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wall thickness calculation

wall thickness calculation

wall thickness calculation

(OP)
Hello all,

I want to calculate the wall thickness of 48" R=5D induction bend for onshore pipelines. (hot bend)

Is the procedure same as calculating w.t. of straight pipe acc. to B31.3?  

In the standard there are som argument about SIF. Is the wall thickness of hot bends is related with SIF.

Thanks in advance.

RE: wall thickness calculation

Shouldn't you be using the equations in ASME B31.4 or B31.8 to calculate the wall thicknesses for pipelines?

NozzleTwister
Houston, Texas

RE: wall thickness calculation

Be sure to take a look at the backwall thinning associated with pipe bending.

You might check the International Pipe Association Voluntary Bending Standard (IPA VIBS-86).  It gives some recommendations about calculating the wall thickness for induction bends.

RE: wall thickness calculation

Is there any problem with the para. 304.2.1 Pipe Bends in B31.3?

RE: wall thickness calculation

(OP)
I am using B31.4 for calculation. it says use 75% of allowable stress for wall thickness calculation. Is it  enough for calculation.

Should I do something about SIF.

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