustrate plastic oil storage tanks in generally poor condition.
Bulging and leakage along a seam
Bulging and leakage apparent on removal of foliage and trellis
Inadequately supported plastic oil tank. NOTE: Resultant bulging to the base
Stress cracks can occur on the underside of profiling, which may not be
immediately apparent.
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1.5 Environmental Protection
1.5.1 Environmental Protection
BS 5410 Part 1 requires all new and replacement oil storage tanks to be provided with a secondary containment system as a means of reducing the risk of oil escaping to the environment should a primary tank leak or be over filled. Whilst some regional Building Regulations do permit a risk assessment to be undertaken to determine the risk of a pollution incident occurring in the absence of secondary containment, the omission of secondary containment is not recommended. Where a site pollution risk assessment is to be undertaken, OFTEC form TI/133D should be used to highlight and record risks. Where risks are identified, secondary containment must be provided. For further information regarding completing an OFTEC TI/133D form, please refer to the OFTEC Procedures section in this publication. NOTE: Secondary containment must be provided with all oil storage installations on
Jersey, Guernsey and Isle of Man.
See Regional Requirements at the back of this publication. Secondary containment can be provided either by using an integrally bunded oil storage tank (See Diagram 2b and 2c), or by building a concrete or masonry bund to CIRIA Report 163 to house a single skin oil storage tank (See Diagram 2a). For domestic oil storage tanks above 3500 litres the requirements of regional Control of Pollution regulations apply. See regional requirements and Section 3 of this publication for further information.
1.5.2 Secondary Containment
Secondary containments (or bunds) are secondary containment systems within which the primary tank sits. For a single tank the bund capacity should be able to hold 110% of the tank’s contents if oil is lost or spills from the tank. Where multiple tanks are contained within one secondary containment system, this should be sized to 110% of the largest tank’s maximum capacity, or 25% of the total maximum storage capacity of all the tanks, whichever is the greatest. See section 1.5.4 & 1.6.8 for further information on multiple oil storage tank installation. Secondary containment can be provided by the use of either an integrally bunded steel or plastic oil storage tank or by the provision of a concrete or masonry bund. Any valves, filters, sight gauges, vent pipes or similar equipment that are ancillary to the tank must be located within the bund. NOTE: An isolating valve or filter (installed in an oil supply feed pipe run to an appliance
from integrally bunded tanks) is not classed as being ancillary to the tank and are therefore permitted to be installed outside the bund.
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An example of a Top Outlet Integrally Bunded Plastic Oil Storage Tank to OFS T100
Diagram 2c
* Overfill prevention devices can either be Type A or B to BS EN 13616.
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1.5.3 Masonry and Concrete Bunds
Masonry and concrete bunds should be constructed to comply with the guidance given in CIRIA Report 163, Construction of Bunds for Oil Storage Tanks. For information on sealants for oil retaining surfaces inside bunds, contact OFTEC for an up-to-date list of manufacturers. There should be no drain-off cocks or openings of any type in the bund wall other than to permit a fixed fuel draw-off pipe to pass through to a fixed appliance (boiler, cooker, air heater etc). The floor of the bund should slope down to a point which any contents can be pumped out. Any water in the bund should be pumped out and disposed of safely. Copies of CIRIA Report 163 can be obtained from CIRIA (The Construction Industry Research and Information Association) who can be contacted at www.ciria.org. Summary sheets of CIRIA Report 163 can be obtained from Regional Environmental Authorities.
1.5.4 Multiple Oil Storage Tank Installations
Some domestic sites may require more than one tank for the storage of different fuels. E.g. Class D gas oil for the boiler and Class C2 kerosene for a cooker or stove. In such installations, each tank should have its own fill connection, which should be labelled with the class of fuel, a contents gauge, isolation valve, and overfill prevention device or overfill alarm. Where tanks contain the same fuel and are inter-connected, each tank should be positioned at an identical height and non-return valve(s) should be provided to prevent fuel flow from one tank to another (see sub-section 2.3.6 and diagram 42). In new installations, tanks should be separated by a minimum of 600mm to provide access for inspection, maintenance, or replacement. If it is found that inter-connected tanks do not have non-return valves fitted the capacity of each tank should be added together and treated as if the installation is one tank. Where this combined capacity exceeds 3500 litres the installation should be treated as non-domestic (see Section 3 of this publication). NOTE: Where multiple tanks are installed in a communal area serving different
dwellings, the installation is to be considered as non-domestic (see Section 3 of this publication).
Generally, domestic oil installations should not need planning permission. However, under the Town and Country Planning Act, for England, Wales and Scotland, restrictions can be imposed on an installation in situations where: the oil storage facility exceeds 3500 litres, an underground tank is specified, a tank is to be positioned forward of the principal elevation fronting a highway, work is performed in a conservation area or on listed properties, flues terminate on the front projection of a property, etc.
Obtaining planning permission is the legal responsibility of the homeowner. However, to prevent dispute at the latter stages of a contract, if you think that planning might be required for specific work it is worth suggesting to your customer that they should seek clarification from their local planning office.
1.6.2 External Oil Storage Tank Location
Oil storage tanks should be located in the most unobtrusive position possible having first borne in mind the needs of safety, filling, maintenance and the need, if any, to provide a head of oil for the burner. The fire protection methods as detailed in this section are based on the requirements of BS 5410: Part 1, but there may be regional variations, please check with the requirements in the back of this publication for any regional variations. If oil storage tanks are to be installed in areas where there is a high risk of flooding (or exposure to high winds), consideration should be given to the provision of strapping to prevent floatation. A direct result of flotation or the uncontrolled movement of an oil storage tank is damage to the oil supply pipe, which could lead to a loss of fuel and a pollution incident caused.
1.6.3 Liquid Petroleum Gas (LPG)
When specifying a suitable location to accommodate an oil storage tank, consideration should be given to the tanks siting in relation to nearby LPG storage facilities. Reference should be made to UKLPG Association publication “User Information Sheet 010 – Separation distances between LPG cylinders and Tanks and domestic oil storage tanks”. UKLPG Association “User Information Sheet 010” can be accessed via the OFTEC website www.oftec.org
1.6.4 Fire Protection
The storage of kerosene and gasoil in its liquid state is considered safe providing that the tank and its contents are protected from the effects of fire or a heat source that originates nearby. The fire protection of oil storage tanks is required by Building Regulations. Compliance can be met by either providing separation to features about a property of by using a physical barrier.
For single family dwellings where oil storage is external and does not exceed 3500 litres, the following separation distances apply:
Any part of the tank to openings in an otherwise fire rated (minimum 30 minutes) wall of the building
Not less than 1.8m
Any part of the tank to combustible eaves Not less than 1.8m
Any part of the tank to a non-fire rated boundary Not less than 760mm
A non-fire rated boundary is defined as being: 1. A boundary marked by a non-fire rated fence, wall or hedge of vegetation. 2. A boundary marked by a solid, continuous, fire rated fence or wall which does not
extend at least 300mm longer than the oil storage tank at each end and 300mm higher than the oil storage tank.
3. A boundary which does not incorporate a fence or wall, or is not solid and continuous,
and is wholly or in part open to the neighbouring property. NOTE: Any screening not forming part of a boundary, including plants and foliage
used to conceal the tank from view should be kept at least 600mm away from the tank.
Where tanks cannot be protected by separation a means of fire protection must be provided. Examples are shown in diagrams 3a to 8. Tank bases are also considered to be a fire protection measure so as to prevent the spread of fire beneath a tank and to help reduce foliage taking over an installation if not regularly maintained. Any additional special Local Authority or fire protection requirements must also be complied with. An assessment can be recorded of fire protection requirements for an installation by completion of section 3 of form TI/133D (see section 5 of this publication). For guidance on fire ratings of domestic structures see sub-section 1.6.5. It is important to note that in some regions a “building” is defined as a dwelling but importantly in terms of fire protection to be affined to stored fuel, fire protection is to be provided in relation to “buildings” and “structures” Fire risk “structures” which may not always be defined as a “building” include garages, garden sheds, out buildings, mobile homes, static caravans, etc. Recorded incidents of fire spreading to domestic oil storage tanks predominantly originate from garden sheds, out buildings and garages where fire protection measures have not been applied.
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NOTE 7: (continued)
The non-combustible building wall and the barrier must protect the oil storage tank from fire coming through the opening.
OFTEC recommends that a clearance of at least 100mm should be left between a plastic oil storage tank and any adjacent structure so as to allow for flexing and visual inspection, but reference should be made to the oil storage tank manufacturer as they may specify a greater distance.
Oil Storage Tank near Fire Rated Buildings (Building wall with openings, within 1.8m of the tank, fire protection required)
Diagram 6b
Fire barrier
Oil Storage Tank
300
mm
300
mm
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Oil Storage Tank Installation near Eaves (Without fire protection)
Diagram 7
Minimum
1.8 metres
Non-Fire Rated Eaves
Oil Tank
Oil Storage Tank Installation near Eaves (With fire protection)
Diagram 8a
Less than
1.8 metres
Non-Fire Rated
Eaves
Oil Tank
300mm300mm
Fire Protection
Cladding (Note 8)
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1.6.8 Multiple Oil Storage Tank Installations
Some domestic sites may require more than one tank for the storage of different fuels. E.g. Class D gas oil for the boiler and Class C2 kerosene for a cooker or stove. In addition to the previous requirements in sub-section 1.5 the following fire protection recommendations should be followed: Where the capacity of individual oil storage tanks on the same site do not exceed 3500 litres and are located not less than 1.8m from any other tank, no additional fire protection requirements are required other than as detailed in 2.4.2. If due to site limitations, tanks not exceeding 3500 litres are located less than 1.8m away from each other, then one of the following three options should be adopted:
Establish the combined capacity of the installation by adding together the capacity of all tanks located within 1.8m of each other and treat the installation for fire protection purposes as if it was one large tank with an equivalent capacity. Where the combined capacity of the installation does not exceed 3500 litres, no additional fire protection requirements are required other than as detailed in 2.4.2
OR
Where the combined capacity of the installation exceeds 3500 litres, provide a fire rated barrier with a minimum fire rating of 30 minutes between the tanks, which extends 300mm higher than the highest oil storage tank and 300mm beyond both ends of the longest oil storage tank. This will allow each tank to be sited as close as 100mm from the fire rated barrier or as required by the tank manufacturer.
OR
Where the combined storage capacity exceeds 3500 litres, the installation should be considered to be non-domestic and the recommendations in Section 3 of this publication should be followed.
NOTE 1: Where the oil storage supply systems are connected together (conjoined) a
non-return valve should be fitted at each oil storage tank to prevent fuel flow between oil storage tanks.
NOTE 2: Where multiple tanks are installed in a communal area serving different
dwellings, the installation is to be considered as non-domestic (see Section 3 of this publication).
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1.7 Oil Storage Tank Installation
1.7.1 Steel Oil Storage Tanks
Bottom outlet domestic steel oil storage tanks are normally supported on piers where a gravity supply is required. The piers have to maintain the tank at a sufficient height to feed the burner and to enable access to be gained for maintenance.
Piers should be built upon a concrete base that extends at least 300mm around the perimeter of the tank. The base should be of adequate strength to suit the nature of the ground. The piers should be run across the shortest base dimension of the oil storage tank.
Steel oil storage tanks of the integrally bunded type (see diagram 2b) should be stood on a firm level non-combustible base, which should extend at least 300mm around the perimeter of the tank.
Steel oil storage tanks require painting to prevent rusting, and access should ideally be left around, above and beneath them to enable maintenance to the painted surfaces to be carried out. A clearance of at least 100mm is required for visual inspection. Steel oil storage tanks should be cleaned and given two coats of non-oil soluble paint before being installed. After installation, any damage to painted surfaces must be made good.
The need to provide suitable bases and supports for domestic oil storage tanks is of paramount importance for reasons of both safety and environmental protection. For detailed guidance see sub-section 1.9 on steel oil tank base design and construction.
