Thickness Calculations as Per ASME B 31.3, 31.4 and 31.8

PAGE CALCULATIONS 1 OF 6 THICKNESS AS PER ASME B 31.3 REV

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DOCUMENT NO. Design code Pipe thickness

ASME B31.3 Minimum thickness of pipe selected, T >= tm + manufacturer's minus tolerance(12.5%) Minimum required thickness, tm = t + c Pressure design thickness, t = PD 2(SEW+PY)

Piping spec Pipe details Pipe material

Seamless

ASTM A 105 48

ASME B 36.10

Pipe size (outside diameter)

D

Design Pressure

P

600

psig

Design Temperature Basic allowable stress in tension at design temperature (from Table A-1)

T

100

0

S

20000

psig

Corrosion allowance Longitudinal weld joint factor (form Table A-1B)

c

2

MM

E

1

(E = 1, for seamless pipes)

Y

0.4

(Y = 0.4, for temperatures at 9000F and below)

W

1

(W = 1, for Temperatures at 9500F and below)

Coefficient (from Table 304.1.1) Weld joint strength reduction factor, per para 302.3.5 (e)

NPS F

Pipe size

Outside diameter

t

c

tm

tm + (negative mill

(NPS) 1/2 3/4 1 1 1/4 1 1/2 2 3 4 6 8 10 12 14 16 18 20 48

(MM) 21.3 26.7 33.4 42.2 48.3 60.3 88.9 114.3 168.3 219.1 273 323.8 355.6 406.4 457.2 508 1219.2

(MM) 0.32 0.40 0.50 0.63 0.72 0.90 1.33 1.70 2.51 3.27 4.07 4.83 5.30 6.06 6.82 7.57 18.18

(MM) 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00

(MM) 2.32 2.40 2.50 2.63 2.72 2.90 3.33 3.70 4.51 5.27 6.07 6.83 7.30 8.06 8.82 9.57 20.18

tolerance of 12.50 %) 2.65 2.74 2.85 3.00 3.11 3.31 3.80 4.23 5.15 6.02 6.94 7.80 8.35 9.21 10.08 10.94 23.06

Selected thickness,T (MM) 2.77 2.87 2.90 3.56 3.18 3.91 4.78 4.78 7.11 6.35 7.80 8.38 9.53 9.53 11.13 12.70 NA

(Note 7) Sch 40 Sch STD Sch 40 Sch STD Sch 30 ... Sch 40 Sch STD Sch 30 ... Sch 40 Sch STD Sch 30 ... Sch 30 ... Sch 40 Sch STD Sch 20 ... Sch 30 ... Sch 30 ... Sch 30 Sch STD Sch 30 Sch STD Sch 30 ... Sch 30 Sch XS #N/A #N/A

PAGE CALCULATIONS 2 OF 6 THICKNESS AS PER ASME B 31.3 REV

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DOCUMENT NO.

Notes : 1. Inputs to this sheet, are the Ivory coloured cells ie, - Pipe Material, - Design Pressure, - Design Temperature, - Basic allowable stress in tension at design temperature, - Corrosion allowance, - Longitubinal weld joint factor, - Coefficient, - Weld joint strength reduction factor. 2. Select ASME B 36.10 for carbon steel pipes and ASME B 36.19 for stainless steel pipes(for stainless steel pipes the third column in selected thickness shows "N A" as per the ASME B 36.19). 3. Select seamless for seamless pipes and welded for welded pipes. 4. This sheet gives thicknesses up to 20 NPS by default, for higher sizes the select the required size in the drop down menu against pipe size. 5. This sheet gives only schedule thickness for seamless pipes and MM thickness for welded pipes. 6. This sheet gives thicknesses for following sizes of carbon steel and stainless steel pipes, Carbon steel pipes (seamless) = from 1/2 to 48 NPS Carbon steel pipes (welded) = from 6 NPS to 80 NPS = from 1/2 to 30 NPS Stainless steel pipes (seamless and welded) 7. The column for selected Thickness gives MM thicknesses in the first column, corresponding Schedules Sch 40, 60, 80 etc in the second column and Sch XS, STD, XXS etc in the third columns as available.

PAGE CALCULATIONS 3 OF 6 THICKNESS AS PER ASME B 31.3 REV DOCUMENT NO.

