plate calculation.xls

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PIPE WALL THICKNESS CALCULATION

Document Number

2006-4200-1J-0001

Project No.: 1012

CTR No.: COM-PL-100-02

E 01 Jul 13 Issued for Review Orlando Rivera

Rev Date Purpose of Issue Prepared Checked PM Approval CLJOC Approval

Nguyen Van Tinh Kamal K. Ravi PTSC MC Approval KVJ KVJ SOE

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REVISION RECORD SHEET

No. Rev. No Content of Revision Date of Revision

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1 2 TABLE OF CONTENTS 3 4 1. SCOPE 4 5 2. DEFINITIONS 4 6 3. REFERENCES 4

7 3.1 CODES, STANDARDS AND SPECIFICATIONS 4

8 3.2 COMPANY PROJECT SPECIFIC SPECIFICATIONS 4

9 3.3 OTHER REFERENCES 4

10 4. DESIGN PARAMETERS 4

11 4.1 DESIGN PRESSURE 4

12 4.2 DESIGN TEMPERATURE 4

13 4.3 ALLOWABLE STRESS VALUE 5

14 4.4 CORROSION ALLOWANCE 5 15 4.5 EROSION ALLOWANCE 5 16 4.6 MECHANICAL ALLOWANCE 5 17 4.7 MILL TOLERANCE 5 18 5. METHODOLOGY 5 19 6. EXCEPTIONS 6

20 7. PIPE WALL THICKNESS CALCULATION 6

21 7.1 PIPING CLASS A1 7 22 7.2 PIPING CLASS A2 8 23 7.3 PIPING CLASS A6 9 24 7.4 PIPING CLASS A8 10 25 7.5 PIPING CLASS A9 11 26 7.6 PIPING CLASS B1 12 27 7.7 PIPING CLASS B6 13 28 7.8 PIPING CLASS D1 14 29 7.9 PIPING CLASS D11 15 30 7.10 PIPING CLASS E1 16 31 7.11 PIPING CLASS E6 17

32 7.12 PIPING CLASS E11 18

33 7.13 PIPING CLASS F1 19 34 7.14 PIPING CLASS F6 20 35 7.15 PIPING CLASS F10 21 36 7.16 PIPING CLASS F11 22 37 7.17 PIPING CLASS G6 23 38 8. CONCLUSION 24 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 Page No.: 3 of 24 56

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1

2 1. SCOPE

3 The purpose of this document is to perform calculation of pipe wall thickness of all piping classes which

4 are applicable in Su Tu Den wellhead A & B, Su Tu Vang CPP and Su Tu Nau Field Development Project. The scope covers pipe 5 wall thickness of deck platform piping and topside pipelines, which are subjected to Internal Design Pressure.

6

7 2. DEFINITIONS

8 Definition applicable to this document are: 9

10 COMPANY : Cuu Long Joint Operating Company (CLJOC)

11 CONTRACTOR

12

13 3. REFERENCES

14 3.1 CODES, STANDARDS AND SPECIFICATION

15 Following Codes, Standards and Recommended Practices are referred for calculating pipe wall thickness 16 for topsides piping or pipelines.

17

18 ASME B31.3 Process Piping

19 ASME B31.8 Gas Transmission and Distribution Piping Systems

20 ASME B31.4 Pipeline Transportation Systems for Liquid Hydrocarbons and other Liquids

21 ASME B36.10M Welded and Seamless Wrought Steel Pipes

22 ASME B36.19M Stainless Steel Pipes

23 API 5L Specification for Line Pipe

24 EEMUA 144 Specification: Tubes - Seamless and Welded

25 Note: Latest edition should be referred. 26

27 3.2 COMPANY PROJECT SPECIFIC SPECIFICATIONS

28 2006-4200-1L-0001 Piping Specification (A-G)

29 2006-4200-1L-0003 Piping Design Specification

30

31 3.3 OTHER REFERENCES

32 Ameron Bondstrand Product Catalogue 2000MFP 33

34 4. DESIGN PARAMETERS

35 4.1 DESIGN PRESSURE

36 The design pressure for a piping system shall be a minimum of 10% or 3.5 barg above the maximum operating 37 pressure, whichever is greater, unless otherwise specified by COMPANY.

