D-103E

TOKYO L JAPANTOYO ENGINEERING CORP.

STANDARD ENGINEERING SPECIFICATION

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ISSUED APR. 15, 99 PAGE 1 OF 8

FORM A-G30.002 (9303)

NOTE: THIS SPECIFICATION IS VALID FOR ANY SPECIFIC PROJECT ONLY WHENMODIFIED TO COMPLY WITH SPECIFIC JOB REQUIREMENTS ANDACCOMPANIED BY A COVER SHEET. THE PARAGRAPHS INDICATED BYMARK (*) ARE SPECIFIC JOB REQUIREMENTS.

C O N T E N T S

PAGE1. GENERAL 2

1.1 Scope 21.2 Priority for the Requirements 21.3 Vendors Drawings and Responsibility 21.4 Purchasers Drawings and Specifications 21.5 Vendors Drawings and Documents 2

2. PERFORMANCE DESIGN 4

2.1 Hydraulics 42.2 Tray Geometry 4

3. MECHANICAL DESIGN 4

3.1 Material 43.2 Design Loading and Allowable Stress 53.3 Deflection 53.4 Support Beam 53.5 Tray Junctions 63.6 Tray Support Ring 63.7 Others 6

4. INSPECTION AND TESTS 7

4.1 General 74.2 Trial Assembly 74.3 Leakage Tests 7

5. PACKING AND SHIPPING 8



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FORM A-G30.002 (9303)

1. GENERAL

1.1 Scope

This specification, together with data sheets, Purchasers Requisition, Purchase Order/Inquiry, vesselEngineering Drawings sets forth the requirements for the design, fabrication, inspection, testing and supply oftrays.This specification shall apply to conventional type trays such as valve trays, bubble cap trays, sieve trays andchimney trays.

1.2 Priority for the Requirements

As a rule, priority order for the design, fabrication, inspection, testing and supply of trays is as follows ;

(1) Applicable legal requirement, if any(2) Requisitions and minutes of meeting(3) Purchasers vessel Engineering Drawings and/or data sheets(4) Purchasers Engineering Specification and Engineering Standard(5) Code and standard, if any

However where there are conflicts between these drawings and documents, such conflicts shall be promptlyreferred to Purchaser for solution.

1.3 Vendors Guarantee and Responsibility

1.3.1 Vendor shall guarantee the tray hydraulics, such as flooding approach, weep point, operating range, pressuredrop specified on requisition and/or data sheets and downcomer back up based on the system factor specified onrequisition and/or data sheets. If system factor is not specified by Purchaser, Vendor shall select the suitablefigure in consideration of the data available. In the event that certain requirements can not be practical ordesirable for the design of trays, it shall be the responsibility of Vendor to point out. In such case, alternatedesign shall be proposed by Vendor for Purchasers approval.

1.3.2 Vendor shall be responsible for the mechanical design of the trays including support beams and support

structures. 1.3.3 Tray support ring, downcomer clamping bar and all other welded-parts to vessel required for tray installation

shall be designed by Vendor. Detail drawings for such hardware shall be furnished to Purchaser for approval.

1.4 Purchasers Drawings and Specifications

1.4.1 The related Engineering Specifications to supplement this specification are as follows ;

(1) D-102E Pressure Vessels (2) R-201E Shop Quality Control Requirements (3) D-123E Vessel Standard (4) R-203E Inspection and Test Program

1.5 Vendors Drawings and Documents

1.5.1 Vendor shall submit to Purchaser drawings and documents as called in Purchasers Requisition.

1.5.2 All drawings and documents shall give the name of the client, Purchasers Work No., Item No., and name of thecommodity.

1.5.3 Drawings and documents to be submitted shall be in measurement system specified in Purchasers requisition.As a rule, drawing shall be prepared to scale and in third angle projection.