1.7.2 Plastic Oil Storage Tanks
Plastic oil storage tanks should be stood on a firm level non-combustible base, which can be constructed as either a concrete slab of at least 100mm thickness or by laying paving slabs (minimum 50mm) on a compact and blinded hardcore base. It must be borne in mind that the light weight of plastic oil storage tanks, although of considerable advantage during installation work, does raise a possible hazard if wind pressure can move the tank when it is nearly empty. Restraining straps should be used where plastic oil storage tanks are installed in exposed conditions (e.g. high winds) or in areas liable to flooding to prevent flotation (see diagram 9 and 10). OFTEC recommend that a clearance of at least 100mm should be left between a plastic oil storage tank and any adjacent structure, so as to allow for flexing and visual inspection, but reference should be made to the oil storage tank manufacturer as they may specify a greater distance.
Plastic oil storage tanks can be installed at ground level, unless height has to be maintained above the oil burner or for maintenance access purposes. If plastic oil storage tanks are installed on piers, the manufacturer’s instructions should be checked to ensure that they are suitable to be supported in that way. For most plastic oil storage tanks, it would be necessary to provide a load-bearing platform on top of the piers to fully support the whole of the bottom of the oil storage tank. The need to provide suitable bases and supports for domestic oil storage tanks is of paramount importance for reasons of both safety and environmental protection.
Maintenance of the filter must be factored in when the height and design of the oil storage tank base are being considered. For detailed guidance see sub-section 1.7.5 height considerations on oil tank base design and construction.
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Appliance manufacturers will also specify a maximum acceptable head from gravity supply systems of oil above the burner level. This must be measured from the top of the tank. Top outlet oil storage tanks require mechanical suction to raise the fuel out of the tank. The use of anti syphon valves and manipulative fittings are referred to in this publication. Although unfamiliar to some, these items can have a vitally important part to play in the design, function and safe operation of oil supply systems. Wherever suction is provided, all manufacturers data must be cross referenced to accommodate the requirements of the plant and equipment concerned. It is not always practicable to fit a top outlet tank so we offer the following essential guidance. Top outlet tanks can and should be used for complete new oil installations which include pressure jet appliances. This could be where oil is replacing electric, LPG or solid fuel systems. Because the installation is completely new, it allows the system to be properly designed and sized, with the option to incorporate a de-aeration device to accomplish the necessary suction to draw oil from the tank. Traditionally, most oil storage tanks had a bottom outlet, and were installed on raised piers to facilitate gravity feed to the appliance. Steel integrally bunded tanks are normally elevated on integral bearers (see diagram 2b) With a bottom outlet oil storage tank, oil is usually fed to the appliance using the positive head of gravity created by the installed height of the tank. Therefore, if there was a leak in the oil supply pipe, it could drain the whole tank. Not all oil storage tank replacement situations allow for the use of top outlet oil storage tanks and a bottom outlet oil storage tank relying on gravity feed may be more suitable, such conditions would be where;
The existing oil pipe is not the correct size for suction purposes and is not being replaced.
The age or design of the existing appliance prohibits conversion to a suction pipe system with de-aerator.
It is not practical to fit an oil lifter.
It is not possible or practical to completely re-pipe an existing oil supply system between the tank and the appliance.
With top outlet tanks, oil can be drawn to the appliance by a fuel pump via a de-aeration device, which means the supply can only work using the negative pressure of suction. By fitting an anti syphon valve, if for any reason the oil pipe ruptures, the syphonic effect of suction is stopped preventing the oil being syphoned from the tank. For oil storage tank replacements a top outlet tank may be used where there is also the opportunity to replace the oil supply pipe to an existing pressure jet appliance. Re-using the existing gravity feed supply pipe will usually cause problems, as the size of oil supply pipe needed for a suction system is in the majority of cases smaller than that required for gravity feed. Top outlet tanks with suction feed are normally placed on a base at ground level, rather then being raised on piers, which is safer, more environmentally friendly and more aesthetically pleasing for the client/householder. When a de-aerator is fitted it requires that the pump of a pressure jet burner is suitable for, or can be converted to, two pipe operation. For appliances with vaporising burners or situations where the existing appliance/system prohibits conversion to a two pipe system with de-aerator, it is possible to convert to a suction pipe system using an oil lifter that provides a gravity supply to the appliance.
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1.7.6 Oil Storage Tank Bases
The need to provide suitable bases and supports for oil storage tanks both of steel and plastic construction is of paramount importance for reasons of both safety and environmental protection. If an oil storage tank is inadequately supported the oil storage tank itself can be weakened leading to the eventual failure of the oil storage tank and escape of the stored fuel. The homeowner, end user, fuel delivery driver, tank installer and the servicing and commissioning technician can all be at risk from an inadequately supported oil storage tank. An inadequately supported filled oil storage tank (especially when raised above ground) poses a very serious safety hazard and threat of injury as a result of a collapse.
Weight of Contained Fuel
Table 2
Tank Capacity Weight of Oil in Tank
Plus total weight of tank and fittings
1000 L 790kg
1500 L 1185kg
2000 L 1580kg
2500 L 1975kg
3000 L 2367kg
3500 L 2765kg
Based on C2 Kerosene @ 0.79kg/litre
The fire protection provided by the base, is to help prevent the installation itself from becoming overgrown and to help protect against fire spreading across the ground to the stored fuel, from another source. Suitable oil tank base construction materials, as listed in BS 5410 Part 1 include concrete of at least 100mm thickness, paving stones of at least 50mm thickness or stonework of at least 50mm thickness. Materials must be laid to provide an imperforate base. The overall size of the base should be larger than the oil storage tank and any integral oil storage tank bund, so that when the oil storage tank is installed, the base has a clear projection of a minimum of 300mm around all sides of the oil storage tank. When dealing with plastic oil tanks, it should be noted that some designs of tanks are ‘barrel shaped’ or wider half way up the sides of the tank than the bottom of the tank in contact with the base. Base dimensions are always calculated using the tank maximum dimensions as follows: Maximum tank length 1450 Maximum tank width 550mm Minimum base length 1450 + 300 + 300 = 2050mm Minimum base width 550 + 300 + 300 = 1150mm
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On exposed sites, and in particular when the tank is on piers, it is recommended to provide strapping (see diagram 9) to give stability for when the tank contains small quantities of fuel. If an oil storage tank moves because it is inadequately supported, it can lead to leakage of fuel from connection joints at the oil storage tank and in the supply pipe itself. To protect the environment oil storage systems must be installed with due reference to the oil storage tank manufacturers installation instructions and suitably protected from any potential mechanical damage. Oil storage tank bases and supports need to be designed and constructed to last 20 years. During this period of time the ground conditions can and do change. Trees which once removed moisture from surrounding ground may be cut down or fast growing Leylandii may be planted where there was none and may surprisingly quickly remove moisture from the surrounding ground. Water tables rise and fall, the ground freezes and thaws, summer drought and winter snows can all have an effect. As a result of this a one-piece base, cast in-situ, will usually have the least risk of allowing the oil storage tank to move and where necessary steel mesh can be added to give additional protection where poor ground conditions and point loads from brick or block piers exist. However; with suitable account being taken of ground conditions and site preparations, groundworks can achieve a stable platform on to which precast lintels or paving slabs can be installed to achieve a suitable level of performance.
1.7.7 Ground Types for Oil Storage Tanks
It is important to establish the stability of the ground to determine the thickness of the compacted hardcore required. Bases constructed of paving slabs will require a more substantial compacted hardcore sub-base due to the greater potential for movement. To enable identification of sub-soil “ground types” the following field or site “Heel Test” is given (as supplied by Cameron Taylor Consulting Engineers). Remove the top vegetated soil layer until the proposed level for the addition of hardcore is reached. A full-grown man is then to stand on one leg on the heel of one foot on the exposed soil layer. The man then steps off and inspects whether or not any imprint is made.
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The results of the test should be compared to the following tables to determine the recommended minimum thickness of compact hardcore.
Heel Test for Paving Slab Bases
Table 3
Subsoil Heel Test Result Recommended minimum thickness of compacted
hardcore *
Rock No Heel Print 150mm
Firm No Heel Print 200mm
Soft 1mm Heel Print 300mm
Very Soft Deep Heel Print See note below
NOTE: “Very Soft” subsoil conditions are not suitable for bases constructed of paving
slabs.
Heel Test for Cast Concrete Bases
Table 4
Subsoil Heel Test Result Recommended minimum thickness of compacted
hardcore *
Rock No Heel Print 100mm
Firm No Heel Print 100mm
Soft 1mm Heel Print 200mm
Very Soft Deep Heel Print 300mm
Heel Test for Pre-cast Lintel Bases
Table 5
Subsoil Heel Test Result Recommended minimum thickness of compacted
hardcore *
Rock No Heel Print 100mm
Firm No Heel Print 100mm
Soft 1mm Heel Print 200mm
Very Soft Deep Heel Print See note below
NOTE: “Very Soft” subsoil conditions are not suitable for bases constructed of pre-
cast lintels. * All hardcore should be compacted using a Wacker plate or some such other applicable
method.
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1.7.8 General Site Layout of an Oil Storage Tank Base
Diagram 12 shows an example of a plastic oil storage tank shown on a platform that fully supports the whole of the underside of the oil storage tank. The platform is raised by piers on a base constructed from pre-cast concrete lintels laid on level compacted hardcore. The minimum size of the base is calculated from the overall length (or diameter) of the oil storage tank + 300mm at each end and the width of the oil storage tank + 300mm at each side. The diagram also shows the relationship between a boundary and an oil storage tank position.
Diagram 12
Air routes
(Designed to minimise
Interference)
300
min
300
min
Base
PLAN
300
300
min
min
*Max span= =
Tank
215
Pie
r
Pie
r
Round Tank
Base
300
300
min
min
1000 m
ax**
Base
Platform
Pier
Tank
SECTION
PLAN
Base may be round
Notes to Diagram 12 * The maximum unsupported span as specified by the lintel manufacturer ** Where installations require tanks to be elevated in excess of 1m from the base, a
supporting structure of a more complex design may be required. = The maximum permitted unsupported overhang should not exceed 50% of the
unsupported span, and the tank manufacturer’s installation instructions should be followed.
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1.8 Plastic Oil Storage Tank Bases
1.8.1 Plastic Oil Storage Tank on a Concrete Base
Diagram 13 shows an example of a top outlet plastic oil storage tank positioned at ground level on a concrete base. Bottom outlet oil storage tanks may need to be raised on a platform for the maintenance of filter units and fittings located at the oil storage tank outlet. The base is constructed from 100mm minimum thickness concrete (1:2:4 mix or equivalent) laid on top of 100mm minimum of compacted and blinded hardcore to enable a stable base. When poor site/ground conditions exist A142 steel mesh should be incorporated as reinforcement. NOTE: This arrangement is not suitable for steel oil storage tanks without integral base
supports, which raise the tank above the base as corrosion to the base of the oil storage tank would otherwise occur.
Diagram 13
2010 Edition | Section 1 | Page 44
1.8.4 Plastic Oil Storage Tank on Platform with Concrete Base
Diagram 16 on the next page shows a vertical plastic oil storage tank with a bottom outlet which is raised on a platform with a concrete base. The base is constructed from 100mm (minimum) thick concrete laid on top of 100mm minimum of compacted hardcore to ensure a stable base. Minimum concrete mix specification 1:2:4. It is recommended to incorporate A142 steel mesh reinforcement to provide stability at the load points created by the piers. The piers should be a minimum of 215mm thick brick or block with mortared joints, and be spaced so that the overhang at either end of the platform should not exceed half of the distance between the piers. Piers should be just beyond the width of the oil storage tank to allow full support to the platform. The top of the piers should be finished with a 25mm thick mortar bedding onto which the platform is placed. The minimum height of the piers should be sufficient to enable routine maintenance and servicing of oil filters when fitted at the oil storage tank outlet and to provide sufficient gravity head as required by the appliance manufacturer. The platform is constructed from tightly abutted 65mm x 215mm pre-cast concrete lintels to BS 5977 (as commonly used in the construction industry) to create an imperforate support to the whole underside of the oil storage tank. It is important that no part of the base (bottom) of the oil storage tank overhangs the platform as the strength of the oil storage tank may be impaired. OFTEC recommends that the platform extends at least 100mm around the bottom of the tank, but reference should be made with the tank manufacturer. The platform should normally be level. For information on integrally bunded oil storage tanks with inbuilt means of sludge and contaminate removal refer to the oil storage tank manufacturers installation instructions. Where tanks are raised above ground consideration should be given to the filling of the oil tank, in particular the height of the fill point above ground. It is recommended by OFTEC that the ideal fill point connection is located at a height of no higher than 1.2m above ground level. To achieve this the use of an extended fill pipe may be required.
