Connecting API pipes with API 6A (Type 6BX) Flanges
Connecting API pipes with API 6A (Type 6BX) Flanges
(OP)
Hi,
I am trying to connect a 6" SCHXXS, X65 pipe with an API 6A(Type 6BX) Weld Neck Flanges. Could anybody suggest what size of the flange I should be using as the dimension for the pipe and flange are of 2 different standards.
Cheers





RE: Connecting API pipes with API 6A (Type 6BX) Flanges
Basically the API 6A sizes have reduced bore to match standard ASME pipe sizes, therefore a API 6A 7 1/16" flange will actually mate to an ASME 6" (6.625" OD) pipe.
Traditionally the wellhead flanges mostly mated directly to other flanges without this pesky pipe in between.
As in all things, check the details of the inner bore, but usually you can get the flanges machined to match the pipe unless something is seriously being de-rated.
Remember - More details = better answers
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RE: Connecting API pipes with API 6A (Type 6BX) Flanges
Thanks LittleInch for your kind reply. Appreciate it very much. Now we are looking at the 5.1/8" API 6A (6BX), 10,000psi to see we can machine the flange to fit to the 6" SCHXXS API pipe.
Cheers
RE: Connecting API pipes with API 6A (Type 6BX) Flanges
Just to be clearer, it would seem that above API 5000, the connecting pipe is not a standard ASME size pipe.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Connecting API pipes with API 6A (Type 6BX) Flanges
RE: Connecting API pipes with API 6A (Type 6BX) Flanges
See this http://www.woodcousa.com/about_wnf.htm and scroll down to about half way (the 6th section drawing) The 1:4 referred to is the slope of the angle as shown on the drawing in the website attached.
I am kinda worried that you're asking these sorts of very basic questions about high pressure piping. Is there someone else in your company / location checking and signing off your designs??
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.