When we check the standard flanges for external pipe load, 150# flange will always fail in gasket seating condition if Gasket is SPWD.

Since interpretation no. BPV VIII-1-16-85 does not says that we have to check flange for Gasket seating condition; can we consider m=0 & y=0 value just to prove that flange is safe for external pipe loading.

Regards,
Rajendra