38

39 4.2 DESIGN TEMPERATURE

40

41 maximum operating temperature. 42

43 For pipe wall thickness calculation design pressure and design temperature shall be as per Piping Specification (A-G)

44 Doc. No. 2006-4200-1L-0001 45 46 47 48 49

: PTSC MECHANICAL & CONSTRUCTION CO. LTD., [PTSC M&C]

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1

2 4.3 ALLOWABLE STRESS VALUE

3 Allowable stress values are referred from applicable design codes for respective piping class: 4 • Platform Process Piping: Table A-1 of ASME B31.3

5 • Gas Transportation Pipeline: Appendix D of ASME B31.8

6 • Pipeline Transportation System for Liquid: Table 402.3.1(a) of ASME B31.4 7 These values have been used for pipe wall thickness calculation.

8

9 4.4 CORROSION ALLOWANCE (CA)

10 Corrosion allowance (CA) based on piping class is used as applicable. 11

12 4.5 EROSION ALLOWANCE

13 Erosion allowance as stated in piping class is used as applicable. 14

15 4.6 MECHANICAL ALLOWANCE (C)

16 Mechanical allowances are sum of corrosion allowance, erosion allowance, any other mechanical allowance 17 and threading allowance.

18

19 4.7 MILL TOLERANCE

20 Mill tolerance has been considered as (-)12.5% for Seamless Pipes & Welded (with 100% RT) pipes. 21

22 5. METHODOLOGY

23 a) Pipe Wall Thickness Calculation as per ASME B31.3 24 The formula for metallic pipe is as follows :

25 (ASME B31.3 para. 304.1.2)

26 (when t is less then D/6; or D/t > 6)

27 tm = t + c

28 T' = (T" x (1.00 - MT)) (wall thickness selection validity; T' > tm ; ASME B31.3 Appendix S para. S301.2) 29

30 The formula for GRE pipe is as follows :

31 (ASME B31.3 para. A304.1.1)

32

33 tm = t + c

34

35 t = pressure design thickness (mm)

36 tm = minimum required thickness plus corrosion, mechanical and erosion allowance (mm) 37 c = sum of mechanical allowances. (mm) (corrosion, erosion & threading allowances).

38 MT = factor to account mill tolerance on pipe wall thickness. (0.125 for seamless pipes and welded pipes) 39 T" = selected wall thickness

40 T' = wall thickness after deducting mill tolerance from T"

41 P = internal design pressure (bar) for calculation purpose converted to MPa. 42 D = outside diameter of pipe (mm)

43 S = basic allowable stress for the material

44 E = quality factor, as per table A-1A or A-1B of ASME B31.3. 45 Y = co-efficient, as per table 304.1.1 of ASME B31.3.

46 W = weld joint strength reduction factor, as per para. 302.3.5(e) of ASME B31.3. 47 F = Service (design) factor, as per para. A302.3.2(c)

48 49 50 51 52 53 54 55 56 Page No.: 5 of 24 57

Document No.: 2006-4200-1J-0001 Revision E

t=

PD

2(SEW + PY )

t =

PD

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1

2 b) Pipe Wall Thickness Calculation as per ASME B31.8

3 The formula is as follows :

4 (ASME B31.8 para. 841.1.1)

5 6 7

8 t = nominal wall thickness converted to mm

9 = minimum required thickness plus corrosion, mechanical and erosion allowance (mm) 10 c = sum of mechanical allowances. (mm) (corrosion, erosion & threading allowances). 11 T" = selected wall thickness as per ASME B36.10M / ASME B36.19 M.

12 P = internal design pressure (bar) for calculation purpose converted to psig. 13 D = outside diameter of pipe (in)

14 S = specified minimum yield strength; as per Appendix D (psig) 15 F = design factor; as per Table 841.1.6-1

16 E = longitudinal joint factor as per Table 841.1.7-1 17 T = temperature derating factor; as per Table 841.1.8-1 18

19 c) Pipe Wall Thickness Calculation as per ASME B31.4

20 The formula is as follows :

21 (ASME B31.4 para. 404.1.2)

22 (ASME B31.4 para. 404.1.1)

23 S = 0.72 x E x SMYS (ASME B31.4 para. 402.3.1)

24

25 t = nominal wall thickness converted to mm

26 = minimum required thickness plus corrosion, mechanical and erosion allowance (mm)

27 A = sum of mechanical allowances. (mm) (corrosion, erosion, external pressure & threading allowances). 28 T" = selected wall thickness as per ASME B36.10M / ASME B36.19 M.

