Plate & Frame ASME Stamp
Plate & Frame ASME Stamp
(OP)
I supplied a P&F Heat Exchanger that had to be ASME stamped. This exchanger is rated at 350 psig. The unit was supplied with an 'M' stamp (miniature).
The total internal volume is about 5 cubic feet. The size limit for an 'M' stamp is 3 cubic feet at 350 psig. The manufacturer stated that the P&F is actually considered two vessels, and each vessel would be 2.5 cubic feet in this heat exchanger and he is allowed, then, to use the 'M' stamp.
The end user has questioned this, and any input would be appreciates.
The total internal volume is about 5 cubic feet. The size limit for an 'M' stamp is 3 cubic feet at 350 psig. The manufacturer stated that the P&F is actually considered two vessels, and each vessel would be 2.5 cubic feet in this heat exchanger and he is allowed, then, to use the 'M' stamp.
The end user has questioned this, and any input would be appreciates.





RE: Plate & Frame ASME Stamp
I've never worked with P&F, but I imagine you would apply the same principle here.
It would be interesting to see other responses to your post.
RE: Plate & Frame ASME Stamp
On this basis, if that has any merit, it would logically seem that your Mfg'r should provide 2 stamps and nameplates.
But that doesn't make it right just because we do it.
rmw
RE: Plate & Frame ASME Stamp
Where would this exchanger be installed? Some jurisdictions do not recognize or accept the UM stamp.
RE: Plate & Frame ASME Stamp
Shell side and tube side count separately.
See also Interpretation VIII-1-89-203
jt
RE: Plate & Frame ASME Stamp
RE: Plate & Frame ASME Stamp
Reply (1): Yes "
I would challenge the interpretation. UM stamp 's for a single chamber vessel. I see many Mfrs deviations and get away with it.
someone in that Committee mfrs HXs, insiderrr
RE: Plate & Frame ASME Stamp
I can use the interpretation.
'sorry about the above