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Diagram 16
Plastic Tank
Base
May be round
300
min
300
min
PLAN
Platform
300
min
300
min
Platform
65mm x 215mm Precast
Concrete Lintels to BS5977
Base
100mm thick Concrete
Minimum mix specification 1:2:4
Reinforced with A142 Steel Mesh
to BS5977Compacted Hardcore
Plastic Tank
Platform
Tank
25mm
Mortar
Plastic Tank
* *215 215S
* Max 50% of S
Plastic Tank
Platform
65mm x 215mm Precast
Concrete Lintels to BS5977
Base
100mm thick Concrete
Minimum mix specification 1:2:4
Reinforced with A142 Steel Mesh to BS5977
Compacted HardcoreSECTION
1000 m
ax*
Piers
Brick or Block
Note to Diagram 16
* Where installations require tanks to be elevated in excess of 1m from the base, a supporting structure of a more complex design may be required.
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1.8.5 Plastic Oil Storage Tank on Platform with Lintel Base
Diagram 17 shows a typical bottom outlet plastic oil storage tank raised on a platform with a pre-cast concrete lintel base. The base is constructed from tightly abutted 65mm x 215mm pre-cast concrete lintels to BS 5977 (as commonly used in the construction industry) to create an imperforate base. Lintels should be laid on top of 100mm minimum of compacted and blinded hardcore to ensure a stable base. This method of base construction has abutted linear joints and therefore may not be suitable where very soft ground conditions are evident. The piers should be a minimum of 215mm thick brick or block with mortared joints, and be spaced so that the overhang at either end of the platform should not exceed half the distance between the piers. Piers should extend just beyond the width of the oil storage tank to allow full support to the platform. The top of the piers should be finished with a 25mm thick mortar bedding onto which the platform is placed. The minimum height of the piers should be sufficient to enable routine maintenance and servicing of oil filters when fitted at the oil storage tank outlet. The platform is constructed from tightly abutted 65mm x 215mm pre-cast concrete lintels to BS 5977 (as commonly used in the construction industry) to create an imperforate support to the whole of the underside of the oil storage tank. It is important that no part of the base (bottom) of the oil storage tank overhangs the platform as the strength of the tank may be impaired. OFTEC recommends that the platform extends at least 100mm around the bottom of the tank, but reference should be made with the tank manufacturer. The platform should normally be level. For information on integrally bunded oil storage tanks with inbuilt means of sludge and contaminant removal refer to the oil storage tank manufacturer’s installation instruction. Where tanks are raised above ground consideration should be given to the filling of the oil tank, in particular the height of the fill point above ground. It is recommended by OFTEC that the ideal fill point connection is located at a height of no higher than 1.2m. To achieve this, the use of an extended fill pipe may be required.
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Diagram 17
300
min
PLAN
Platform
300
min
300
min
Platform
65mm x 215mm Precast
Concrete Lintels to BS5977
Base
65mm x 215mm Precast
Concrete Lintels to BS5977
Compacted Hardcore
Plastic Tank
Platform
Tank
25mm
Mortar
Plastic Tank
* *215 215S
* Max 50% of S
Plastic Tank
Platform
65mm x 215mm Precast
Concrete Lintels to BS5977
Base
65mm x 215mm Precast
Concrete Lintels to BS5977
Compacted HardcoreSECTION
1000 m
ax*
Piers
Brick or Block
Plastic Tank
Base
300
min
Note to Diagram 17
* Where installations require tanks to be elevated in excess of 1m from the base, a supporting structure of a more complex design may be required.
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1.9 Steel Oil Storage Tank Bases
1.9.1 Steel Oil Storage Tanks with Integral Base Supports
Steel oil storage tanks of the design type shown in diagram 2b on page 15 of this section which include steel supports which raise the bottom of the tank above the tank base may utilise tank base designs as depicted for plastic tanks in diagrams 13, 14 and 15.
1.9.2 Steel Oil Storage Tank on Piers with Concrete Base
Diagram 18 shows a typical single skin steel oil storage tank raised on piers with a concrete base. The base is constructed from 100mm minimum thickness concrete base laid on top of 100mm minimum of compact and blinded hardcore to ensure a stable base. Minimum concrete mix specification of 1:2:4. It is recommended to incorporate A142 steel mesh reinforcement to provide stability at the load points created by the piers. The piers should be a minimum of 215mm thick brick or block with joints mortared together and be spaced in accordance with the table shown within the diagram, which is based upon the bottom plate thickness of the tank. Piers should extend just beyond the width of the tank to allow the loading to be transferred through the side plates of the oil storage tank. The top piers should be finished with a 25mm thick mortar bedding, then a damp-proof membrane (DPM) to create a damp proof course (DPC) which the oil storage tank is placed. The minimum construction height of the piers is 150mm (dependant on appliance and filter access requirements) thus allowing a relatively low level steel tank installation to be created. This enables:- 1. Air movement around the oil storage tank to help prevent corrosion. 2. Visible routine inspection of the underside of the oil storage tank to be made. 3. Routine maintenance and servicing of oil filters (in accordance with manufacturer’s
instructions) when fitted at the oil storage tank outlet. 4. The oil storage tank to be raised above the base to reduce exposure to rain splash. Where installations require tanks to be elevated in excess of 1m from the base, a supporting structure of a more complex design may be required. Piers for single skin tanks should create a fall from the outlet end of the tank to the opposing end where a drain valve is integral to the tank, approximately 20mm fall per metre length of tank. This fall creates a trap at the rear of the oil storage tank for sediment and condensation to accumulate which can be periodically removed via a sludge cock valve. Integrally bunded steel oil storage tanks with in built means of sludge and contaminate removal, may not require a fall to be provided. For further information, please refer to the oil storage tank manufacturer’s installation instructions. An alternative to constructing masonry piers on a concrete base is to utilise a prefabricated steel tank stand. These stands should be manufactured by the steel tank manufacturer specifically for the shape, size and type of oil storage tank to be installed. Where tanks are raised above ground consideration should be given to the filling of the oil tank, in particular the height of the fill point above ground. It is recommended by OFTEC that the ideal fill point connection is located at a height of no higher than 1.2m. To achieve this, the use of an extended fill pipe may be required.
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Diagram 18
DPC
Tank
25mm
Mortar
NOTE:
The maximum permitted unsupported
overhang should not exceed 50% of
unsupported span, and the tank
manufacturers’ installation
instructions should be followed.
Steel Tank
Pie
r
Pie
r
PLAN
Base
Steel
Tank
SECTION
Steel Tank
Base
100mm thick Concrete
Minimum mix specification 1:2:4
Reinforced with A142 Steel Mesh to BS5977
Compacted Hardcore
Piers
Brick or Block
DPC
1000 m
ax
150 m
in
Steel Tank
OutputDrain
* Maximum
unsupported span
20mm per metre fall
* Industry normal
Bottom Plate
Thickness
Maximum unsupported span
between piers
2mm 450mm
2.5mm 550mm
3mm* 600mm
Note to Diagram 18 * Where installations require tanks to be elevated in excess of 1m from the base, a
supporting structure of a more complex design may be required.
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1.9.3 Steel Oil Storage Tank on Piers with Lintel Base
Diagram 19 shows a typical single skin steel oil storage tank raised on piers with a pre-cast lintel base. The base is constructed from tightly abutted 65mm x 215mm pre-cast concrete lintels to BS 5977 (as commonly used in the construction industry) to create an imperforate base. Lintels should be laid on top of 100mm minimum compacted and blinded hardcore to ensure a stable base. This method of base construction has abutted linear joints and therefore may not be suitable where very soft ground conditions are evident. The Piers should be a minimum of 215mm thick brick or block with joints mortared together and be spaced in accordance with the table shown within the diagram, dependant upon the bottom plate thickness. Piers should extend just beyond the width of the oil storage tank to allow the loading to be transferred through the side plates of the oil storage tank. The top piers should be finished with a 25mm thick mortar bedding, then a damp-proof membrane (DPM) to create a damp proof course (DPC) onto which the oil storage tank is placed. The minimum construction height of the piers is 150mm (dependant on appliance and filter access requirements) thus allowing relatively low level steel tank installation to be created. The enables:- 1. Air movement around the oil storage tank to help prevent corrosion. 2. Visible routine inspection of the underside of the oil storage tank to be made. 3. Routine maintenance and servicing of oil filters (in accordance with manufacturer’s
instructions) when fitted at the oil storage tank outlet. 4. The oil storage tank to be raised above the base to reduce exposure to rain splash. Where installations require tanks to be elevated in excess of 1m from the base, a supporting structure of a more complex design may be required. Piers for single skin tanks should create a fall from the outlet end of the tank to the opposing end where a drain valve is integral to the tank, approximately 20mm fall per meter length of tank. This fall creates a trap at the rear of the oil storage tank for sediment and condensation to accumulate which can be periodically removed via a sludge cock valve. Integrally bunded steel oil storage tanks with in built means of sludge and contaminate removal, may not require a fall to be provided. For further information, please refer to the oil storage tank manufacturer’s installation instructions. An alternative to constructing masonry piers on a lintel base is to utilise a prefabricated steel tank stand. These stands should be manufactured by the steel tank manufacturer specifically for the shape, size and type of oil storage tank to be installed. Where tanks are raised above ground consideration should be given to the filling of the oil tank, in particular the height of the fill point above ground. It is recommended by OFTEC that the ideal fill point connection is located at a height of no higher than 1.2m. To achieve this, the use of an extended fill pipe may be required.
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Diagram 19
DPC
Tank
25mm
Mortar
NOTE:
The maximum permitted unsupported
overhang should not exceed 50% of
unsupported span, and the tank
manufacturers’ installation
instructions should be followed.
Steel Tank
Pie
r
Pie
r
PLAN
Base
Steel
Tank
* Industry normal
SECTION
Steel Tank
Base
65mm x 215mm Precast
Concrete Lintels to BS5977
Compacted Hardcore
Piers
Brick or Block
DPC
1000 m
ax
150 m
in
Steel Tank
OutputDrain
* Maximum
unsupported span
20mm per metre fall
Bottom Plate
Thickness
Maximum unsupported span
between piers
2mm 450mm
2.5mm 550mm
3mm* 600mm
Note to Diagram 19
* Where installations require tanks to be elevated in excess of 1m from the base, a supporting structure of a more complex design may be required.
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1.11 Extended Fill Pipes
1.11.1 Above Ground Extended Fill Pipe Installation
Extended fill pipes run above ground must be installed using steel pipe with a minimum size of 2" (50mm) diameter which is supported with proprietary clips and brackets. Where steel pipe is used, it must be protected from corrosion. Galvanised pipes and fittings must not be used, this is to prevent electrolytic corrosion of dissimilar metals. Where the oil storage tank is located lower than its filling connection, care must be taken to ensure that the pressure head of oil applied during filling is not excessive and should be arranged to be self-draining, preferably into the oil storage tank. Where the oil storage tank is located higher than its filling connection a non-return valve should also be installed at the fill point (see diagram 1a). The fill point is where the hose from the tanker connects to the tank or associated pipework. Where the use of an extended fill pipe means that the delivery driver cannot see the oil storage tank it should be provided with secondary containment and an overfill prevention device. Remote monitoring gauging is also recommended. Extended fill pipes should terminate with a non-return valve (where lower than the tank), isolation/gate valve, 2" (50mm) BSP connection point with weep hole and screwed cap (see diagram 1a)
1.11.2 Extended Fill Pipe Installation in a Building
The running of extended fill pipes through buildings has to be undertaken with great care to design out any risk of oil contaminating the building structure. They should be constructed of heavy-duty steel to BS 1387 and routed in concealed positions, whilst maintaining access to joints. Where pipes pass through the walls of buildings it is recommended that they are protected with an oil resistant sleeve, such as painted steel. No joints should be contained within the sleeve. Consideration should be given to running the pipe through an oil-proof sleeve incorporating a leakage detector.
