B31.3, 4 or 8 inside Pipeline Stations
B31.3, 4 or 8 inside Pipeline Stations
(OP)
Just in case you need it and missed it over on the ASME Forum, I have obtained PHMSA clarification as to using B31.3 inside "pipeline stations"
http://www.eng-tips.com/viewthread.cfm?qid=376163
http://www.eng-tips.com/viewthread.cfm?qid=376163






RE: B31.3, 4 or 8 inside Pipeline Stations
It would be interesting to know whether 31.3 is actually used more prevantly as in most case it would be thicker pipe and more conservative.
Also inside the plant does everyone revert to grade B so that you can use standard A216 flanges?
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: B31.3, 4 or 8 inside Pipeline Stations
Why would you want to design something to a code that the regulators ("subject matter experts - technical authority - penalty assessors") in the country of origin say it is the wrong code to be using?
You can use ASME B16.5, B16.47 or MMS SP-44 flanges per B31.4 P)404.4.2 & 4
Steel butt weld fittings 404.2.5 & 404.3.2 use ASME B16.9 & B16.28 or MSS SP-75
They are available in High Test WPHY = 60, Y65, Y70 ... to match your API 5L X-Grade of your pipe.
MSS specifies the materials allowed as well.
RE: B31.3, 4 or 8 inside Pipeline Stations
Fabricated tees and crosses,
404.3.6 has something to say about reinforcement of Reinforcement of Multiple Openings and "adjacent branches".
RE: B31.3, 4 or 8 inside Pipeline Stations