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Pressure vessel nozzles
2

Pressure vessel nozzles

Pressure vessel nozzles

(OP)
Can anyone please tell me what the RFBF stands for when specifying a 3000 # RFBF nozzle?

RE: Pressure vessel nozzles

One guess is "Raised Face Blind Flange"

Regards,

Mike

RE: Pressure vessel nozzles

The 3000# flanges refer API 6A) may have machined back face, called back facing, as alternative to spot facing of the bolt hole. I suspect that the back facing is specified in this case. However, I cannot exclude explanation provided by SnTMan.
Cheers,
gr2vessels

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