1.11.3 Underground Extended Fill Pipe
It is recommended that the fill point access be above ground. If the fill point access is installed below ground, access through a manhole cover should be adopted. It is essential to use a good quality double-sealed cover to prevent water entering the access joints. Manhole covers must be of sufficient strength to carry any traffic likely to impose a load on them. Extended underground steel fill pipes should be installed using the material and construction methods as per above ground installations, excepting that the fill pipe must be installed away from other below ground services and to a depth/and or in a manner which provides suitable protection against both mechanical and corrosive damage. The use of oil line warning tape is strongly recommended when backfilling any trenching to warn of the location of the fill pipe should any future excavations take place.
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Where plastic pipe systems are utilised underground they should be approved for purpose and fuel as per the Institute of Petroleum (Energy Institute) Performance Specification for Underground Pipework Systems at Petrol Filling Stations. For manufacturers of approved plastic pipe please see the OFTEC Equipment Directory at www.oftec.org. Detailed information on the installation of plastic pipework systems must be obtained from the plastic pipe manufacturer before specification and installation commences. In highly sensitive environmental areas the use of a pipe-in-pipe system with leak detection monitoring should be provided. For further information on site sensitivity the regional environmental authority should be contacted.
1.11.4 Multiple Installations
Where multiple oil storage tanks are installed on the same site, each oil storage tank should have its own individual fill pipe system as well as individual ancillary equipment such as gauging. The fill points on this system should be clearly labelled as to which tank each supplies and the correct grade of fuel to be contained in that tank.
1.11.5 Testing
All extended fill pipe installations must be pressure tested to prove their integrity before use. It is recommended that where single pipe systems are installed below ground, the system should be re-tested every five years if there are joints below ground and every ten years where there are no joints below ground (NB. This is a mandatory requirement for installations covered by the Control of Pollution (Oil Storage) (England) Regulations 2001. For further information see regional annexes. Pipe-in-pipe systems which incorporate leak detection monitoring should not usually need to be retested as the monitoring system will highlight any failures in the pipework. For pipe testing procedures see sub-section 2.1.18.
Oil supply pipes are normally run in plastic coated annealed copper tube, which is easily manipulated around bends and enables the pipe to be run in continuous lengths without joints. The plastic coated type should be used as this provides protection against corrosion, particularly in underground situations and where the pipe passes through or is affixed to masonry or concrete. It is important to avoid any loss of the cross sectional area of the pipe on bends. Approved types of plastic oil supply pipe can be used for underground installation only. Where plastic pipe systems are utilised underground they should be approved for purpose and fuel as per the Institute of Petroleum (Energy Institute) Performance Specification for Underground Pipework Systems at Petrol Filling Stations. For manufacturers of approved plastic pipe please see the OFTEC Equipment Directory at www.oftec.org. Galvanised pipes and fittings must not be used, this is to prevent electrolytic corrosion of dissimilar metals. Where steel pipe is used, it must be protected from corrosion. Screwed joints should only be made with taper threads to BS 21. Pipes with an inferior degree of fire resistance to those constructed of copper or steel, such as braided flexible oil lines (see Technical Book 2, Diagram 21) must be contained within the boiler casing and be protected by a fire valve in accordance with sub-section 2.4. Jointing materials must be of types intended for the grade of oil fuel. Special petroleum resisting compounds in conjunction with PTFE tape is deemed a suitable method of jointing.
2.1.2 Earth Bonding
Oil supply pipes should be provided with a main protective bonding conductor in accordance with BS 7671:2008. Regulation 544.1.2 states the connection to services should be made as near as practicable to the point of entry of that service into the premises. When the oil supply pipe is provided, the main protective bonding conductor should be installed from the consumer’s main earthing terminal and connected as close as is practicable to the point of entry of the building by means of an earth clamp to BS 951. Some earth clamps manufactured to BS 951 have a colour coding, which indicate if they are suitable for the environmental conditions where it is to be located. Earth clamps marked with a blue or green stripe are suitable for all conditions, including corrosive and humid atmospheres. A residual current device (RCD) should be provided to protect externally located appliances along with a circuit protective conductor. Without the provision of the RCD to the external appliance can result in an increased shock risk to persons and livestock. Additionally, if the appliance (boiler) was located externally, at the building entry point, there would be a requirement for a protective bonding conductor connected between the flow and return pipes.
Responsibility for the final connection of the protective bonding conductor to the building’s main earth terminal should be decided upon between the oil installer and the person ordering the work. In some cases the installer will arrange for a qualified electrician to perform this work or it can be arranged by the property owner. In either case, the arrangement should be recorded on the contract of work. Whoever carries out the work, the equipment should not be energised without the installation of the main protective conductor from the building main earth terminal to the entry point of the oil service pipe to the building.
2.1.3 External/Exposed Oil Supply Pipes
Oil pipes should route so as to avoid the formation of high spots where air could become trapped and affect oil flow. Where high spots are unavoidable, a means of venting trapped air should be provided. E.g. a metal vent similar to those found on convector radiators. Exposed lengths of oil supply pipe must be properly supported by robust clips securely fixed to permanent structures, e.g. armoured cable cleats with screws. Soft copper, plastic coated oil supply pipes should be affixed to ridged permanent (masonry) structures such as brick walls etc with the use of correctly sized clips (outside diameter of plastic coating e.g. 10mm outside diameter plastic coated copper pipe may require a cup size of at least 12mm plus). They should not be fixed to non permanent structures such as wooden fencing, garden sheds etc, as these may pose a risk of damage due to movement. These structures will inadvertently deteriorate with age and may be susceptible to storm damage. Ridged pipework (e.g. hard copper R290, half hard copper R250 and screwed steel pipework) should be fixed using saddle clips, ring clips or other such clipping that will hold the pipework away from corrosive elements of the structure such as alkaline attack from mortar and masonry products. Consideration should be given to avoiding routes which expose the pipe to severe chilling which could cause waxing of Class D gas oil (and heavier) grades of liquid fuel.
2.1.4 Internal Oil Supply
Inside buildings, every effort should be made to avoid the use of joints between the entry point and the boiler connection. If joints are needed, these should be of the manipulative type (soft soldered joints must not be used). Joints must be readily accessible and where concealed, must have an inspection hatch, so the joint can be inspected regularly. Where bare pipes are run internally, they should be suitably painted and protected.
2.1.5 Underground Oil Supply
It is always recommended that pipes carrying oil are installed above ground in a secure and well-protected manner. However, where this is not appropriate a buried installation would have to be considered. Oil supply pipes taking oil from a tank to a building which contains the point of use can be buried below ground level. They must be of an appropriate material such as plastic coated copper or of the approved plastic type and be protected against accidental damage. If at all possible, joints should be avoided in underground locations. Access must be provided to any buried joints (see diagram 21 and sub-section 2.1.7).
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2.1.8 Trenching
If pipes are to be directly buried, a trench depth of 450mm is recommended. In some ground conditions, a lesser depth may be suitable, but additional protection has to be provided for the oil supply pipe. For oil supply pipes, the width of the trench will normally be the width of the spade used for digging. Care should be taken to ensure that sharp objects such as stones do not protrude into the trench or the soil around it. In loose ground, temporary shuttering of the trench walls may be required. When digging is completed, the bottom of the trench should be filled with sand tightly compacted to a depth of 40mm. The pipe is then laid on the sand. The pipe should be laid down the middle of the trench. Kinking and straining, which could reduce internal diameter, must be avoided. It is also important to avoid high points being created in the pipe which could result in air locking. When the pipe has been laid, it should be pressure tested before being back filled (see 2.1.18). The pipe is then covered with a 40mm depth of sand, which is compressed to provide a protective area around the pipe. A layer of building grade polythene is then laid over the sand, to protect the sand protection layer from backfill contamination. The next stage of the work is to protect the oil supply pipe against accidental damage. The method most usually adopted is to cover the route of the pipe in half round tiles. Other methods can be used such as covering with concrete slabs. Whatever method is used, the protection must be firmly enough supported to prevent damage being caused to the pipe in the event of a force being applied down onto the protective layer. After the protective layer has been installed, the trench can be backfilled. A marker tape should be carefully laid within the backfilling about 150mm below the surface to provide a warning that an oil supply pipe is buried beneath the tape.
When the tape is in position, backfilling can be continued and left to settle before being topped up and again left to settle and compacted. As noted above, joints in buried pipework should be avoided if at all possible. If a joint is buried, access must be provided to it. A simple means of access is to use a 150mm or larger plastic drainage pipe with an end stop fitting.
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Section through a Pipe Trench
Diagram 23
Access to an Underground Joint
Diagram 24
150mm
450mm
40mm
40mm Sand First Fill
Sand Second Fill
Oil Pipe
Soil Backfilling
Marker Tape
Ground Level
Building Grade Polythene
Ground Level
Oil Pipe through Slots in access tube
Supporting slab or Pad of concrete
Slots cut in access tube to take oil pipe
150mm Plastic Drainage Pipe used as access tube
Screw-on End Stop Fitting Level with Ground
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7. Some flaring tools may leave grip marks on the pipe from the flaring process which
should be polished off with wire wool or similar. Thread the flare nut onto one end of the flare union until hand tight. Proceed to tighten the joint with the use of two spanners (or similar) making sure to hold against the fitting.
8. Once tightened firmly, pressure test the oil pipe (see sub-section 2.1.18) to ensure no
leaks are evident. If there is a loss of pressure, make sure the nut has not been cross-threaded on the fitting before proceeding to tighten further to carefully seal the leak. It is important not to over tighten the fitting and disfigure the flare. If this proves unsuccessful, dismantle the joint and examine the pipe to check that the flare was formed squarely and contains no bevels. Should the flare not be configured correctly, carefully remove the flare and revert to the start of the process.
2.1.15 Oil Filter/Water Trap
Where filters and other similar equipment are fitted in oil pipes, it is very important that sufficient clearance is left around and particularly below them to enable maintenance to take place easily and without the risk of oil being lost to the environment. A filter should always be fitted close to the oil storage tank. A further filter close to the appliance may be needed if there is any doubt about the internal condition of the oil pipe and where required by the appliance manufacturer. Where an oil strainer is used to protect the oil line from large particles, BS 5410 Part 1 requires a filtration size no greater than 150 microns to be fitted at the oil tank. To protect downstream equipment and appliances, BS 5410 Part 1 requires a filter to be fitted that has a filtration rate no greater than 70 microns. Appliance/burner manufacturers may require a greater degree of filtration as low as 10 microns. This is specifically to protect items such as burner components and Atomising Nozzles, which are available in sizes as small as 0.3USgal/h (1.15kg/h). It is important that the manufacturer’s specified filtration requirements are met. Filter bodies should either be constructed of metal or some other material with an equal degree of fire resistance. It is recommended that filters have disposable media and comply with OFTEC Standard OFS E104.
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Diagram 26 (External Wall Box Assembly)
2.1.16 De-aerator Devices
De-aeration devices can be used with pressure jet burners. Their function is to remove residual air from the fuel that may come about as a result of the burner fuel pump pulling the oil from the tank and placing it under vacuum. Not all of the fuel that passes through the burner fuel pump is used for combustion. Excess fuel returning to the de-aerator carries any bubbles so they can rise and vent to atmosphere from the de-aerator. Some designs of de-aerator are sealed and vent via the burner nozzle. A separate de-aerator is required for each burner/fuel pump installed. De-aerators typically incorporate an integral non-return valve so that the addition of a separate non-return valve in the suction pipe is not usually required. NOTE: The addition of non-return valves can cause excessive resistance beyond the
capabilities of the fuel pump. For suitable de-aerator venting positions with regard to flue terminations, see Diagram 31. External De-aerator Devices De-aeration devices constructed of plastic and which vent to the atmosphere should only be installed externally to the building and external to appliance casings. This is because their material of construction and the oil vapour emitted could constitute an increased fire hazard if installed internally or within an appliance casing. BS 5410 does not identify a specific minimum separation distance from a de-aeration device to flue termination points. However, OFTEC recommends that a radial separation distance of no less than 500mm should be achieved as depicted in diagram 31.
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De-aerator Devices in proximity to a Flue Terminal When siting an open de-aerator that vents directly to atmosphere, BS 5410 Part 1 requires that the de-aerator should not be located within 500mm of, and not above, the flue termination point. The vent termination point from an open de-aerator that vents indirectly to atmosphere should not be located within 500mm of, and not above, the flue termination point. When siting a closed de-aerator that does not vent directly to atmosphere but is manufactured from non-fire resistant materials (plastics), the de-aerator should not be located within 500mm of, and not above, the flue termination point. Closed de-aerators of metal construction (once primed are sealed and vent gases via the appliance burner) do not necessarily need to be separated as previously described but it is important that manufacturers’ installation instructions are observed.
