Large thread data
Large thread data
(OP)
I want to use a UNC thread for part of my design of a pressure test rig. I can not find any information on the internet or in Machinery's Handbook regarding thread sizes greater than 6 inch.
I can't really use 6" as the OD of the pipe is 6.9" and I would loose to much strength by dropping down to this smaller OD, even just for a thread.
Can you get UN threads greater than 6"? I need to calculate tensile stress area and thread stripping areas. I need to protect against a worse case load of 215k psi.
Should I consider other thread types?
Any help greatly appreciated,
Cheers
Phil.
I can't really use 6" as the OD of the pipe is 6.9" and I would loose to much strength by dropping down to this smaller OD, even just for a thread.
Can you get UN threads greater than 6"? I need to calculate tensile stress area and thread stripping areas. I need to protect against a worse case load of 215k psi.
Should I consider other thread types?
Any help greatly appreciated,
Cheers
Phil.





RE: Large thread data
ASME Y14.6 has Screw and Thread Representation, but this is mostly how to show it on drawings.
Other thread types to look into that are more often large size would be ACME, SQUARE, and BUTTRESS which are commonly referred to as Power Screws.
RE: Large thread data