Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
(OP)
I have a pipe 6 "# 1500 but my Tien-in should do it on a # 2500 valve, the SCHD is the same for # 1500 and # 2500, you can either weld the flange directly to the pipe or I should relay transition by difference Thicknesses ??





RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
So yes, if the pipe is the same thickness as your ASME class 2500 flange / valve then you can weld it HOWEVER, the pressure rating of the system to which the class 2500 valve is welded to may not be the same maximum pressure rating as the flange / valve.
Now why you would want to use a higher pressure rated valve instead of a lower one is not clear.
It can be confusing in the long run to use higher rated flanges as then everyone thinks the entire system is good for class 2500 when it's not. Things like this get lost in the mists of time so mistakes can be made later.
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RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
By using thinner pipe or lower rated flanges you might be compromising the entire system downstream of this location.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
Also, LI is dead-on in his first post as well - my skin crawls a little when anyone refers to piping by ASME class rating. It's done, but it isn't correct - and leads people down wrong paths sometimes, IMO.
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
If there ever was one I doubt you have an up to date P&ID or line list to worry about.
How about what relief valves are there, trip settings etc?? I don't suppose this has gone through a MOC or HAZOP had it?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Weld Pipe # 1500 WITH A FLANGE # 2500 NEED TRANSITION OR WELD DIRECTLY?