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PAGE 4+2CALCULATIONS OF 6 THICKNESS AS PER ASME B31.4 REV

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DOCUMENT NO. Design code Pipe thickness

ASME B31.4 Minimum thickness of pipe selected, T >= tm + manufacturer's minus tolerance(12.5%) Minimum required thickness, tm = t + c Pressure design thickness, t = PD 2S Allowable stress, S = F x E x Specified minimum yield strength of the pipe

Piping spec Pipe details Pipe material

ASTM A 106 Gr B

Pipe size (outside diameter)

D

Design Pressure

P

Seamless

ASME B 36.10

NPS

24

3698

Design Temperature Specified minimum yield strength (from Appendix D)

psig

100

F

0

40000

psig MM

Corrosion allowance Longitudinal weld joint factor (form Table 402.4.3)

c

1.6

E

1

(E = 1, for seamless pipes)

Design Factor

F

0.5

(Client driven, F = tm + manufacturer's minus tolerance(12.5%) Minimum required thickness, tm = t + c Pressure design thickness, t = PD 2S(FET)

Piping spec Pipe details Pipe material

ASTM A 106 Gr B

Pipe size (outside diameter)

D

Design Pressure

P

Design Temperature Specified minimum yield strength (from Appendix D) Corrosion allowance Longitudinal weld joint factor (form Table 841.115A) Design Factor (from Table 841.114A) Temperture derating factor (from Table 841.116A)

Welded

ASME B 36.10

NPS

22

750

psig

100

0

F

S

52000

psig

c

4

MM

E

1

(E = 1, for seamless pipes)

F

0.5

T

1

(Client driven) (T = 1, for temperature at 2500F or less)

Pipe size

Outside diameter

t

c

tm

tm + (negative mill

(NPS) 1/2 3/4 1 1 1/4 1 1/2 2 3 4 6 8 10 12 14 16 18 20 22

(MM) 21.3 26.7 33.4 42.2 48.3 60.3 88.9 114.3 168.3 219.1 273 323.8 355.6 406.4 457.2 508 558.8

(MM) 0.31 0.39 0.48 0.61 0.70 0.87 1.28 1.65 2.43 3.16 3.94 4.67 5.13 5.86 6.59 7.33 8.06

(MM) 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00

(MM) 4.31 4.39 4.48 4.61 4.70 4.87 5.28 5.65 6.43 7.16 7.94 8.67 9.13 9.86 10.59 11.33 12.06

tolerance of 12.50 %) 4.92 5.01 5.12 5.27 5.37 5.57 6.04 6.46 7.35 8.18 9.07 9.91 10.43 11.27 12.11 12.95 13.78

Selected thickness,T (MM) NA NA NA NA NA NA NA NA 7.92 8.74 9.27 10.31 11.13 11.91 12.70 14.27 14.27

(Note 7) NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA ... ... ... ... Sch 40 Sch STD Sch 40 ... Sch 40 ... ... ... ... Sch XS ... ... ... ...

PAGE 8+4CALCULATIONS OF 6 THICKNESS AS PER ASME B31.8 REV

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DOCUMENT NO.

Notes : 1. Inputs to this sheet, are the Ivory coloured cells ie, - Pipe Material, - Design Pressure, - Design Temperature, - Specified minimum yield strength, - Corrosion allowance, - Longitubinal weld joint factor, - Design Factor, - Temperture derating factor. 2. Select ASME B 36.10 for carbon steel pipes and ASME B 36.19 for stainless steel pipes(for stainless steel pipes the third column in selected thickness shows "N A" as per the ASME B 36.19). 3. Select seamless for seamless pipes and welded for welded pipes. 4. This sheet gives thicknesses up to 20 NPS by default, for higher sizes the select the required size in the drop down menu against pipe size. 5. This sheet gives only schedule thickness for seamless pipes and MM thickness for welded pipes. 6. This sheet gives thicknesses for following sizes of carbon steel and stainless steel pipes, Carbon steel pipes (seamless) = from 1/2 to 48 NPS Carbon steel pipes (welded) = from 6 NPS to 80 NPS from 1/2 to 30 NPS = Stainless steel pipes (seamless and welded) 7. The column for selected Thickness gives MM thicknesses in the first column, corresponding Schedules Sch 40, 60, 80 etc in the second column and Sch XS, STD, XXS etc in the third columns as available.

PAGE 9+4CALCULATIONS OF 6 THICKNESS AS PER ASME B31.8 REV DOCUMENT NO.

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