ANSI/ASME B36.19M-1985 Schedule 40s tolerance on wall thickness and OD

[jlmammdgm]

What is the tolerance on wall thickness and OD for Schedule 40s pipe (stainless steel)?

 

[C2it]

Tolerance depends upon the manufacturing method and specifications governing the same. B36.19M does not specify any tolerances.

 

[jlmammdgm]

Thanks for information C2it.
I have to fit a part into a 2" BSP pipe Schedule 40s. I know the nominal wall thickness and OD but no idea what the tolerances are so cannot determine the minimum id of the pipe. I have no access to the 2" BSP pipe to measure it.
If I new what the tolerances were I could calculate minimum id. Don't what to give too large a margin for error or the part will end up being a very loose fit.

 

[racookpe1978]

Are you trying to fit a machined (round) part inside the (not-really-round) pipe inside "diameter" hole?

What are you allowing for the weld distortion of the pipe?

 

[gr2vessels]

ASME is mandating a -12.5% tolerance on the pressure pipe wall thickness, for strength calculations and that's what the manufacturers are working with. This -12.5% applies for all wall thicknesses.
Cheers,
gr2vessels

 

[EdStainless]

In general for this pipe size you could see OD +/-0.031" and a wall of +20%/-12.5% from nominal.
You can usually supply the heavier schedule (80 in place of 40) and not violate the tolerance

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube