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SAUDI ARABIAN OIL COMPANY

Basis and Piping Wall Thickness Calculation

For

Al Khafji-FDP Phase-I Onshore Facilities

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DOC1701 A E-JO / EWO:

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CalculationBasis and Piping Wall Thickness Calculation

Crude Production, Utility and Flare

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EDSD/2616-0399.doc

Saudi Aramco 2616-ENG (03/99)

K 019645SAUDI ARABIA

REV.NO.SHT.NO.DRAWING NO.INDEXPLANT NO.DWG.TYPE

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Index

1. SCOPE............................................................................................................................................ 3

2. PURPOSE....................................................................................................................................... 3

3. REFERENCES................................................................................................................................ 3

4. DEFINITIONS.................................................................................................................................. 3

5. BASIS.............................................................................................................................................. 3

6. TECHNICAL NOTES....................................................................................................................... 4

7. APPENDIX-A................................................................................................................................... 6

8. APPENDIX-B:.................................................................................................................................. 9

9. ATTACHMENT........................................................................................................................................9

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1. Scope

This document describes the basis for the piping wall thickness calculation for Process and Utility

services to be used in Al-Khafji Field Development Phase-l Facilities (Onshore).

2. Purpose

This document shall be used as the foundation for the development of Piping Material Specifications.

3. References

Project specification:

K-005510-001 Piping Material Specification & Piping Schedule (Onshore)

Saudi Aramco Standards and Specifications:

SAES-L-105 Piping Material Specifications

SAES-L-110 Limitations on Piping Joints and Components

SAES-L-136 Pipe Selection and Restrictions

SAES-L-310 Design of Plant Piping

SAES-L-132 Material Selection for Piping Systems

SAES-L-130 Material for Low Temperature Service

SAES-L-133 Corrosion Protection Requirements for Pipelines/Piping

Saudi Aramco Material System Specification:

01-SAMSS-035 API Line Pipe

01-SAMSS-038 Small Direct Charge Purchases of Pipe

ASME B16.5 Pipe Flanges and Flanged Fittings

ASME B31.3 Process Piping

4. Definitions

PMS : Piping Material SpecificationSAES : Saudi Aramco Engineering StandardsSAMSS : Saudi Aramco Materials System SpecificationsRTR : Reinforced Thermosetting ResinCPVC : Chlorinated Poly Vinyl Chloride

5. Basis

5.1 The primary codes and specifications governing the piping wall thickness calculation are ASME B31.3, KJO Specification K-005510-001 and Saudi Aramco Engineering Standard SAES-L-105.

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5.2 The applicable hydrocarbon services in this project are non-corrosive in nature. Corrosion allowance is considered as below in line with piping material specification & piping schedule k-005510-001:

1.6 mm Carbon Steel and Impact Tested Carbon steel0.0 mm Stainless Steel, Galvanized Carbon Steel & Non metallic RTR /CPVC

5.3 As per the definition of Corrosive and Crack Inducing Sour Environments in SAES-L-133, none of the applicable Hydrocarbon services in this project can be categorized as ‘Sour Service’. Material requirements related to sour environment including NACE requirements are not applicable to this project.

5.4 Basis of Pipe Wall Thickness calculations is as follows:

Minimum pipe wall thickness is selected as per SAES-L-310 and SAES-L-105. Thickness calculations

are based on class limit conditions of ASME B16.5 in general. In few selective (large diameters and

higher class rating) cases where thickness is specified as ‘Calculate’ (as indicated in notes under

Appendix-A) in K-005510-001/SAES-L-105, pipe thickness is calculated based on the maximum line

design condition.

In few cases (as indicated in notes under Appendix-A) corrosion allowance is adjusted (reduced to

1.3 mm min.) to reach to the nearest minimum schedule. However, the selected thicknesses are

considered qualified to be used under class rating conditions.

6. Technical notes

i) Pipe selection has been done with the following criteria meeting the requirements specified under

individual piping classes of K-005510-001/SAES-L-105:

- Carbon Steel Pipes: (1CS9P, 3CS9P, 6CS9P, 9CS9P)

Up to 2” NB: Seamless,

3” NB and above: Double Submerged Arc Welded

In case Double Submerged Arc Welded pipes are not available in lower sizes, seamless pipes

shall be used.

- Impact Tested Carbon Steel : (1CA9P, 3CA9P, 6CA9P)

Up to 14” NB: Seamless

16” NB and above: Welded

- Stainless Steel : (1SD0PC, 3SD0PC, 6SD0PC)



In case ASTM A-358 Cl.1 pipes are not available in lower sizes, seamless pipes per

ASTM A-312 shall be used.

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- Super Austenitic Stainless Steel: (1SV0U)



In case A-358 cl.1 welded pipes are not available in lower sizes, seamless pipes per A-312 shall

be used.

