Flanges
Flanges
(OP)
Hey guys, new here on the forum.
Stupid question, if possible, how can I connect a 125lbs FF flange to a 150lbs flange. I've checked and the PCD don't match?
Please advise
Thank you
Stupid question, if possible, how can I connect a 125lbs FF flange to a 150lbs flange. I've checked and the PCD don't match?
Please advise
Thank you





RE: Flanges
RE: Flanges
RE: Flanges
I agree with CRG. The bolt circle, number and size of bolt holes should be the same. Please double check and let us know what you find.
You also need to take into consideration that you're connecting dissimiliar materials (possibly cast iron and forged steel) and should follow the rules for doing so (ref ASME B16.5, sect 5.3.5). If, in fact, it is cast iron and steel, specify the class 150 flange to have a flat face and use a full face gasket to prevent cracking the brittle class 125 flange.
One last thing. Try to get into the habit of properly describing flanges as "class 150" versus "150 lb" or "150#".
donf
RE: Flanges
Johnny Pellin