Diagram 31 (De-aerator Devices in Proximity to a Flue Terminal)
NOTE: The following should not terminate in the shaded area:
i. An open de-aerator; ii. A de-aerator of non fire resistant construction.
Vent from an Internal Open
De-aerator
Non-Fire Resistant /
Open De-aerator 500mm
Flue Terminal
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2.1.17 Oil Lifter
Where oil has to be raised from its storage level to enable the minimum head to be provided for a vaporising burner, an oil lifter can be used. The maximum lift is approximately 8m and the lifter must be installed in accordance with the manufacturers instructions and located with regard to the static head of oil being maintained to the appliance being served, maintenance access and fire safety. Oil lifters consist of an oil reservoir and contain a pump driven by an electric motor. A float switch regulates the level of oil in the reservoir by switching the pump motor on and off. When the oil level in the oil control valve serving the burner falls its inlet needle valve opens and oil is drawn from the oil lifter. The float in the lifter falls as its fuel level drops and the motor is switched on until the reservoir level rises. When the float rises to its maximum level the motor is switched off. A safety device is incorporated within the oil lifter, which prevents overfilling of the reservoir. In addition, a low-level safety trip switches the motor off if the oil level should fall below a preset minimum control level. For further information refer to sub-section 2.2.4.
2.1.18 Oil Leakage/Pressure Testing
For all new installations, pipework alterations, and where oil leakage is suspected, the integrity of the supply pipe should be check for leak lightness. Testing is typically done using a foot pump, pressure gauge and Schrader valve, or a dedicated pressure testing device. The following procedure should be followed: 1. Always make a visual inspection first and, if necessary, assess the situation for danger.
Refer to the spillage and fire protection sections in OFTEC Technical Book 1. If there is any major pollution implication, follow the procedure in OFTEC Technical Book 1.
2. If leakage is suspected, but is not readily discernable, carry out a pressure test of the oil pipe or equipment concerned. Never pressurise equipment above its manufacturer’s specified limits.
3. To carry out a pressure test on a length of pipework, firstly isolate it, either disconnect one end or insert a fitting to enable the test equipment to be connected.
4. With long lengths of pipework it is especially important that any oil in the pipe should be removed if at all possible, in order to reduce any potential loss of fuel to a minimum during testing.
5a. For copper and steel domestic oil supply pipes only:
Pressurise the pipework to about 1 bar and leave standing for 15 minutes. If loss of pressure is obvious, take action to expose and repair or to replace pipework. If loss of pressure is not obvious, repeat test and leave standing for a further 30 minutes observing the pressure reading.
5b. For extended fill pipework with diameters up to 80mm:
Pressurise the pipework pneumatically to 1 bar and leave standing for 15 minutes. If loss of pressure is obvious, take action to expose and repair or to replace pipework. If loss of pressure is not obvious, repeat test and leave standing for a further 30 minutes observing the pressure reading.
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2.2.4 Suction Oil Supply System with Oil Lifter
For vaporising burners or situations where the existing system prohibits conversions to a two pipe oil supply system with de-aerator, it is possible to convert to a suction oil supply system using an oil lifter that provides a gravity supply. Single Oil Supply Pipe System with Oil Lifter Diagram 34 shows a typical single oil supply pipe suction system with the pipe connection through the top of the tank incorporating an oil lifter providing a gravity flow to the appliance. Oil lifters that are sited internal to a building should be enclosed within a 30 minute fire resistant chamber. The chamber should be ventilated to outside air to prevent the accumulation of oil vapours.
Diagram 34
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2.2.5 Suction Oil Supply Pipe Sizing
A vitally important part of the design of an oil supply pipe required to operate under suction is its internal diameter. This will govern and control the effectiveness of any equipment being used to draw fuel. An oversized internal pipe diameter will result in low velocities, oil running predominantly in a thin stream along one side of the pipework and the resultant formation of too much gas and air to allow the system to operate effectively.
Pipe Diameters:
Material Outside Diameter Internal Diameter
Copper
6mm 4.4mm
8mm 6.4mm
10mm 8.4mm
12mm 10.0mm
Plastic
10mm 6.7mm
15mm 11.7mm
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2.3 Oil Supply Pipe Sizing (Gravity)
2.3.1 Bottom Outlet Tanks
Some oil storage tanks are installed with bottom outlet draw off, and are often installed on raised piers to facilitate a gravity feed to the appliance. With a bottom outlet tank, oil is usually fed to the appliance using the positive pressure of gravity, so if there is a leak in either the tank or the supply pipe, it could drain the whole contents of the tank.
2.3.2 Gravity Fuel Supply Methods
Appliance manufacturers typically provide instructions for gravity oil supply layouts for domestic oil firing appliances, which must be followed. Parameters that contribute to designing an appropriate gravity oil supply include knowing:
The minimum and maximum head pressure for the appliance/equipment, and
The approximate length of oil supply pipe. Designers should also be mindful of pipe diameter, bends, fittings, and components that will affect resistance to flow.
2.3.3 And component Maximum Head Pressure
It is important that the maximum head of pressure as specified by the appliance/equipment manufacturer is not exceeded as this can result in malfunction and/or permanent damage occurring. In some circumstances, such as an oil tank which has to be installed on high ground and the appliance is located in a basement garage, the maximum head figure stated by the appliance manufacturer may be exceeded. Where instances like this occur it is possible to overcome this problem by the inclusion and fitment of a pressure-reducing valve. This valve should be installed in the oil supply pipe, upstream of the equipment it is required to protect, and be set to reduce incoming pressure to an acceptable level.
Pressure Reducing Valve
Diagram 39a
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Pressure Regulating Valve
Diagram 39b
Gravity Supply System Layout
Diagram 40
Ma
x h
ea
d
Min
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Multiple Oil Storage Tank Installation
Diagram 42
NOTE: Elevating an oil tank may bring about the need to install an extended fill pipe to facilitate safe oil delivery. Where multiple tanks are installed and remote fill pipes are required, each tank should be provided with a separate fill pipe.
Non-return
Valves
Filter
Isolating
Valve
Plastic Oil Storage Tank
Isolating
Valve
Steel Oil Storage Tank
Combined Oil Supply Pipe
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2.4 Fire Valve Installation
2.4.1 Fire Valves
For reasons of safety, a fire valve is an essential part of an appliance installation, although the fire valve body is located within the oil supply system. Fire valves should be of the remote acting type which are capable of cutting off the flow of oil outside the building in the event of a fire or overheat situation occurring at the appliance. Fire valves are available with different temperature ratings to suit the characteristics of different types of appliance. It is therefore essential that the appliance manufacturer’s instructions are followed in order to select a valve and position the heat sensor so that the valve will activate in the event of a fire or over heat at the appliances, but will not cause nuisance cut-outs. Mechanical fire valves are commercially available with standard capillary tube lengths between valve body and heat sensing phial of 1.5m, 3m, 6m, 9m, 12m, 16m, 20m and 25m. Some manufacturers will provide bespoke valves with capillary tube length of up to 35m. Electronic fire valves are less commonly available and come with cable lengths between valve body and heat sensor of up to 25m. In the event of interruption of power, electronic remote sensing fire valves generally fail safe and cease the flow of oil to the appliance. On reinstatement of power some designs will automatically reset themselves restoring the flow of oil. NOTE: Automatic resetting fire valves must never be installed with continually
burning vaporising burners due to risk of explosion if oil is permitted to flow into an extinguished, but hot, burner. Manufacturers advice should be taken if doubt exists as to the specification and correct application of fire valves.
For guidance on the installation of fire valves associated with different appliance installations, see Diagrams 43 to 48. The sole use of fusible head type (not remote acting) isolating valves is not recommended. It is recommended that new fire valves are checked for correct operation prior to fitting into the oil line. See Section 4.3.5.1 for guidance on valve testing
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2.4.4 Fire Valve Positioning for an External Boiler
Fire valves are required for externally positioned boilers even though the oil does not enter the building. BS 5410 Part 1 requires the fire valve body to be positioned external to the appliance casing with its sensor located over the burner as designated by the appliance manufacturer.
Diagram 45
* Fire valves that are located externally in a vertical position should be protected from
the elements, for example with a cover, as per manufacturer’s instructions.
External
Sensor
Burner
Fire Valve *
Oil Pipe Damp proof membrane
Damp proof course
Concrete
Internal wall
Wall cavity
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2.4.5 Fire Valve Positioning for a Vaporising Range Cooker
Oil fired range cookers need special consideration in respect of fire valve installation and the manufacturer’s advice must be followed. Where a vaporising burner is used, a fire valve sensor is fitted internally to operate a fire valve close to the appliance in a position designated by the manufacturer. This valve is not sufficient on its own to provide the required level of fire protection. An additional fire valve with its sensor positioned just above the oil control valve is required to cut off the oil supply externally before it enters the building.
Diagram 46
Diagram 46b shows fire valve arrangements when an internal oil lifter is used to provide a gravity oil supply to a cooker installation. Three fire valves are used in this layout. The operation is as follows:
Oil is cut off from entering the property if high temperature is detected at the oil lifter
Oil is cut off from exiting the oil lifter if high temperature is detected at the oil control valve
Oil is cut off from entering the oil control valve if high temperature is detected at the appliance.
IMPORTANT - Electronic type valves fitted to vaporising appliances must not be able to
automatically re-open after interruption of power supplies.
Concrete
External wall of building
Internal wall of building
Wall cavity
Damp proof membrane
Damp proof course
Sensor
Burner
Fire Valve*
Oil Pipe Fire Valve*
Oil Control Valve
Fixed Connection
Flue
Access door
Sleeve
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Diagram 46b
2.4.6 Fire Valve Positioning for a Vaporising Roomheater (Stove)
Oil fired vaporising roomheaters require the fitment of a remote sensing fire valve body externally in the oil supply before it enters the building with the valve sensor affixed at the appliance specifically as designated by the appliance manufacturer.
Diagram 47
* Fire valves that are located externally in a vertical position must be protected from the elements, for example with a cover, as per manufacturer’s instructions.
IMPORTANT - Electronic type valves fitted to vaporising appliances must not be able to automatically re-open after interruption of power supplies.
Concrete
External wall of building
Wall cavity
Damp proof membrane
Damp proof course
Sensor
Burner
Fire Valve*
Oil Pipe
Fire Valve*
Oil Control Valve
Flue
Access door
Senor located at lifter. Circa 65°C.
Oil Lifter
Chamber vented to outside - sleeved
Sleeve
Fire Valve*
Concrete
Float control
Sensor
Oil Pipe
Remote-operated Fire valve *
Damp proof membrane Damp proof course
Sleeve
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2.4.7 Fire Valve Positioning for Oil Lifters
Where an oil lifter is used, a fire valve sensor is fitted internally adjacent to the oil lifter reservoir with the fire valve body located externally. On its own this valve is not sufficient to provide the required level of fire protection. An additional fire valve installed internally adjacent to the oil lifter outlet on the gravity supply pipe is required with the sensor located at the appliance in the normal manner.
Diagram 48
* Containing a non-return valve ** Fire valves that are located externally in a vertical position must be protected from
the elements, for example with a cover, as per manufacturers’ instructions.
Concrete
Oil Line
External wall of building
Wall cavity
Damp proof membrane Damp proof course
Sensor located at lifter. Circa 65oC
Filter
Gravity supply Pipe to appliance
Remote-operated Fire valve **
Isolating valve
Remote-operated Fire valve with
Sensor at appliance
Oil lifter *
Sleeve
Sleeve
Chamber vented to outside - sleeved
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3.1.3 Polyethylene Oil Storage Tanks (OFS T100)
Oil should never be stored in translucent plastic containers due to the detrimental effects of ultraviolet light on both the plastic and the contained fuel. Purpose made oil storage tanks made from plastic materials have fill and draw-off fittings similar to steel tanks. A vent pipe is always provided to prevent over pressurisation of the tank during filling. Water/sludge and other debris can be extracted from the tank by inserting a suction pipe into the top of the tank. It is recommended that all new oil storage tanks are provided with overfill prevention devices to BS EN 13616. Plastic tanks do not require painting, so they can be installed at ground level providing adequate clearance is available under the fuel supply pipe to assess/maintain oil filter(s). Plastic oil storage tanks should be constructed and certified to comply with OFS T100 and should be covered by an OFCERTTM Licence. Tanks used for the storage of heating oil should also display a ‘CE Mark’ in compliance with the Construction Products Regulations. Where an extended fill/remote vent system is to be installed, advice should be taken from the tank manufacture to ascertain any limitations associated with the design of the tank.