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FORM A-G30.002 (9303)

1.5.4 Vendors hydraulic calculation sheet shall contain at least;

(1) Flooding approach (jet)(2) Flooding approach (downcomer aeration, downcomer choke)(3) Downcomer back up(4) System factor(5) Weep limit (at 10% weep or at the point where Vendor can guarantee) in sieve trays(6) Entrainment limit for sieve trays(7) Tray geometry(8) Weir load(9) Crest height / froth height(10)Pressure drop

1.5.5 Vendors performance chart shall contain at least ;

(1) Jet flood curve(2) Entrainment curve(3) Weeping limit curve(4) Dumping Curve (for sieve trays only)(5) Downcomer choke flood curve(6) Downcomer aeration flood curve(7) Operating line(8) Design point / Maximum operating point / Minimum operating point

1.5.6 Tray assembly drawings and tower attachment drawings shall contain at least ;

For tray assembly drawings :(1) Mechanical design data such as design temperature, design load, allowable deflection(2) Parts number for each tray components(3) Assembly system to fasten the tray components(4) Dimension of each tray components(5) Layout and quantity of valves or perforations

especially for combined valves of heavy and light, heavy valves location shall be clearly shown(6) Valve type or perforation size(7) Downcomer width, downcomer clearance(8) Weir height(9) Depth and width of support member(10)Drain size and its location(11)Clearance between tray periphery and tower shell

For tower attachment drawings :(1) Tolerance for tower attachment if Vendor cannot agree with the requirements shown in Fig.B of

Engineering Specification D-102.(2) Width and thickness of attachment(3) Minimum throat thickness of fillet weld(4) Location of clean corner

1.5.7 Purchasers approval for drawings and documents shall not relieve Vendor of his responsibility to meet allrequirements of the purchase order.



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FORM A-G30.002 (9303)

2. PERFORMANCE DESIGN

2.1 Hydraulics

2.1.1 Vendor shall check the hydraulics by using tray loading data specified on data sheets in Purchasers Requisition.In the case that tray geometry is also specified on data sheets, Vendor shall rate the hydraulics based on suchgeometry. In the event that Vendor can not guarantee a certain hydraulic point, it shall be pointed out and thesuggested design shall be submitted.

2.1.2 In case that no tray geometry is specified on data sheets, Vendor shall decide each dimension such that Vendor

can guarantee the hydraulics.

2.2 Tray Geometry

2.2.1 In case of Vendors design, flow path length shall not less than 450mm unless otherwise specified on data sheets. 2.2.2 In case of Vendors design, the under downcomer clearance and the outlet weir height shall be determined in

consideration of the static seal. The design with no static seal is not acceptable unless otherwise specified on datasheets.

2.2.3 The quantity of perforations in sieve trays shall be tolerated within +/- 2% of that specified on data sheets orhydraulic calculation sheets.

3. MECHANICAL DESIGN

3.1 Material

3.1.1 All material shall conform to those specified on Purchasers data sheets and/or vessel Engineering Drawings. 3.1.2 Minimum thickness(including the corrosion allowance) and the corrosion allowance for trays and components

are as follows unless otherwise specified on data sheets ;

< minimum thickness >Item Carbon Steel ( mm ) Alloy Steel ( mm )Tray panel 3.5 2.0Downcomer plate, Sumps 3.5 2.0Weirs, Miscellaneous parts 3.5 2.0Chimney deck 3.5 (*1) 2.0 (*1)

Tray support beams 6 6(*1) ; Vendor to confirm whether deformation is not expected in case that chimney is installed by seal welding.

< corrosion allowance >Item Carbon Steel ( mm ) Alloy Steel ( mm )Tray panel Nil NilDowncomer plate, Sumps Nil NilWeirs, Miscellaneous parts Nil NilChimney deck 1/4 C.A.(*1) for both side NilTray support beams independent beam integral beam

1/2 C.A.(*1) for all surfaceNil

Nil

Nil(*1) ; C.A. means the corrosion allowance for vessel shell



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FORM A-G30.002 (9303)

3.1.3 In the event that the tray panel thickness is changed from that specified on data sheets, the effect on pressuredrop shall be furnished to Purchaser for approval.

3.1.4 Tray fastener material such as bolts, nuts, washers and clamps shall be 11-13% Cr for carbon steel trays andsimilar material to the tray panel material when alloy steel is specified. Minimum size of the bolting shall beM10.

3.2 Design Loading and Allowable Stress

3.2.1 Tray shall be designed with the combined load of dead weight and the uniform static load under operatingcondition. The uniform load shall be considered to act either upward or downward at design temperature.Separately, tray shall be designed in consideration of the concentrated load of 1177N (120kgf) in addition todead weight at any point on the tray. Such load shall be considered to act downward.The uniform load, the concentrated load and each allowable stress shall be determined as shown below ;

uniform static load concentrated loadActive area bottom tray & trays directly

above/below flash feed other trays

u chimney tray

4805Pa (490 kgf/m2) the largest of the followings 980Pa (100 kgf/m2) process liquid head equal

to the twice the outletweir

process liquid on tray to adepth of 100mm

the heavier of process liquid orwater on tray to a depth ofvapor riser

1177N (120kgf)

