Pipe Wall Minimum Thickness less than 1/16" when Threaded----ASME Section VIII Issue
Pipe Wall Minimum Thickness less than 1/16" when Threaded----ASME Section VIII Issue
(OP)
Hello All,
Long time looker, first time poster. I am running into an issue when using smaller diameter SCH 40 threaded pipe on ASME Section VIII Div 1 vessels. With wall thickness rather small for 1.5" and less pipes for SCH 40 when you add thread tolerance I get a wall thickness less than 1/16", which is not allowed per ASME for Section VII. Has anyone run into this issue before and have an explanation? Do I really need to upgrade all threaded connections on vessels to SCH 80?
Thanks!
Long time looker, first time poster. I am running into an issue when using smaller diameter SCH 40 threaded pipe on ASME Section VIII Div 1 vessels. With wall thickness rather small for 1.5" and less pipes for SCH 40 when you add thread tolerance I get a wall thickness less than 1/16", which is not allowed per ASME for Section VII. Has anyone run into this issue before and have an explanation? Do I really need to upgrade all threaded connections on vessels to SCH 80?
Thanks!





RE: Pipe Wall Minimum Thickness less than 1/16" when Threaded----ASME Section VIII Issue
RE: Pipe Wall Minimum Thickness less than 1/16" when Threaded----ASME Section VIII Issue
RE: Pipe Wall Minimum Thickness less than 1/16" when Threaded----ASME Section VIII Issue
It's kinda like the 45 degree bevel cut on a PSV tailpipe outlet. There's no science behind it but everybody does it because it's sacred tradition.
Sometimes you just got to go along to git along.