Plastic oil storage tanks constructed with integral bunds are available, which removes the need to construct brick or masonry bunds. OFTEC Standard OFS T100 covers integrally bunded plastic tanks. Such tanks should hold an OFCERTTM licence to show compliance.
3.1.5 Underground Oil Storage Tanks
An oil storage tank that is to be installed directly underground must be specially designed and constructed to withstand pressures acting upon it from the outside. Recommendations in Pollution Prevention Guidance note PPG 27 should be followed. As a minimum, tanks are required to be of the double-skinned type and incorporate leak detection monitors with automatic alarms. Before specifying underground oil storage facilities, planning permission may be required and advice should be sought from Regional Environmental Authorities. Details of Regional Authorities can be found in the Regional Requirements section.
3.1.6 Service Tanks (BS 5410: Part 2)
A service tank is an auxiliary tank with a capacity not exceeding 1000L, which isolates the main storage tank(s) from the burner installation.
The following are different types of service tanks as per BS 5410 : Part 2:
Type S1 Cylindrical tanks having a capacity up to and including 250L.
Type S2 Rectangular tanks having a capacity up to and including 250L.
Type S3 Horizontal cylindrical tanks having a capacity over 250L, but not exceeding 1000L.
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Type S4 Rectangular tanks having a capacity over 250L, but not exceeding 1000L.
Type S5 Horizontal oval tanks having a capacity not exceeding 1000L.
3.1.7 Rooftop Tanks (BS 5410: Part 2)
Rooftop tanks can be either service tanks (not exceeding 1000L) or storage tanks (not exceeding 3500L). All rooftop tank installations will require Local Authority, Regional Environmental Authority or other approval at the design stage.
3.1.8 Oil Storage Tanks Suitable for Non Domestic Use
Oil storage tanks should be constructed to a standard that achieves compliance with regional environmental legislation, such as the Control of Pollution (Oil Storage) (England) Regulations 2001, the Water Environment (Oil Storage)(Scotland) Regulations 2006, or the Control of Pollution (Oil Storage) Regulations (Northern Ireland) 2011. Tanks manufactured and certified to OFTEC product standards OFS T100 for plastic or OFS T200 for steel tanks are considered to satisfy these requirements.
Specifiers and installers of oil storage tanks intended for non domestic use should obtain from the tank manufacturer written confirmation that the tank has a 20 year expected working life when correctly installed, used, and maintained. The document should be presented to the tank owner on completion of the installation and the owner advised to keep the document for the lifetime of the installation. It is recommended that the installer also retains a copy of the document for their records.
For tanks installed in areas where vandalistic damage is likely to occur, steel tanks can offer a greater degree of protection from some types of damage than those made of other materials. However, in all cases, measures should be taken to prevent unauthorised access to oil storage tanks.
3.1.9 Maintenance of Oil Storage Tanks
Steel oil storage tanks when correctly installed may require infrequent maintenance during their useful life. However, it is important that they should be inspected at least annually for any signs of corrosion or leakage (see OFTEC Technical Books 2 and 5). Where corrosion is identified, any required painting and cleaning should be carried out in accordance with BS 799 Part : 5 and the recommendations below.
Steel oil storage tank types 1 to 3 (see sub-section 3.1.1) should be cleaned externally at the manufacturer’s premises prior to dispatch.
NOTE: The tank will be protected externally with a rust inhibiting priming paint unless it is specifically requested by the purchaser that the tank be left unprotected.
The inside of the tank shall be cleaned and all openings closed to prevent ingress of debris. Sectional tanks built on site shall be cleaned externally and internally after testing and be painted externally.
Tank Types A to L (see sub-section 3.1.1)
Tanks of types A to K fabricated at the manufacturer’s works shall, before dispatch, be cleaned externally and painted with anti-corrosive paint , the inside of the tank shall be cleaned and all openings closed to prevent ingress of debris. Tanks built on site (including type L) shall be cleaned externally and internally after testing and be painted externally.
AMD 03-0613-15
2010 Edition | Section 4 | Page 15
4.3 Fire Valve Systems
4.3.1 General
Fire valves are an essential part of an appliance installation although the valve body is positioned within the oil supply system. Fire valves should be capable of cutting off the flow of oil in the event of a fire or overheat situation occurring at the appliance. The fitment of the fire valves are required by British Standard 5410: Part 2.
4.3.2 Single Appliance Gravity Supply Systems
For single appliance gravity supply systems the fire valve body should be in an accessible position preferably within the boundary of the tank chamber or catchpit (bund) unless impracticable in which case the fitment of the fire valve body should be as close to the tank as possible. Where an existing oil supply pipe is not accessible close to the tank, the cut-off point should then be at the point where the oil supply pipe is first exposed prior to entering the building or in the boiler room. Wherever possible on existing installations reconnecting to existing oil supply systems, it would be better to route a new oil supply pipe to enable the fitment of a fire valve close to the tank. See diagram 56a.
4.3.3 Multiple Appliance Oil Supply Systems
For multiple appliance oil supply systems such as pumped ring mains it is necessary that provision is made to enable the automatic shut down of the entire fuel supply system in the event that a building fire protection alarm system is activated. It is also important that each branch of a supply system serving a combustion appliance also has its own individual fire protection provision to enable the individual isolation of a branch supply to an appliance where an overheat situation has occurred. It is recommended that the fire valve body on a branch supply serving a single combustion appliance is located in an accessible position but wherever possible at least 1m away from the appliance with the sensor located at the appliance itself. See diagrams 56b – 57, 58 & 59. Diagram 62 shows an example in schematic form of a fully integrated fire protection system.
4.3.4 Fire Valve Operation
Fire valves must be automatically operated and be of the manual reset type held open by one of the following methods: Dead-Weight/Fusible Link Type Fire valves of this method are held open by the tension of wire containing one or more fusible links. The fusible links should be positioned no higher than 1m above the burner and should operate at a temperature of 68°C-74°C. Fusible links which operate at a temperature of 93°C should only be used where the ambient temperature of the boiler room exceeds 49°C. Dead-weight/fusible link fire valves consist of the valve body, weight, arm, pulleys, fusible link(s) and cable connection. This type of free fall fire valve can be used in different configurations which can be operated by heat, electronically or manually.
AMD 03-1214-24
Page 16 | Section 4 | 2010 Edition
Dead-Weight/Fusible Link Fire Valve System
Diagram 62
Reproduced by kind permission of FEL Valves Ltd.
Electronic Electronic valves operate with a solenoid valve which is activated by one or more heat sensitive devices placed above the appliance. Electronic remote sensing fire valves can be wired into the building fire alarm system so in the event of a fire being detected remote from the boiler room, the oil supply system will become isolated. Electrical solenoid valves can also be utilised as part of the full system protection system in conjunction with building fire protection alarm systems. Electronic fire valves are supplied with standard lengths of sensor cable, but they can also be ordered with lengths of up to 25m plus. This extends the flexibility of locating appliances in a variety of positions within a building whilst retaining correct fire protection. In the event of interruption of power, electronic remote sensing fire valves should fail safe and cease the flow of oil to the appliance. On reinstatement of power some designs will automatically reset themselves restoring the flow of oil. Pneumatic Pneumatic fire valves operate with an air system sealed by one or more fusible plugs. This method works by a pneumatic detection impulse operating through a mechanical link which releases the pressure in a fluid-filled pilot line releasing the holding mechanism on the valve. The pneumatic impulse is produced when the ambient air temperature rises rapidly in an expansible chamber communicating with ambient air through a vent having a restriction. In the event of a leak from the sealed circuit, pneumatic fire valves should fail safe and cease the flow of oil to the appliance.
BURNER
APPLIANCEOIL OR GAS BURNING
AUXILIARY ALARM
L,N,E TO APPLIANCE
L,N,E,
SUPPLY
OIL OR GAS
SUPPLY
PIPEWORK
CAUTION
Pulley Wheels
Mind Your Head Caution Sign
Stainless Steel Cable
Tensioner
Mercury Changeover
Switch Electro-Mechanical
Release
L,N,E Supply
L,N,E to Appliance
Auxiliary Alarm
Burner
Appliance
Fusible Link
Manual Quick Release
Anchor Fixing
2010 Edition | Section 5 | Page 8
NOTE: Numbers 17-37 inclusive should only be completed by an OFTEC Registered
Technician holding an OFT 105e qualification. See OFTEC Technical Book 4, Section 5.
38. Where electrical works have been carried out in conjunction with installation works a
certificate showing compliance with BS 7671 is required. This electrical work should only be carried out and certificates issued by a suitable qualified (e.g. OFT 103 or equivalent) technician or electrician. OFT 103 Registered Technicians can utilise OFTEC Documents CD/20 and CD/21 or equivalent for this purpose.
NOTE: Numbers 39-51 inclusive should only be completed by an OFTEC Registered
Technician holding an OFT 105e qualification. See OFTEC Technical Book 4, Section 5.
52. Sign the declaration to confirm that the installation works have been completed prior to the
commissioning of the appliance/oil installation to the appropriate Regional Building and Environmental requirements and the manufacturer’s instructions.
Page 9 | Section 5 | 2010 Edition
5.4 CD/10T (Installation Completion Report)
5.4.1 General
OFTEC Installation Completion Report form (CD/10T) is specifically designed for oil storage and supply system installations. When completed correctly it enables OFTEC Registered Technicians to show compliance with the building, health and safety regulatory requirements and the manufacturers’ installation instructions. CD/10T forms are usually supplied with the oil tank by oil tank manufacturing members and should be completed by OFTEC Registered Technicians holding the OFT 600(a) The example shown on next page gives detailed guidance on how to complete OFTEC form CD/10T.
AMD 03-1214-24
2010 Edition | Section 5 | Page 20
TI/133ND Completion Instructions 1. Record your OFTEC Registration Number (this begins with a letter and then 5 digits and
then OFTEC qualifications) and company name.
2. Record your company telephone number.
3. Record the owner of the property’s name and signature (if available).
4. Record full site address details (this is where the oil storage tank is being installed).
5. Record the full address details of the owner of the property, if different from number 4 above.
NOTE 1 on TI/133ND Where the owners name and address is different from the site
address, it is necessary to record the owners name and address in this box as it is the owner who is the responsible person under law.
6. Record date of assessment. 7. Identify the capacity of the oil storage tank.
7.1 Identify whether the oil storage tank is located within 2m of a non-fire rated
boundary where the fire rated integrity is less than 60 minutes. If ‘YES’ is selected action 1 or 2 is required. If ‘NO’ is selected then there are no hazards identified.
7.2 Identify whether the oil storage tank is located within 2m of a non-fire rated wall of a
building where the fire rated integrity is less than 60 minutes. If ‘YES’ is selected then action 1 is required. If ‘NO’ is selected then there are no hazards identified.
8. Identify the capacity of the oil storage tank.
8.1 Identify whether the oil storage tank is located within 6m of a non-fire rated
boundary where the fire rated integrity is less than 120 minutes. If ‘YES’ is selected action 3 or 4 is required. If ‘NO’ is selected then there are no hazards identified.
8.2 Identify whether the oil storage tank is located within 6m of a non-fire rated wall of a
building where the fire rated integrity is less than 120 minutes. If ‘YES’ is selected then action 3 is required. If ‘NO’ is selected then there are no hazards identified.
9. Identify whether the tank base conforms to industry recommendations and whether the
tank has been provided secondary containment in accordance with regional requirements. Also, record any comments or observations regarding the installation/condition of the tank.
10. Record name of the OFTEC Registered Technician completing the Risk Assessment and their OFTEC Registration number (this begins with a letter and then 5 digits and then OFTEC qualifications). The OFTEC Registered Technician should then sign and date the Risk Assessment.