29 = internal design gage pressure (bar) for calculation purpose converted to psig. 30 D = outside diameter of pipe (in)

31 S = allowable stress value (psig)

32 E = quality factor as per Table 402.4.3 of ASME B31.4

33 SMYS = specified minimum yield strength; as per Table 402.3.1a of ASME B31.4 (psig) 34

35 6. EXCEPTIONS

36

37 connections. For non-standard pipe size, the pipe wall thickness calculation should be calculated as per case

38 basis.

39

40 7. PIPE WALL THICKNESS CALCULATION

41 Following sections cover the pipe wall thickness calculations.The 'Sch' gives the minimum selected schedule 42 or wall thickness of pipe wall after the calculation. The pipe wall thicknesses are calculated in accordance with 43 ASME B31.3 for topside piping, ASME B31.8 for topside gas pipeline and ASME B31.4 for topside liquid pipeline. 44 45 46 47 48 t_m = t + c t_m t = (Pi·D)/(2S) t_n = t + A tn Pi

Pipes with sizes 1_/

4”, 11/4”, 21/4”, 31/2”, 5”, 7”, 9” and 22” shall not be used unless required by equipment

SFET

PD

t

2

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1 PIPING CLASS E11 _{Design Code :} _{ASME B31.8/31.3}

2 I) PIPE WALL THICKNESS CALCULATION

3 Piping Spec. Code : E11

4 ASME Class : 900#

5 Pipe Material Standard: : API 5L Gr. X65 PSL 2 6 Material Type : CS, Ferritic Steel, Pipeline Spec. 8

8 Design Pressure, P : 153.0 barg 2219.08 psi Temp S S

9 Design Temperature, T : 38.0 (bar) (psi)

10 S @ 38.0 : 4482 barg 65000 psi 0.0 4482 65000 11 c : 3 mm 22.0 4482 65000 12 F : 0.5 38.0 4482 65000 13 E : 1.00 65.0 4482 65000 14 T : 1.00 85.5 4482 65000 15

7 Plate cover Material A36

16 S 1330 barg 19290 psi

17 Ref Design Code: ASME B31.8 para. 841.11

18 ts = [( P x D) / ( 2 S F E T)]

19 where as defined in para. 5.b of this document 20 21 Hydrotest check 22 = 23 24 = 1.5 * P 25 = 229.50 barg 22.95 MPa 26 27 28 Pipe Pipe OD tr ts tm Sch1 T" 0.9*S Hydrotest Check

29 NPS ( in ) (mm) (mm) (mm) (mm) (mm) (mm) (MPa) (MPa) (Pass / Fail)

### 6 6.625 168.3 5.745 8.745 80 12.70 9.50 9.50 152.04 403.34 Pass

### 10 10.750 273.1 9.322 12.322 60 14.30 12.70 14.30 219.11 403.34 Pass

### ###

###II) PLATE COVER THICKNESS CALCULATIOn ###

### Ref Design Code: ASME VIII, Div I UG (34) (C-2) Formular 1

### t = SQRT (CP/SE) ### ### C = 0.33 for Figure (g) ### ### For pipe 6"t = 32.79 ### For pipe 10"t = 53.20 ### ### ### ### ### ### ### LEGEND: ### Sch1 =

### Wall thickness in mm of Sch1, as per ASME dimensional standard.

### Wall thickness in mm specified as per Table 5-1 Pipeline Wallthickness Calculation Doc no. 2006-6031-2J-0001 ### ### ### Page No.: 18 of 24 ### 0_C ₍0_{C )} 0_C S_hoop P_hyd * D 2 * t_sch1 P_hyd tSch1 tPL Shoop

Schedule selected as next higher of t_m, as per ASME dimensional standard. t_Sch1 =

t_PL =