1177N (120kgf)

1177N (120kgf)

1177N (120kgf)

Under downcomer area process liquid head equal to75% of downcomer height

1177N (120kgf)

Chimney trays process liquid head equal tovapor riser height

1177N (120kgf)

Allowable stress 33% of tensile stress at designtemperature

67% of yield stress atambient temperature

3.2.2 Initial camber can be applicable to independent beams.

3.3 Deflection

3.3.1 Deflection under both operation and maintenance shall be designed so as not to exceed the followings ; Beam for both independent type and integral type having the length less than 3000mm : 3mm maximum Beam for both independent type and integral type having the length 3000mm and over : 1/800 times vessel

inner diameter maximum.

3.3.2 Initial camber upward shall be less than 1/800 times vessel inner diameter.

3.4 Support Beam

3.4.1 Independent Beam

(1) The top of the support beam shall not be protruded from the level of tray panel.



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FORM A-G30.002 (9303)

(2) The beam shall be designed to attach to shell with bolts and nuts with slot holes such that it can not be liftedor rotated and it can not be restricted from thermal expansion.

(3) The beam perpendicular to liquid flow path shall be designed so as to have its depth as 25% of the tray

spacing and less.

(4) The beam parallel to liquid flow path shall be designed so as to have its depth as 30% of tray spacing andless.

3.4.2 Integral Beam

(1) Beam shall be designed to be turned down from the tray panel.

(2) The maximum depth of the beam shall be 25% of the tray spacing.

3.5 Tray Junctions

3.5.1 All tray junctions shall be stiffened either by integral beam or independent beam. 3.5.2 The maximum width of the tray junctions in active area shall be designed such that support members do not

exceed 100mm in width.

3.6 Tray Support Ring

3.6.1 The minimum support ring width and overlapped dimension between trays and the support ring shall be asfollows ;Vessel I.D. (mm) Support Ring Width (mm) Overlap (mm)less than 900 40 20900 to 1400 50 301401 to 2600 65 352601 to 4100 75 404101 to 7500 90 507501 and over Vendors recommendation 50

3.6.2 The minimum support ring thickness shall be determined by Vendor. One(1) corrosion allowance for pressurevessel shell plus 6mm shall be kept in case of carbon steel support ring.

3.7 Others

3.7.1 All trays shall be of removable plate type so as to be passed through nearest manhole of vessel unless otherwisespecified on data sheets.

3.7.2 All tray parts except for the manway, shall be designed to be installed from top side of the tray panel. 3.7.3 Manway

(1) Each tray pass shall be provided with the manway which should form a component of the active area.

(2) The tray manway shall be in vertical alignment as far as possible.

(3) The manway shall be designed to assemble and disassemble from either side of the tray by single workman.

(4) Minimum size of the manway shall be 380mm x 450mm.

3.7.4 Fasteners / Miscellaneous



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FORM A-G30.002 (9303)

(1) At the bottom of downcomer, spacers shall be provided with spacing 600mm in center to center of spacersin order to avoid the distortion of the downcomer.

(2) Tray deck shall be fastened to support ring by clamping or equivalent devices with maximum spacing of

150mm.

(3) Seal plate shall be provided with all gap to avoid leakage.

3.7.5 Drainage

(1) Drain hole is required at the bottom of the inlet weir. 6mm half radius hole shall be provided each 2500mmlength of the inlet weir.

(2) At least one(1) drain hole of 6mm is required for the recessed seal pan unless otherwise specified on datasheets.

(3) One(1) drain hole of 6mm shall be provided in sump for every 0.9m2 sump area, unless otherwise specifiedon data sheets.

(4) In the design of the bubble cap trays, active area shall be provided with one(1) -10mm diameter weep holefor every 2.3 m2 unless otherwise specified on data sheets.

3.7.6 Seal weld is required when liquid seal is specified for trays. Manway shall be provided with gaskets.

3.7.7 Vessel Tolerance

Vessel tolerance is assumed as stipulated in Fig.B item 13a through 18 of Engineering Specification D-102Pressure Vessels. Vendor shall confirm that tray supplied can be operated without the deterioration of theperformance under the severest condition. In the event that Vendor can not accept the tolerance, the requiredtolerance shall be referred to Purchaser to incorporate into the design of vessel suppliers.

