PN rating flanges
PN rating flanges
(OP)
Dear Seniors,
For pressure and temperature ratings of valves we refer ASME B 16.5. In this standard it was very clearly stated at what pressure and temperature what rating of flanges shall be used.
The same way now I am using PN6 rating valve. Which code I have to refer for temperature rating for this valve. Whether we can follow ASME B 16.5 for this PN6 rating ?
Regards
Srinivas
For pressure and temperature ratings of valves we refer ASME B 16.5. In this standard it was very clearly stated at what pressure and temperature what rating of flanges shall be used.
The same way now I am using PN6 rating valve. Which code I have to refer for temperature rating for this valve. Whether we can follow ASME B 16.5 for this PN6 rating ?
Regards
Srinivas





RE: PN rating flanges
RE: PN rating flanges
No, For pressure ratings of valves you refer to ASME B 16.34. Whilst for flanged valves the temperature pressure ratings and material groups appear to be identical (I didn't do a line by line check), B 16.34 has higher ratings for "Special Class" valves which are welded or threaded.
Like XL83NL says, look at your valve code first.
No you cannot use B 16.5 for PN rated flanges.
It doesn't look like there is an EN code for valves, but ISO or US ones. However if the flange ends p being the weakest part, then it governs the temperature / pressure rating of your PN rated valve with PN rated flanges.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: PN rating flanges
I would say that it is safe to assume that if you use EN 1092-1 and verify the flange data, you will be okay.
RE: PN rating flanges