B16.5 150# socket weld flanges greater than 3" NPS
B16.5 150# socket weld flanges greater than 3" NPS
(OP)
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 up to 3" NPS but not greater. Various suppliers show socket depths for SW flanges greater than 3" but what is that based on?





RE: B16.5 150# socket weld flanges greater than 3" NPS
I think you should be opting for slip-on flanges for sizes above 2"nb. Socket weld flanges are generally not used above 2"nb.
RE: B16.5 150# socket weld flanges greater than 3" NPS
RE: B16.5 150# socket weld flanges greater than 3" NPS
If the sizes are not in B16.5 what does that indicate???
RE: B16.5 150# socket weld flanges greater than 3" NPS
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 socket depths on flanges greater than 3" NPS. Which brings me back to my original question. What is the basis for these dimensions?
- What I am trying to find is some sort of spec/letter/whatever (perhaps US Navy specific) that defines the dimensions and/or authorizes the use of these flanges which are outside of B16.5 specs. To date I have been unable to locate anything and that leaves me between a rock and a hard place.
RE: B16.5 150# socket weld flanges greater than 3" NPS
Have you grasped the answer though. "B16.5" flanges do not come in socket weld for sizes greater than what is designated in B16.5. Therefore your suppliers cannot call them B16.5 flanges if they are not in the Code.
RE: B16.5 150# socket weld flanges greater than 3" NPS
RE: B16.5 150# socket weld flanges greater than 3" NPS
field welder only ''socketweld'' only on the outside.
RE: B16.5 150# socket weld flanges greater than 3" NPS
RE: B16.5 150# socket weld flanges greater than 3" NPS
Some shops machine to larger bore if ordered.
the B16.5 is there but look at the reading/stamping, it may should be a weldneck flange machined to socketweld.
If you are not bound to ASME, you could have it machined and you're home free.
genblr
RE: B16.5 150# socket weld flanges greater than 3" NPS
wrong hub shape
normally it would be a hubbed blind flange bored and counterbored
RE: B16.5 150# socket weld flanges greater than 3" NPS