Future Hazard Analysis in EN 12845‘Occupancy and Storage Classification’

Stuart LloydPrincipal Fire Protection EngineerZurich Risk Engineering UK

2

Agenda

EN 12845 status

The past & current hazard analysis

Moving forward– Non Storage– Storage– Special Hazards

3

Status

Current EN 12845 issued in 2009 – EN 12845:2004 +A2 – included amendments A1 and A2

Next EN 12845 to be published end 2014– EN 12845 Revision 1 (EN 12845:2014)

Future EN 12845 – EN 12845 Revision 2– In development– focus of this presentation

4January 2008

Occupancy Classification Taken from BS 5306 part 2 1990 (UK)

TYPE OF OCCUPANCY

Non industrial where theamount and combustibility

of the contents is low

Commercial and industrial

Processing and handlingmainly ordinary combustible

materials unlikely todevelop intensely burning

fires in the initial stages

Classification -Ordinary Hazard

Group I,II,III or IIIS (see table 3)

For example,some areas of:HospitalsHotelsLibrariesMuseumsNursing homesOffice buildingsPrisonsSchools,Colleges, etc

Goods storage - with abnormalfire loads likely to produce exceptionally intense fires

with a high rate of heatrelease

Process hazards - extrahazardous, likely todevelop rapidly and

intensely burning fires

Atticsbasementsboiler roomskitchenslaundriesstorage spacesworkrooms

Category of goodstype and height of storage

Classification -Ordinary Hazard

Group III

Classification -High Hazard

high piledstorage

Storage methodsS1 to S8

Type S9 orS10 potablespirit stores

Classification -High Hazard

process hazard

Classification – Light Hazard

5

TYPE OF OCCUPANCY

Non industrial (where theamount and combustibilityof the contents is low)

Commercial and industrial

Processing and handlingmainly ordinary combustiblematerials unlikely todevelop intensely burning fires in the initial stages

Classification -Ordinary HazardGroup I,II,III,IV

For example,some areas of:HospitalsHotelsLibrariesMuseumsNursing homesPrisonsetc

Goods storage - with abnormalfire loads likely to produce exceptionally intense fireswith a high rate of heatrelease

Process hazards - extrahazardous, likely todevelop rapidly and intensely burning fires

Atticsbasementsboiler roomskitchenslaundriesstorage spaces*workrooms

Category of goodstype and height of storage

Classification -Ordinary Hazard Group III, IV

Classification -High Hazardhigh piledstorage

Storage methodsST1 to ST6

Classification -High Hazardprocess hazard

Classification – Light Hazard

HHP 1,2,3,4

*Storage may be High Hazard due to storage height/block size

Occupancy Classification (EN & CEA)Developed from text in standards (not illustrated)

6

EN 12845 Revision 2 - Simplification of Hazard Classes

Current (10 options)– Light Hazard (LH)– Ordinary Hazard (OH 1,2,3,4)– High Hazard Process (HHP

1,2,3,4)– High Hazard Storage

Future (5 options)– Fire Hazard 1– Fire Hazard 2– Fire Hazard 3– Fire Hazard 4– High Hazard Storage

7

Future Density/Area for each FH

The most widely used density/areas have been adopted going forward

Fire Hazard Old designation Density mm/min Area wet m² Area dry m²

FH1 LH/OH1 5 72 90

FH2 OH2/OH3 5 216 270

FH3 OH4/HHP1 7,5 260 325

FH4 HHP2/HHP3 12,5 260 325

8

Non Storage Occupancies

Figure 2.3 Fire Hazards “Non-Storage” overview:

NON-STORAGE OCCUPANCIES

NON-MANUFACTURING

OCCUPANCIES

MANUFACTURING OCCUPANCIES

Fire Hazard FH4

Fire Hazard FH3

Fire Hazard FH2

Fire HazardFH1

Fire HazardFH1

Fire Hazard FH2

Classification of fire hazard based on

typical occupancies

Classification of fire hazard based

on specified occupancies

The Non-Storage Occupancies have two sub-categories: a. Non-Manufacturing and b. Manufacturing Occupancies.

9

Clearer GuidanceNon-manufacturing example

Educational Facilities Universities

Schools

Colleges

Nurseries

Prisons

Gymnasiums

 

Construction made of concrete or steel, low combustible load, no carpets.

