Is there a difference between the two
Is there a difference between the two
(OP)
I'm reviewing a fabrication drawing and it is calling for 2"-3000# couplings and 4" API couplings. I was wondering why the 4" is not called out as a 3000# designation? Is there a difference between the two and if so what?





RE: Is there a difference between the two
http://www.bonneyforge.com/resources/FSFU.pdf
I've no real idea what an "API coupling" is. This is rather vague (at least to me).
API what?
Pressure rating?
Type?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Is there a difference between the two
The different pressure rating for 2" and 4" fitting may come from the different standards, such as ANSI vs API.