Do you agree for rigid flange test pressure as per B16.5 recommendations, pipe 20"-STD-D.P=225psig Temp=575F hydrotest pressure=1125 psig.

Do you agree with hydrotest pressure..Its does not make sense to me right.

300# flange test pressure 1125 psig its OK as per B16.5 recommendation, but this does not apply to pipe right for hydro test pressure to consider in pipe.

how many of you follow ASME B31.3.... 345.4.2 Test pressure formula PT=1.5PSt/S as hydero Test pressure.