FH1

Construction other than concrete or steel, combustible load larger than defined as FH1, Typical technical rooms with hydraulic units less than 100 L, laundries with less than hydraulic units of 100 L

FH2

Storage Rooms. HHS

Some aspects based on construction All aspects based on risk evaluation Tables identify ‘typical risks’ associated with premise type

10

Clearer Guidance Manufacturing example

Manufacturing occupancies and their associated Fire Hazard Class continued.

Occupancy Description Special Consideration Fire Hazard

Mechanical Engineering

Or Assembling Plant

-Sheet metal product factories-Metal working-Electric and Electronics equipment factories- White Appliances factories - Circuit board manufacturing- Car workshops- Fire-lighter manufacture

−Water-based emulsion for grinding, drilling, cutting, stamping processes

FH2

−injection molding (plastics) for PP/PE/PS or similar plastics

−Use of plastic logistic aids (baskets, trays, boxes, pallet, etc..)

−Soldering process−Paint application shops with water-based

paint −Electrostatic paint application−Process where combustible liquids or

cutting oils are used

FH3

−Printing works (metal foil)−Paint application shops with solvent−Plating processes−Processes involving corrosive materials

requiring plastic piping−Processes using flammable liquids.−Fire-lighter filling process.

FH4

11

Storage Classification

Categories will be called HHS Will include 5 Categories

Figure 2.2 Fire Hazards “Storage” overview:

High Hazard Storage HHS2

High Hazard Storage HHS4

High Hazard Storage HHS3

High Hazard StorageHHS5

High Hazard Storage HHS1

Determination of Storage

Configuration?

STORAGE OCCUPANCIES

Commoditiy and Fire Hazard

Classification Process?

12

Storage – Categories of Goods

Category I and II – will remain unchanged and be called HHS 1 and HHS 2

Category III and IV are being evaluated – will be split into three groups HHS 3, HHS 4 and HHS 5

– HHS 3 - Cartoned Unexpanded Plastics (laptop in box)– HHS 4 – Uncartoned Unexpanded Plastics (garden chair)– HHS 4 – Cartoned Expanded Plastics (pillows in box)– HHS 5 – Uncartoned Expanded Plastics (sheets of

polystyrene)

You should think of HHS 4 as Category 3.5

New designations will accommodate protection by proven protection schemes such as CMSA from USA

13

Special Hazards

Intended to include specific design solutions – Tyre storage– Aerosols– Hanging garments– Etc….

Figure 2.1 – Special Hazards Overview:

SPECIAL HAZARDS

Special Hazards associated to special storage configuration

Special Hazards associated to special storage commodities

Special Hazards associated to special construction properties

Special Hazards associated to special production processes

14

Future Flow Chart

FIRE HAZARDS CLASSIFICATION – Basic Evaluation

Is this a Special Hazard

OccupancyYES

Table 3.4 List of Special Hazard associated to special storage configuration.

Table 3.3List of Special Hazard associated to special storage commodities.

Table 3.1 List of Special Hazards associated with building or construction issues.

Table 3.2 List of Special Hazard associated with special production processes.

Is this a storage occupancy?

No

YES

High Hazard Storage HHS2

High Hazard Storage HHS4

High Hazard Storage HHS3

High Hazard StorageHHS5

High Hazard Storage HHS1

STORAGE OCCUPANCIES

Flow Chart 4.2.1.1 Fire

Hazard Classification Process for

Storage Commodities

Evaluation Process of

Special Hazard _ LOOK UP

Table 3.1to 3.4

Is this a non- manufacturing occupancy?

Table 5.2: manufacturing

occupancies and their associated

Fire Hazard Class.

Table 5.1: non-manufacturing

occupancies and their associated

Fire Hazard Class.

YES

NO

NO

Fire Hazard FH4

Fire Hazard FH3

Fire Hazard FH2

Fire HazardFH1

Special Storage Hazard/Special Storage Commodity?

Flow chart 2.1 Basic Evaluation Process:

Storage Configuration?

LOOK UP Section 4.3

Check for Special Storage Configuration?

NON- STORAGE OCCUPANCIES

Special Hazard YES

Special Hazard w Construction and/or Production

Sprinkler Design to adequatly protect associated fire hazards

15

Thank You, Any Questions?