Pound rating of 304 stainless steel fittings
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Everyone, I would like to ask: what is the pressure rating of those 304 stainless steel fittings that are commonly used in the market? 150lb? What are the corresponding standards? I tried to look for them but couldn’t find them, and I also couldn’t locate any standards for 150-pound grade stainless steel fittings abroad. I seek advice from experts.
They are available in various pound ratings; the pressure varies, as does the wall thickness. You can refer to the standards: ASME B16.5, B16.9, B16.11, B36.19M
The pressure rating of national standard pipe fittings is indicated in MPa.
Butt-welded pipe fittings generally do not have a pound rating. . . Unless within a specific standard. . . Sleeve fitting, threaded connections – explained. .
Butt-welded pipe fittings have their strength indicated by wall thickness, while socket-welded and threaded pipe fittings use pound ratings to indicate strength; this is different from flanges and valves. It’s best to determine the appropriate standard based on the specific requirements
Standard B16.5 primarily deals with forged steel flanges, and is not applicable to pipe fittings； B16.9 applies mainly to welded pipe fittings; as the friend below mentioned, the specification is determined by the wall thickness here ； B16.11 primarily deals with forged socket and threaded pipe fittings, but according to this standard, the lowest pressure rating for the fittings specified therein is 2000LB ； B16.3 in the American standards applies to cast socket and threaded fittings of 150lb and 300lb ratings, but I have not found any domestic or international fitting standards corresponding to the stainless steel equivalent ratings (150lb and 300lb). Such standards must exist, as the dimensional specifications of stainless steel fittings available on the market do not match any of the aforementioned standards.
They are available in various pound ratings; the pressure and wall thickness vary accordingly.
Engineering pressure class code per ASME standards: A – 150LB (2MPa)； B——300LB (5MPa) ； ..............
A-------G is used for ASME standard pressure class codes； H----Z is used for domestic standard pressure grade codes (where I, J, O, and X are not used)
One material can be used to make pipes of different weight ratings, with only the wall thickness varying