Page 21 | Section 5 | 2010 Edition
5.8 Work Notification England and Wales
5.8.1 General
Changes to the Building Regulations in England and Wales mean that since April 1st 2005, Local Authority Building Control must be notified of any oil fired appliance, oil storage and supply system installation and commissioning works undertaken and self-certificated by OFTEC Registered Businesses and Technicians. Furthermore, building owners must receive a certificate of any works undertaken in their home/premises, and that they comply with the Building regulations in force on the date the works were completed. OFTEC registered businesses can notify their works to OFTEC, and OFTEC will inform the relevant Local Authority and provide a compliance certificate to the householder on the businesses behalf. For work notification in other regions, refer to the Regional requirements at the back of this publication.
5.8.2 Work Notification
OFTEC’s Works Notification Scheme not only meets legal requirements, but is an added benefit that OFTEC Registered Technicians can offer their customers. The only other alternative means of compliance is to arrange a Local Authority Building Control Inspection for any works subject to Building Regulations, which can be costly and time consuming. OFTEC offer three means of notifying work. This can be done by, a) registering work online (see sub-section 5.8.3), b) using the Building Regulations Work Notification Fax form (see sub-section 5.8.4) or, c) by telephoning 0845 65 85 080 / 01473 626 298. Please see the OFTEC website www.oftec.org for the latest options of performing Work Notification.
5.8.3 How to Register your Works Online
When notifying your works via the internet you will need to log into the Registered Technician’s area of the OFTEC website (www.oftec.org). Use your password to access Work Notifications. You can then:
Add a new Work Notification.
View Notification history.
Change your password. To add a new Notification you will need to input the following:
Job completion date (once entered this cannot be amended).
The address where the works were carried out. For new build, OFTEC will require details of the relevant Local Authority.
At this point you can also add your own unique job reference number. Once you have entered the site details, you will see a summary screen, click on the Add Work Details button to add work activity details.
To add the job details you will need to complete the following.
Tick the box next to the name of each technician that worked on the job.
Choose the work activity from the drop down list of notifiable jobs.
Select the quantity of the type of work.
Click save to save details of work and return to the summary screen. If you experience any problems during the online notification process simply return to the summary screen and mark the record as invalid. This will prevent the job being notified to Local Authority Building Control and there will not be a charge. Job details can be amended at any time up to the point where the Local Authority is notified. However, the date cannot be amended, so if this is incorrect mark the notification as invalid to prevent it being reported and start another record with the correct details.
5.8.4 How to Register your Works by Fax
An updated version of the Building Regulations Work Notification Fax is available from the OFTEC website (www.oftec.org). Once you have a master copy, this can be photocopied as many times as needed. The Building Regulations Work Notification Fax is spilt up into sections (1-4) which consist of a series of boxes. You should only complete the sections which correspond with the works you have completed and for which you hold the relevant class of OFTEC Registration.
1. Record your full business name as registered with OFTEC.
2. Record a telephone number where you can be contacted if a query with the Building Regulations Work Notification arises.
3. List the individual OFTEC registration numbers of the registered technicians that are employed by the Registered Business concerned (see item 4) and who undertook the notifiable work they are going to report.
4. Record your OFTEC Business Registration number (this begins with a “C”).
OFTEC Building Regulations Work Notification Fax
To submit Fax to 09055 689 003
Your Business Name
Telephone No.
OFTEC Technician No(s).
1
Yo
u
Tech. 1 Tech. 2 Tech. 3 Tech.4
OFTEC Business Registration No. C
Contact Name
Address where the work was carried out
Site
Ad
dre
ss
2
County
Town
Street
House No.
Customer Name
Post code in full
Telephone No.
New Build (tick for New Build and enter Local Authority below)
Local Authority -
2a
a
4
Installation completion date (dd/mm/yyyy) / /20 Your Own Job Ref No. (optional)
Oil w
ork
co
mp
leted
Oil Work (enter quantity alongside each work activity undertaken)
Qty
Install an oil storage tank
Install oil supply pipework
Installation of an oil-fired boiler
Install an unvented hot water storage vessel
Installation an oil-fired room heater stove or cooker
Install a non-masonry flue/chimney system
Install a flue liner
Install a hot water system without storage
Install a heating system
Install an extension to an existing heating system
4a
Qty
5I declare that the above works have been carried out in accordance with Regional Building Regulations as required.
Signature:
The cost of fax notification will be £5.00 plus VAT. (£1.00 by premium fax line plus £4.00).
For details of how to notify online for less please contact OFTEC Registration on Tel 0845 65 85 080
FORM R518 Issue 11 Sep. 2014
Ele
ctric
al w
ork
co
mp
leted
Additional Certificates
Compliance Certificates produced for oil, heating,
hot water and electrical work self-certified under
Schedule 3 of The Building Regulations 2010 are
automatically sent to the property where the work is
carried out.
If you require a duplicate certificate please call
OFTEC Registration Services on Tel 0845 65 85 080.
You will need your OFTEC Company number and
address/postcode of the property ready when
calling.
Print Name:Date:
Electrical Work
Electrical installation work can only be notified via OFTEC by a
Technician holding OFT 103 Full Scope Part P registration.
Technician Name ………………………………………
Reg. No. ……………………………………………...
Install a replacement consumer unit
Partial rewire
Circuit alteration or addition in a kitchen or special
location
Install one or more circuits
New full electrical Installation (new build)
Rewire of all circuits
3
Install an vented hot water storage vessel
4b
4c
Renewable Technology Work
Renewable technology installation work can only be notified via OFTEC by a
Technician holding OFT-501 or OFT-504 registration.
Technician Name ………………………………………
Reg. No. ……………………………………………...
Install an air source heat pump
Install a solar thermal system
Install a ground source heat pump
Install a water source heat pump
Qty
Re
new
ab
le w
ork
co
mp
leted
Green Deal
Some or all of work subject to a Green Deal Plan
None of work subject to a Green Deal Plan
Tick
1.
2.
3.
4.
5.
7.
9.
14.
15.
16.
17.
6.
8.
10. 13.
12.
11.
AMD 03-1214-24
2010 Edition | Section 5 | Page 24
5. Record a contact name of the person in your company responsible for the Building
Regulations Works Notification. 6. Record the postal address as listed with the Royal Mail where the works were carried
out. Please ensure you provide the postcode, a contact name and telephone number for the person responsible for the property.
If property is new build, tick box and record the name of the Local Authority concerned.
7. Compliance Certificates produced for oil, heating, hot water and electrical work self-
certified under Schedule 3 of The Building Regulations 2010 are automatically sent to the property where the work is carried out. Duplicate certificates can be sent electronically by signing into your company area at www.ofteconline.com.
8. The date when the works were fully completed. 9. If you have your own unique reference/invoice number for the works, you can enter it in
this section so notification is easily recognisable for you. This is optional. 10. Section 4 lists the oil work types. You are required to put the quantity (if any) next to
each item of work you have completed. E.g. If you have installed a new boiler and heating system, you are required to notify both the boiler and the system which can be done on the same submission.
10.1 Registered Technicians holding the OFT 105E qualification can notify the following
works:
Installation of an oil-fired boiler.
Installation an oil-fired room heater stove or cooker.
Install a non-masonry flue/chimney system.
Install a flue liner.
Install a hot water system without storage.
Install a vented hot water storage vessel.
Install a heating system.
Install an extension to an existing heating system.
10.2 Registered Technicians holding the OFT 600a qualification can notify the following works:
Install an oil storage tank.
Install oil supply pipework.
10.3 Registered Technicians holding the OFT 107 qualification can notify the following works:
Install an unvented hot water storage vessel. 11. Tick the appropriate box to indicate whether the work undertaken was subject to a Green
12. If renewable technology installation work is to be notified, the name and registration
number of the appropriately qualified technician (i.e. holding OFT 501 “Solar Thermal Systems” registration or OFT 504 “Heat Pump Systems” registration) should be entered here.
13. Section 4b lists the renewable technology work types. You are required to put the
quantity (if any) next to each item of work you have completed.
13.1 Technicians holding the OFT 501 qualification can notify the following works via OFTEC:
Install a solar thermal system.
13.2 Technicians holding the OFT 504 qualification can notify the following works via OFTEC:
Install a ground source heat pump.
Install an air source heat pump.
Install a water source heat pump. 14. If electrical installation work is to be notified, the name and registration number of the
appropriately qualified technician (i.e. holding OFT 103 “Full Scope Part P” registration) should be entered here.
15. Section 4c lists the electrical work types associated with oil fired equipment. You are
required to put the quantity (if any) next to each item of work you have completed.
15.1 Technicians holding the OFT 103 qualification can notify the following works via OFTEC:
Circuit alteration or addition in a kitchen or special location.
Install one or more circuits.
Install a replacement consumer unit.
Rewire of all circuits.
Partial rewire.
New full electrical Installation (new build). Reference should be made to the Regional requirements at the back of this book for further guidance on which electrical works do and do not require notification.
16. You need to sign the form to declare that the works you are notifying have been carried
out in accordance with Local Building Regulations. Without a signature, the notification will not be processed.
17. The completed form is to be faxed back to OFTEC on 09055 689 003. Check before
sending that the form has been completed fully. This is a premium rate fax line. For current cost verification, please visit the OFTEC website (www.oftec.org).
The Building Act 1984 requires a person carrying out certain types of building works to work under a Building Notice or Building Regulations approval from Local Authority Building Control. On 1st April 2002 an amendment to Regulation 12 of the Building Regulations came into force. OFTEC Registered installation, commissioning and servicing and tank installation Technicians are empowered to self certificate their own works. This exempts them from the need to give such notice when carrying out new installation work, replacement works or making a major change to the system in areas covered by their class of OFTEC Registration.
6.2.4 Work Notification
Changes to the Building Regulations mean that since April 1st 2005, Local Authority Building Control must be notified of any oil firing installation works undertaken and self-certificated by OFTEC Registered Technicians. Furthermore, building owners must receive a certificate for any works undertaken in their home/premises, declaring that they comply with the Building Regulations in force on the date the works were completed. OFTEC Registered Technicians have a choice of notifying work online at www.ofteconline.com, by fax using the Building Regulations Work Notification Fax form, or by telephone on 0845 65 85 080 / 01473 626 298. Once OFTEC receives the notification, the householder is sent a certificate of compliance (this is to show that the work has been undertaken by a competent person) and OFTEC automatically updates the Local Authority Building Control Department with the relevant information.
Type of Work Permitted to be Self Certified AND Requiring Notification
OFTEC Qualification Installation Work Control Documentation
OFT 103 Full Scope Electrical Part P
Circuit alteration or addition in a kitchen or special location
Install one or more circuits
Install a replacement consumer unit
Electrical Installation Certificate
Minor Electrical Works Certificate
CD/14 (optional)
OFT10-105E Installation of oil-fired combustion appliances
Installation of an oil-fired boiler
Installation an oil-fired room heater stove or cooker
Install a non-masonry flue/chimney system
Install a flue liner
Install a hot water system without storage
Install a heating system
Install an extension to an existing heating system
CD/10
CD/14 (optional)
CD/30 (where applicable)
OFT 107 Installation and commissioning of unvented hot water storage systems
Install an unvented hot water storage vessel
Benchmark
CD/14 (optional)
OFT 501 Solar Thermal Systems
Install a solar thermal system Benchmark
CD/14 (optional)
OFT 504 Heat Pump Systems
Install a ground source heat pump
Install an air source heat pump
Install a water source heat pump
Benchmark
CD/14 (optional)
OFT10-600a Installation of oil fuel storage and supply systems
From 1st September 2005, the Control of Pollution Regulations require all new and existing externally located above ground non-domestic oil storage tanks above 200 litres capacity to be provided with secondary containment (bunding).
From 1st September 2005, the Control of Pollution Regulations require all existing externally located above ground domestic oil storage tanks above 3500 litres capacity to be provided with secondary containment (bunding).
Agricultural Fuel Storage From 6th April 2010, the SSAFO (Silage, Slurry and Agricultural Fuel Oil) Regulations require any new or substantially altered agricultural fuel store with a capacity of greater than 1,500 litres to be:
Constructed and provided with secondary containment (bunding) to the appropriate specification; and
Notified to Environment Agency at least 14 days in advance of the installation being bought into use.
