ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
(OP)
Question:
I am doing a demonstration vessel with 8" sch 80 pipe (1/2" wall), a 8" pipe cap and flange at opposite ends. I intend on putting a thread-o-let on the side of the vessel.
I have all my materials on hand and now I see in my design calc's that UW-16 (3)(a)(1) is limiting me to 3/8" maximum vessel wall.
I can't find where any additional calc's can be done to make this work. Can someone point me in the right direction? Or am I just plain hosed?
roadapple
I am doing a demonstration vessel with 8" sch 80 pipe (1/2" wall), a 8" pipe cap and flange at opposite ends. I intend on putting a thread-o-let on the side of the vessel.
I have all my materials on hand and now I see in my design calc's that UW-16 (3)(a)(1) is limiting me to 3/8" maximum vessel wall.
I can't find where any additional calc's can be done to make this work. Can someone point me in the right direction? Or am I just plain hosed?
roadapple





RE: ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
just play it safe and use a coupling and figure uw-16.1(z-1)
RE: ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
jt
RE: ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
I've only ever seen couplings used for small bore connections as recommended by vesselfab.
RE: ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
I have room to weld a coupling in the arrangement shown in UW-16.1 (i) - because my pipe is 8.625 od the curvature makes saddling the branch a real problem. I am trying to get away from machining an expensive part just to junk it at the end of the review.
RE: ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
I will be getting a coupling to do this with.
roadapple
RE: ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
the opening will be flat.
then stick what ever you want to weld in and use a full penetration weld.
RE: ASME Sect. 8 Div.1 thread-o-let and 1/2" pipe wall
The calculations for proving out the weld strength are shown in examples in Section VIII, Appendix L-7, but you will be much happier using the coupling with a standard UW-16 figure.
Your AIA should have advised you on what components to use for the demonstration.