4. INSPECTION AND TESTS

4.1 General

Inspection and test of trays shall be done in accordance with inspection and test procedure furnished by Vendor,which shall be approved by Purchaser. Such procedure shall be included the following requirements describedbelow.

4.2 Trial Assembly

One(1) tray for each size and geometry shall be assembled and checked dimension and flatness at Vendors shop.Dummy manhole is required to check if all parts can be passed through.

4.3 Leakage Tests

4.3.1 Leakage test shall be carried out with water after assembling of the trays at site when liquid tight sealing isspecified in data sheet and/or data sheets.

4.3.2 Bubble cap tray shall be leak-tested under the condition of the proper level and plugging weep holes at site.

Holding time and acceptance leakage rate shall be referred to data sheets.



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FORM A-G30.002 (9303)

5. PACKING AND SHIPPING

5.1 All tray parts made of carbon steel shall be coated with a removable rust preventative grease. Trays made ofcorrosion resistance alloy steel shall be cleaned and be free from grease.

5.2 Each tray parts shall be marked with corresponding marking shown on the assembly drawings.

5.3 All fasteners shall be hard-stamped such that the material can be distinguished easily.

5.4 All tray parts shall be packed so as to be protected against damage during transportation.

5.5 Spare parts shall be supplied in accordance with Purchasers requisition. Spare parts shall be packed separatelyfrom proper tray parts in same wooden box.



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ISSUED APR. 15, 99 () PAGE 1 OF 8

Engineering Specification for Trays

TEC ABB Lummus, UOP, Shell, Mobil

ABB Lummus Grobal Inc. DB-201 4th Apr. 96

Mobil Engineering GuideEGE 12-B-21 1998 ()UOP Standard Specification 3-18-5

Shell Design and Engineering PracticeDEP 31.20.20.31-Gen Aug. 1998

Fluor Daniel Specification for Fractionating Tower Trays, Packing and

Internals (YEP Project) D-103E TEC Spec.

1. GENERAL1.1

1.3.11.3.1



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l flooding approach (jet, downcomer aeration, downcomer choke)

l entrainment / weep limit

l operating range

l pressure drop

l downcomer back up

system factorTEC system factorsystem factorsystem factor 1.01.0l (hydraulics 1 MPa{10 kgf/cm2G})l () / () < 10l l H2O

1.5.4l jet flooding approach

vapormaximum 80-85%l downcomer aerated flooding approach

downcomermaximum 80-85%l downcomer choke flooding approach

downcomermaximum 80%l downcomer back up

downcomer

: maximum 60% : maximum 50% : maximum 40%l system factor

l weep limit



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10%25%

l entrainment limit

vaporjet flood

jet flooding vaporjet flood vapor

Koch-Glitsch Ballast Tray85% jet flood10% entrainment

l tray geometry

l weir load

513 gpm/inch( 30mm CA of 10mm -- 65mm CA of 10mm -- 22mm --> 43mm1401 to 2600mm : CA of 0mm -- 60mm 1401 to 2600mm : CA of 0 to 6mm -- 25mm --> 35mm CA of 3 to 6mm -- 65mm CA of 10mm -- 29mm --> 46mm CA of 10mm -- 75mm2601 to 4100mm : CA of 0 to 6mm -- 75mm 2601 to 4100mm : CA of 0 to 6mm -- 32mm --> 43mm CA of 10mm -- 90mm CA of 10mm -- 35mm --> 55mm4101 to 5025mm : all CA -- 90mm 4101 to 5025mm : CA of 0 to 6mm -- 38mm --> 52mm

CA of 10mm -- 41mm --> 49mmMobil tower ID under 915mm : 38mm under tower ID 1065mm : 25mm under tower ID 1065mm : 13mm 25mm

915 to 1830mm : 50mm 1065 to 2130mm : 38mm 1065 to 2130mm : 12mm 27mm1855 to 3050mm : 65mm 2160mm to 3050mm : 50mm 2160mm to 3050mm : 15mmover 3050mm : 75mm 3070mm to 3960mm : 65mm 3070mm to 3960mm : 10mm

over 3960mm : 75mm over 3960mm : 0mmUOP tower ID up to 900mm : 40mm not specified not specified

900 to 2100mm : 50mm2100 to 3900mm : 65mm3900 to 6000mm : 75mm6000 to 7500mm : 90mm7500 and over : individual design

Shell For traytower ID under 800mm : 40mm --> 15mm 20mm 25mm 40mm 45mm 45mm 42mm 20mm 20mm 25mm 35mm 40mm greater than 40mm

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