Hi Yong,
Actually the correct designation would be
ASME B16.5 Class 300 RFWN. There is no lb (pound) in the correct designation. However it is also important to list the bore diameter to ensure that it matches the pipe.
In my company we do the following:
There is a note on each piping drawing...
Rebel,
TBP, the first to answer, gave you the best advice. People are throwing formulas at you that are not based on reality. You should use the formula in ASME B31.1 for Power Piping and/or B31.3 for Chemical Plant and Refinery Piping. Each describes the hydrotest requirements as well. BUT...
Why not just give all required parties a copy of Bentley's Microstation Viewer (Bentley View). Have your CAD Administrator look into the steps required to acquire the free licenses.
I am of course assuming being a large corporation that all of your CAD drawings are on the network? Then when...