Limits of Reinforcement
Limits of Reinforcement
(OP)
Is it permissible under code (VIII-1) to consider material (over and above the thickness required to resist pressure) in threaded (NPT) fittings as having reinforcing value? I could not conclusively decide one way or the other after reading UG-43.
Thanks in advance to the forum for your feedback!
Thanks in advance to the forum for your feedback!





RE: Limits of Reinforcement
If you are attaching a threaded connection to a vessel wall such as by welding, then any thickness above that required for pressure and with allowances for corrosion and threading may be counted as reinforcement.
Regards,
Mike
RE: Limits of Reinforcement
The nozzle that goes on the opening has a NPT (tapered) thread. so no welding is necessary - the pipe threads would be installed with PTFE tape.
My question is, for such an unwelded construction, would extra material in the nozzle count as having reinforcing value?
Thanks!
RE: Limits of Reinforcement
The threaded attachment you call nozzle is not part of the vessel, hence the thickness of the fitting is irrelevant to the vessel reinforcement (ie the extra material in the nozzle counts only for the fitting minimum thickness and has nothing to do with the vessel reinforcement). The properly attached fitting refers to a welded attachment on the shell to accommodate the required length of thread.
Cheers,
gr2vessels
RE: Limits of Reinforcement
RE: Limits of Reinforcement