?ncreased wall tickness according to ansi/asme b31.8

[baranhalis]

Hello to everybody, I need to calculate the increased wall tickness for a line pipe and I need the formula for that. Can anyone give me an equation or direct me a website where I can find info, I really appreciate iT. Thanks

 

[metengr]

Use Barlow's formula;

Hoop stress = [Pressure x outer pipe diameter]/[2 x wall thickness]

 

[baranhalis]

thank you vey much. is this the formula in the ansi/asme b31.8. I am sorry ? am not very familiar with the concept

 

[metengr]

yes

 

[NozzleTwister]

baranhalis,

Actually, metengr is not completely correct, there's more to it than that.

The following factors are also included in the equation:

Temperature Derating
Longitudinal Joint Factor
Design Factor

Get yourself a copy of B31.8 and refer to paragraph 841.11, Steel Pipe Design Formula. The complete formula is here as well as direction where to get the values for your factors.


NozzleTwister
Houston, Texas

 

[baranhalis]

thanks alot friends