Above ground fuel tanks and areas storing oil drums must be:
Surrounded by an impermeable bund (if not of the integrally bunded type), likely to last 20 years and sited a minimum of 10 metres away from any watercourse; and
Arranged so that any permanently fixed valves or taps empty vertically downwards into the bund and shall be shut and locked in that position when not in use.
NOTE: Integrally bunded tanks which are of the bottom outlet type do not satisfy
SSAFO regulations where the fuel is to be distributed via a flexible hose. Failure to comply with these regulations may result in an inspection being performed by the Environment Agency and an enforcement notice or fine being issued.
6.2.6 Underground Pipework
Underground pipework serving an installation covered by the Control of Pollution (Oil Storage) (England) Regulations 2001 must be protected from physical damage and should also incorporate a leak detecting facility. If this is not achievable then the pipes must be pressure tested before they are first used and then again once every ten years and recorded if there are no joints and once every five years if there are joints. All joints in underground pipework must be accessible for inspection and maintenance.
6.2.7 Contact Details
To report a pollution incident contact the Incident hotline 0800 80 70 60 Environment Agency www.environment-agency.gov.uk The Department for Communities and Local Government www.communties.gov.uk
The Department for Communities and Local Government are responsible for the England and Wales Building Regulations.
Building Regulations are designed to ensure the health and safety of people in and around buildings by providing functional requirements for building design and construction, as well as promoting energy efficiency. The Building Regulations England and Wales are compiled from various Approved Documents (known as Parts). The list below shows the different Approved Documents available:
Part A Structure Part B Fire Safety Part C Site Preparation and Resistance to Moisture Part D Toxic Substances Part E Resistance to Passage of Sound Part F Ventilation Part G Hygiene Part H Drainage and Waste Disposal Part J Combustion Appliances and Fuel Storage Systems Part K Protection from Falling, Collision and Impact. Part L Conservation of Fuel and Power Part M Access to and use of Buildings Part N Glazing – Safety in Relation to Impact, Opening and Cleaning Part P Electrical Safety
Approved Documents can be downloaded from www.communties.gov.uk
6.3.2 Statutory Instruments
Statutory Instruments are the power to make law, which may be delegated by Parliament to Ministers and other persons. Statutory Instruments are the form in which delegated legislation is usually published.
The Statutory Instruments below are those that relate to oil fired equipment installation.
SI 1991 No 324 The Control of Pollution (Silage, Slurry and Agricultural Fuel Oil) Regulations 1991
SI 2000 No 2531 The Building Regulations 2000
Regulation 4 Requirements relating to Building Work
Regulation 7 Materials and Workman ship
SI 2002 No 440 The Building Regulations (Amendment) 2002 SI 2004 No 1808 The Building Regulations (Amendment No 2) 2004 SI 2004 No 3210 The Building Regulations (Amendment No 3) 2004 SI 2005 No 894 Hazardous Waste (England and Wales) Regulations 2005 SI 2006 No 658 The Building and Approved Inspectors (Amendment) Regulations
2006).
Statutory Instruments can be downloaded from www.opsi.gov.uk.
The Building Act 1984 requires a person carrying out certain types of building works to work under a Building Notice or Building Regulations approval from Local Authority Building Control. On 1st April 2002 an amendment to Regulation 12 of the Building Regulations came into force. OFTEC Registered installation, commissioning and servicing and tank installation Technicians are empowered to self certificate their own works. This exempts them from the need to give such notice when carrying out new installation work, replacement works or making a major change to the system in areas covered by their class of OFTEC Registration.
6.3.4 Work Notification
Changes to the Building Regulations mean that since April 1st 2005, Local Authority Building Control (via OFTEC see OFTEC Procedures) must be notified of any oil firing installation works undertaken and self-certificated by OFTEC Registered Technicians. Furthermore, building owners must receive a certificate of any works undertaken in their home/premises, and that they comply with the Building Regulations in force on the date the works were completed.
6.3.5 Oil Storage Tank Installation
Agricultural Fuel Storage
From 18th June 2010, the SSAFO (Silage, Slurry and Agricultural Fuel Oil) Regulations for Wales require any new or substantially altered agricultural fuel store with a capacity of greater than 1,500 litres to be:
Constructed and provided with secondary containment (bunding) to the appropriate specification; and
Notified to Environment Agency at least 14 days in advance of the installation being bought into use.
Above ground fuel tanks and areas storing oil drums must be:
Surrounded by an impermeable bund (if not of the integrally bunded type), likely to last 20 years and sited a minimum of 10 metres away from any watercourse; and
Arranged so that any permanently fixed valves or taps empty vertically downwards into the bund and shall be shut and locked in that position when not in use.
NOTE: Integrally bunded tanks which are of the bottom outlet type do not satisfy SSAFO regulations where the fuel is to be distributed via a flexible hose.
Failure to comply with these regulations may result in an inspection being performed by the Environment Agency and an enforcement notice or fine being issued.
6.3.6 Contact Details
To report a pollution incident contact the Incident hotline 0800 80 70 60
Environment Agency www.environment-agency.gov.uk
The Department for Communities and Local Government www.communties.gov.uk
6.6.1 The Building Regulations 1997-2014 (Technical Guidance Documents)
The Department of the Environment, Heritage and Local Government are responsible for the Building Regulations 1997-2014. The Building Regulations are designed to ensure the health, safety and welfare of people in and around buildings.
The Building Regulations 1997-2014 are compiled from Technical Guidance Documents. The list below shows the different Technical Guidance Documents available, which can be downloaded from www.environ.ie. Part A Structure Part G Hygiene Part B Fire Safety Part H Drainage and Waste Part C Site Preparation and Resistance to Moisture Part J Heat Producing Appliances * Part D Materials and Workmanship Part L Conservation of Fuel and Energy Part E Sound Part M Access for people with Disabilities Part F Ventilation * This includes oil storage tank installations
6.6.2 Statutory Instruments
Statutory Instruments are the power to make law, which may be delegated by Parliament to Ministers and other persons. Statutory Instruments are the form in which delegated legislation is usually published. The Statutory Instruments listed below relate to oil fired equipment installation and can be downloaded from www.environ.ie. SI No 497 of 1997 The Building Regulations 1997 SI No 284 of 2002 The Building Regulations (Amendment) Regulations 2002 SI No 581 of 2002 The Building Regulations (Amendment) (No 2) Regulations 2002 SI No 872 of 2005 European Communities (Energy Performance of Buildings) Regulations 2005 SI No 873 of 2005 Building Regulations (Amendment) Regulations 2005 SI No 854 of 2007 Building Regulations (Amendment) Regulations 2007 SI No 229 of 2008 European Communities (Energy Performance of Buildings) Regulations 2008 SI No 259 of 2008 Building Regulations (Part L Amendment) Regulations 2008 SI No 591 of 2008 European Communities (Energy Performance of Buildings) (Amendment) (No 2.) Regulations 2008 SI No 259 of 2011 Building Regulations (Part L Amendment) Regulations 2011 SI No 243 of 2012 European Union (Energy Performance of Buildings) Regulations 2012 SI No 133 of 2014 Building Regulations (Part J Amendment) Regulations 2014
6.6.3 Requirements of Technical Guidance Document J 2014
Building Regulations Technical Guidance Document J 2014, effective from 1st September 2014, covers oil burning appliances with rated outputs up to 45kW and oil storage tanks with capacities up to 3500L. Regional requirements enforced by these regulations include:
Fire valves serving externally located appliances to be at least 1m from the appliance.
Externally located oil storage tanks to be at least 1.8m from any oil burning appliance or be separated by a barrier with not less than 30 minutes fire resistance, extending 300mm above and beyond the ends of the tank.
Underground oil storage tanks to be provided with secondary containment.
6.6.4 Contact Details
To report a pollution incident contact the Local Authority for that area
The Department of the Environment, Heritage and Local Government www.environ.ie
The Planning and Building Services are responsible for the Jersey Building Byelaws. The Jersey Building Byelaws are designed to ensure that buildings are safe, healthy places in which people can live and work. The Byelaws are compiled from various Technical Guidance Documents. The list below shows the different Technical Guidance Documents available: Technical Guidance Part 1 Structure Technical Guidance Part 2 Fire Safety Technical Guidance Part 3 Combustion Appliances and Fuel Storage Systems Technical Guidance Part 4 Site Preparation and Resistance to Moisture Technical Guidance Part 5 Ventilation Technical Guidance Part 6 Drainage, Hygiene and Water Storage Technical Guidance Part 7 Stairs, Ramps and Protective Barriers Technical Guidance Part 8 Access and Facilities for Disabled People Technical Guidance Part 9 Resistance to Transmission of Sound Technical Guidance Part 10 Glazing Technical Guidance Part 11 Conservation of Fuel and Power Technical Guidance Part 12 Electrical Safety Technical Guidance Documents can be downloaded from www.gov.je
6.7.2 Work Notification
Changes to the Building Regulations mean that from July 1st 2007, Local Authority Building Control (via OFTEC see OFTEC Procedures) must be notified of any oil firing installation works undertaken and self-certificated by OFTEC Registered Technicians. Furthermore, building owners must receive a certificate for any works undertaken in their home/premises, and that they comply with the Building Regulations in force on the date that the works were completed.
6.7.3 Oil Storage & Supply Installation
All oil storage tanks in Jersey require secondary containment (Bunding) and should carry a label in a prominent position giving the Water Pollution Hotline telephone number (601535) and advice on what to do if an oil spill occurs. Oil storage tanks with a capacity of 3500 litres or less which store heating oil (i.e. Class C2 kerosene or Class D gas oil) should be sited no more than 5m from the building so as to reasonably protect the oil supply pipework. Where pipework external to the building is more than 5m in length, leak detection devices should be used.
6.7.4 Contact Details
To report a pollution incident contact the Pollution Hotline 01534 709535 States of Jersey Government website www.gov.je
Part A Structure Part B Fire Safety Part C Site Preparation and Resistance to Moisture Part D Toxic Substances Part E Resistance to Passage of Sound Part F Ventilation Part G Health and Hygiene Standards Part H Drainage and Waste Disposal Part J Combustion Appliances and Oil Tanks Part K Safe Means of Access and Egress Part L Conservation of Fuel and Power Part M Access and Facilities for Disabled People Part N Glazing Part P Estate Roads and Service Roads
6.8.2 Control of Building Work
Regulation 6 Requirements Relating to Building Work Regulation 11 Materials and Workmanship Hazardous Waste – States of Guernsey Environment Department
6.8.3 Work Notification
Changes to the Guernsey Building Regulations mean that from April 1st 2007, Local Authority Building Control (via OFTEC see OFTEC Procedures) must be notified of any oil firing installation works undertaken and self-certificated by OFTEC Registered Technicians. Furthermore, building owners must receive a certificate of any works undertaken in their home/premises, and that they comply with the Building Regulations in force on the date the works were completed.
6.8.4 Oil Storage Tank Installation
All new domestic oil storage tanks not exceeding 3400 litres are required to be 750mm from a non-fired rated boundary, if this cannot be achieved a 30 minute fire protection barrier must be provided.
All new non-domestic oil storage tanks are required to be installed to BS 5410 Part 2. It is recommended that all non-domestic oil storage tanks are provided with secondary containment (Bunding).
All new domestic oil storage tanks not exceeding 3400 litres require secondary containment (Bunding). N.B. Oil tanks installed in Guernsey should be of a type approved by Guernsey Water (bottom outlet integrally bunded oil storage tanks are currently not of an approved type).
AMD 03-1214-24
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6.8.5 Oil Supply Pipes
The Guernsey State Water Board advise:
Oil supply pipes should be a type unaffected by oil and if possible be visible for its entire length. If it is necessary to run the pipe underground, it must be sleeved and the sleeve should terminate above ground level and be continuous throughout its length (microbore type sleeving is not acceptable).
Oil supply pipes should not pass through the wall of any bund (catchpit).
If a flexible hose is used in the boiler house, this should be of a type reinforced with metal braiding and specifically manufactured for use with oil. No form of plastic or flexible pipe should be used where it could be accessible to vandals.
Plastic oil supply pipes should not enter any building and must be resistant to ultra violet light where not covered or protected from sunlight.
Filters should be fitted on the supply pipe from the tank to the burner, but must be fitted at the tank end and not the boiler.
6.8.6 Contact Details
To report a pollution incident contact the States of Guernsey 01481 717200 Environmental Department