- Galvanized Carbon Steel : (12CG0U)



ii) ERW or Spiral welded pipes are not used in hydrocarbon service.

iii) In instrument air service ERW galvanized pipe is used.

iv) All API pipes shall be as per Saudi Aramco specification 01-SAMSS-035 with the following

exceptions in Clause V – “Modifications to API SPEC 5L” of this specification:

- Clause 4.2: Optional Requirements (addition) point no. (a), (b) & (c) are not applicable.

- Clause 5.1.2 (addition): Welding Procedures for Sour service point 1 to 4 are not applicable.

- Clause 6.2.6.3: Supplementary Fracture Toughness Tests (addition) not applicable

- Clause 6.3: Residual Stress Test (addition) not applicable

- Clause 7.2.2 associated with “pipeline automatic welding” is not applicable

- Clause 7.8.14: Other defects (addition) not applicable

- Appendix-F “Supplementary Requirements” of 01-SAMSS-035

. SR15 point no.1 (regarding report of residual stress test) is not applicable.

. SR HIC is not applicable.

v) Pipes for Low temperature service (ASTM A333 & A671 grades) shall additionally meet the

requirement of cl.4.2 of Saudi Aramco specification SAES-L-130

vi) Seamless in place of welded pipes and higher grades in same material in place of lower are

acceptable.

e.g.: A106 Gr.B /A333 Gr.6 pipes acceptable in place of API 5l Gr.B

API 5l Gr.60 acceptable in place of API Gr.B.

vii) Pipe thickness calculation is done as per ASME B31.3 for all metal piping maintaining the

requirements of K-005510-001 & SAES-L-105 in general, the selected thicknesses and related

comments are summarized in Appendix-A.

Thicknesses for RTR piping classes shall be finalized in consultation with the suppliers with approval

from client.

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7. Appendix-A

WALL THICKNESSES FOR PIPING CLASSES:

Carbon steel API 5l Gr.B

1CS9P 3CS9P

150# 300#

NPSREQUIREMENT OF

SAES-L-105 /K-005510-001

CCC CALCULATIONSREQUIREMENT OF

SAES-L-105 /K-005510-001

CCC CALCULATIONS

Up to 1.5" Sch 80 Sch 80 Sch 80 Sch 80

2" Sch 80 Sch 80 Sch 80 Sch 80

3" to 6” Sch 40 Sch 40 Sch 40 Sch 40

8"

Calculate, 6.35 mm min. For D/t less than 135

Sch 40


Sch 40 (8.18 mm)

10" Sch 40 Sch 40 (9.27 mm)

12" Sch 20 (6.35 mm) Std (9.53 mm)

14" Sch 20 (7.93 mm) Std (9.53 mm); Note-1

16" Sch 20 (7.93 mm) XS (12.7 mm)

18” Sch 20 (7.93 mm) XS (12.7 mm)

20” Std (9.53 mm) XS (12.7 mm); Note-1

24" Std (9.53 mm) XS (12.7 mm); Note-2

26" to 34" Std (9.53 mm)

36" Std (9.53 mm); Note-1

38" to 48" XS (12.7 mm)

6CS9P 9CS9P

600# 900#

NPSREQUIREMENT OF

SAES-L-105 /K-005510-001


SAES-L-105 /K-005510-001

CCC CALCULATIONS

Up to 1.5" Sch 80 Sch 80

Calculate, sch 80 min.

Sch 160

2" Sch 80 Sch 80 Sch 80

3" Sch 80 Sch 80 Sch 80

4" Sch 80 Sch 80 Sch 80 Note-5



10" to 12”

Sch 40, calculate, 6.35 mm min. For D/t less than

135

XS (12.7 mm); Note-3

Calculate, sch 40 min

Sch 80 Note-5

14” XS (12.7 mm); Note-3

16” 15.1 mm Note-4

20” XS (12.7mm) ; Note-4

24" to 26” 15.9 mm Note-4

30 19.1 mm Note-4

36 22.2 mm Note-4

48 28.6 mm Note-4

Galvanized Carbon steel API 5L Gr.B 254 SMO (UNS S31254)

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12CG0U 1SV0U

150# 150#

NPSREQUIREMENT OF

SAES-L-105 /K-005510-001


SAES-L-105 /K-005510-001

CCC CALCULATIONS

Up to 1.5" Sch 40 Sch 40 Sch 40S

2”- 4" Sch 40 Sch 40 Sch 10S

6”- 24” Sch 10S

Low temp. Carbon steel A333 Gr.6/A671 Gr.CC65 Cl22

1CA9P 3CA9P

150# 300#

NPSREQUIREMENT OF

SAES-L-105 /K-005510-001


SAES-L-105 /K-005510-001

CCC CALCULATIONS

Up to 2" Sch 80 Sch 80 Sch 80 Sch 80

3" to 6" Sch 40 Sch 40 Sch 40 Sch 40

8"


