Thickness Calculations as Per ASME B 31.3, 31.4 and 31.8

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Design code ASME B31.3 Pipe thickness

Minimum thickness of pipe selected, T >= = t + c Pressure design thickness, t = PD

2(SEW+PY)

Piping spec Pipe details

Pipe material ASTM A 105

Pipe size (outside diameter) D NPS

Design Pressure P 600 psig

Design Temperature T 100

S 20000 psig

Corrosion allowance c 2 MM

E 1 (E = 1, for seamless pipes)

Coefficient (from Table 304.1.1) Y 0.4

W 1

Pipe size Outside diameter t c Selected thickness,T (NPS) (MM) (MM) (MM) (MM) (MM) (Note 7) 1/2 21.3 0.32 2.00 2.32 2.65 2.77 Sch 40 Sch STD 3/4 26.7 0.40 2.00 2.40 2.74 2.87 Sch 40 Sch STD 1 33.4 0.50 2.00 2.50 2.85 2.90 Sch 30 ... 1 1/4 42.2 0.63 2.00 2.63 3.00 3.56 Sch 40 Sch STD 1 1/2 48.3 0.72 2.00 2.72 3.11 3.18 Sch 30 ... 2 60.3 0.90 2.00 2.90 3.31 3.91 Sch 40 Sch STD 3 88.9 1.33 2.00 3.33 3.80 4.78 Sch 30 ... 4 114.3 1.70 2.00 3.70 4.23 4.78 Sch 30 ... 6 168.3 2.51 2.00 4.51 5.15 7.11 Sch 40 Sch STD 8 219.1 3.27 2.00 5.27 6.02 6.35 Sch 20 ... 10 273 4.07 2.00 6.07 6.94 7.80 Sch 30 ... 12 323.8 4.83 2.00 6.83 7.80 8.38 Sch 30 ... 14 355.6 5.30 2.00 7.30 8.35 9.53 Sch 30 Sch STD 16 406.4 6.06 2.00 8.06 9.21 9.53 Sch 30 Sch STD 18 457.2 6.82 2.00 8.82 10.08 11.13 Sch 30 ... 20 508 7.57 2.00 9.57 10.94 12.70 Sch 30 Sch XS 48 1219.2 18.18 2.00 20.18 23.06 N A #N/A #N/A

t_m + manufacturer's minus tolerance(12.5%) Minimum required thickness, t_m

0_F

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

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

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

Weld joint strength reduction factor,

per para 302.3.5 (e) (W = 1, for Temperatures at 9500_{F and below)}

t_m t_m + (negative mill tolerance of 12.50 %)

Seamless ASME B 36.10

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THICKNESS CALCULATIONS AS PER

ASME B 31.3

Notes :

1. Inputs to this sheet, are the Ivory coloured cells ie, - Design Pressure,

- Design Temperature,

- Basic allowable stress in tension at design temperature, - Corrosion allowance,

- Longitubinal weld joint factor, - Coefficient,

- Weld joint strength reduction factor.

3. Select seamless for seamless pipes and welded for welded pipes.

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

- Pipe Material,

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).

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.

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.

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Design code ASME B31.4

Pipe thickness

Minimum thickness of pipe selected, T >= = 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

Design Temperature 100

40000 psig

Corrosion allowance c 1.6 MM

Design Factor F 0.5 (Client driven, F <= 0.72)

Pipe size Outside diameter t c Selected thickness,T (NPS) (MM) (MM) (MM) (MM) (MM) (Note 7) 1/2 21.3 1.97 1.60 3.57 4.08 4.78 Sch 160 ... 3/4 26.7 2.47 1.60 4.07 4.65 5.56 Sch 160 ... 1 33.4 3.09 1.60 4.69 5.36 6.35 Sch 160 ... 1 1/4 42.2 3.90 1.60 5.50 6.29 6.35 Sch 160 ... 1 1/2 48.3 4.47 1.60 6.07 6.93 7.14 Sch 160 ... 2 60.3 5.57 1.60 7.17 8.20 8.74 Sch 160 ... 3 88.9 8.22 1.60 9.82 11.22 15.24 ... Sch XXS 4 114.3 10.57 1.60 12.17 13.91 17.12 ... Sch XXS 6 168.3 15.56 1.60 17.16 19.61 21.95 ... Sch XXS 8 219.1 20.26 1.60 21.86 24.98 N A #N/A #N/A 10 273 25.24 1.60 26.84 30.67 N A #N/A #N/A 12 323.8 29.94 1.60 31.54 36.04 N A #N/A #N/A 14 355.6 32.88 1.60 34.48 39.40 N A #N/A #N/A 16 406.4 37.57 1.60 39.17 44.77 N A #N/A #N/A 18 457.2 42.27 1.60 43.87 50.14 N A #N/A #N/A 20 508 46.96 1.60 48.56 55.50 N A #N/A #N/A 24 609.6 56.36 1.60 57.96 66.24 N A #N/A #N/A

THICKNESS CALCULATIONS AS PER

ASME B31.4

0_F

Specified minimum yield strength (from Appendix D)

Longitudinal weld joint factor (form Table 402.4.3)

Seamless ASME B 36.10

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Notes :

- Specified minimum yield strength, - Corrosion allowance,

- Longitubinal weld joint factor, - Design Factor,

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THICKNESS CALCULATIONS AS PER

ASME B31.4

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Design code ASME B31.8 Pipe thickness

Minimum thickness of pipe selected, T >= = t + c

Pressure design thickness, t = PD 2S(FET)

Piping spec Pipe details

Pipe material ASTM A 106 Gr B

Design Temperature 100

S 52000 psig

Corrosion allowance c 4 MM

Design Factor (from Table 841.114A) F 0.5 (Client driven)

T 1

Pipe size Outside diameter t c Selected thickness,T (NPS) (MM) (MM) (MM) (MM) (MM) (Note 7) 1/2 21.3 0.31 4.00 4.31 4.92 N A N A N A 3/4 26.7 0.39 4.00 4.39 5.01 N A N A N A 1 33.4 0.48 4.00 4.48 5.12 N A N A N A 1 1/4 42.2 0.61 4.00 4.61 5.27 N A N A N A 1 1/2 48.3 0.70 4.00 4.70 5.37 N A N A N A 2 60.3 0.87 4.00 4.87 5.57 N A N A N A 3 88.9 1.28 4.00 5.28 6.04 N A N A N A 4 114.3 1.65 4.00 5.65 6.46 N A N A N A 6 168.3 2.43 4.00 6.43 7.35 7.92 ... ... 8 219.1 3.16 4.00 7.16 8.18 8.74 ... ... 10 273 3.94 4.00 7.94 9.07 9.27 Sch 40 Sch STD 12 323.8 4.67 4.00 8.67 9.91 10.31 Sch 40 ... 14 355.6 5.13 4.00 9.13 10.43 11.13 Sch 40 ... 16 406.4 5.86 4.00 9.86 11.27 11.91 ... ... 18 457.2 6.59 4.00 10.59 12.11 12.70 ... Sch XS 20 508 7.33 4.00 11.33 12.95 14.27 ... ... 22 558.8 8.06 4.00 12.06 13.78 14.27 ... ...

0_F

Specified minimum yield strength (from Appendix D)

Longitudinal weld joint factor (form Table 841.115A)

Temperture derating factor (from

Table 841.116A) (T = 1, for temperature at 2500_{F or less)}

Welded ASME B 36.10

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THICKNESS CALCULATIONS AS PER

ASME B31.8

Notes :

- Specified minimum yield strength, - Corrosion allowance,

- Longitubinal weld joint factor, - Design Factor,

- Temperture derating factor.

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