Pipe wall thickness calculation method for t≥D/6 or for P/SE>0.385

• Jun 15, 2025

• #2

1503-44

Petroleum

Jul 15, 2019

6,704

ES

 

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• Jun 15, 2025

• #3

GD2

Mechanical

Sep 25, 2017

724

CA

A comparable analogy can be found in ASME Sec VIII Div 1 Mandatory Appendix 1 for Cylindrical Shell.

 

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• Jun 16, 2025

• #4

goutam_freelance

Mechanical

Jan 25, 2003

655

IN

You can try to use Sec VIII Div 3 which caters to high pressures. Even though piping is outside its scope, it is permitted to design as per this code and get a U3 stamp if necessary.

Even though formulae for stresses in thick walled cylinders are available, the complications will arise due to the following:

1. Steady thermal stresses due to unequal temperatures between inside and outside surfaces.
2. Unsteady thermal stresses during heating or cooling and the resulting stress cycles contributing to fatigue.
3. The allowable stress(which failure theory to use etc.)

 

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• Jun 20, 2025

• Thread starter
• #5

S

Sean_Wei

Mechanical

Jan 25, 2025

13

Finally VIII-1 mandatory-1 is used to calculate the thick wall pipe，thanks a lot

 

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• Jun 20, 2025

• #6

goutam_freelance

Mechanical

Jan 25, 2003

655

IN

Sean_Wei said:

Finally VIII-1 mandatory-1 is used to calculate the thick wall pipe

Click to expand...

A caveat; pipes are not in scope of VIII-1. Special considerations of stress ranges, fatigue etc. will be necessary as per B31.1.

 

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