Sch 40 Sch 40 Sch 40

10" Sch 40 Sch 40 Sch 40

12" Sch 20 (6.35 mm) Sch 40 Sch 40

14" Sch 20 (7.93 mm)


Std (9.53 mm)

16" to 18 Sch 20 (7.93 mm) XS (12.7 mm)

20” Std (9.53 mm) XS (12.7 mm)

24" Std (9.53 mm) XS (12.7 mm); Note-6

26"-36" Std (9.53 mm)

38”-48” XS

Low temp. Carbon steel A333 Gr.6/A671 Gr.CC65 Cl22

6CA9P

600#

NPSREQUIREMENT OF

SAES-L-105 /K-005510-001

CCC CALCULATIONS

Up to 2" XS (sch 80) Sch 80

3" to 6" XS (sch 80) Sch 80

8" XS (sch 80) Sch 80

10" XS XS (12.7 mm); Note-1

12" XS XS (12.7 mm); Note-10

Note- A: refer to 5.5 iii above

Stainless steel (A312 Gr.316L / A358 Gr.316L Cl.1)

1SD0PC 3SD0PC

150# 300#

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EDSD/2616-0399.doc




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NPSREQUIREMENT OF

SAES-L-105 /K-005510-001

CCC CALCULATIONS

REQUIREMENT OF SAES-L-105 /K-005510-

001

CCC CALCULATIONS

Up to 1.5" 40S 40S 40S 40S

2" 40S 40S 40S 40S

3"

Calculate, 10S min.

10S

Calculate, 10S min.

10S

4" 10S 10S

6" 10S 10S; Note-7

8" 10S 6.35 mm; Note-7

10" 10S 6.35 mm; Note-7

12" 10S 6.35 mm; Note-7

14" 10S 7.11 mm; Note-7

16" 10S

18" to 30” 10S

Stainless steel (A312 Gr.316L / A358 Gr.316L Cl.1)

6SD0PC

600#

NPSREQUIREMENT OF

SAES-L-105 /K-005510-001

CCC CALCULATIONS

Up to 1.5" 40S 40S

2" 40S 40S

3"

Calculate, 10S min.

40S

4" 40S

6" 40S

8" 40S; Note-8

10" 40S; Note-8

12" 40S; Note-8

14" 12.7 mm; Note-8

16" 12.7 mm; Note-8

18" 12.7 mm; Note-8

20" to 24” 14.27 mm; Note-9

Notes:

Note-1: Corrosion allowance adjusted (reduced to 1.3 mm min.) to reach to nearest minimum pipe schedule.

Note-2: Calculated as per max. Line condition- Pressure: 34 Barg; Temperature: 350 deg.C (3CS9P)

Note-3: Calculated as per line max. Condition of Pressure: 57 Barg and Temperature: 320 deg. C (6CS9P)

Note-4: Calculated as per line max. Condition of Pressure: 49.6 Barg and Temperature: 95 deg. C (6CS9P)

Note-5: Calculated as per max. Line condition- Pressure: 104 Barg; Temperature: 180 deg.C (9CS9P)

Note-6: Calculated as per max. Line condition- Pressure: 37 Barg, Temperature: -42 to 95 deg.C (3CA9P)

Note-7 : Calculated as per max. Line condition- Pressure: 40 Barg, Temperature: -70 to 95 deg.C (3SD0PC)


8 of 9


0081402

9-Oct-07

JOEL GONZALEZ

9-Oct-07

T.HON



Al Khafji

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EDSD/2616-0399.doc




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Note-10: Calculated as per max. Line condition- Pressure: 57 Barg, Temperature: 175 deg.C (6CA9P)

8. Appendix-B:

Detail calculations are enclosed herewith.

Pipe wall thickness calculations for aboveground piping are performed according to ASME B31.3 as follows:

Pd

t = ------------------------------ ------------------------ Eqn. 3a, ASME B31.3

20 * S * E + 2* P * y

(t + Ca) * 100

tr = Greater of -------------------- -- or t + Ca + Tol (mm)

100 – Tol (%)

Where

t = Pressure design thickness for internal pressure, mm

P = Internal design gauge pressure, Barg

D = Outside pipe diameter, mm

S = Stress value for material, N/mm2

E = Quality factor from table A-1A or A-1B

y = Coefficient from table 304.1.1

tr = Minimum required thickness including Mechanical, Corrosion and Erosion allowance.

9. Attachment:

Pipe wall thickness calculation sheets (21 Pages)

9 of 9


0081402

9-Oct-07

JOEL GONZALEZ

9-Oct-07

T.HON



Al Khafji

THIS

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AWIN

G A

ND

TH

E IN

FOR

MAT

ION

CO

NTA

INED

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EIN

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E TH

E SO

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PER

TY O

F SA

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WIT

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THE

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ER.

EDSD/2616-0399.doc




basis and wall thikness calc

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