Unfortunately the existing flanges in the system are indeed 6" NPS socket welded flanges (not slip-on) and are stamped B16.5. Also, there are numerous manufacturers/suppliers out there that list "B16.5" 150# SW flanges greater than 3" NPS in their catalogs (see...
DSB123,
Thanks for stating the obvious. You have successfully grasped my problem.
- I have a system spec that calls for a flange size/type is not authorized by B16.5, yet there are numerous suppliers that provide these "B16.5" flanges and all appear to use the same dimensions for...
While I concur that a slip-on flange would be the better choice for this size, I have limited authority to "re-design" the system (spec calls for socket weld and not slip-on). I am working a job to replace a significant portion of the applicable system piping as a "repair".
I need some assistance in determining what guidance exists for B16.5 socket weld flanges greater than 3" NPS for military (navy) use. I'm dealing with a ship system diagram that calls for "B16.5 RF 150# SW" flanges for 2"-6" NPS sizes. B16.5 provides dimensions for socket depth for SW flanges...
