Why can’t we use the PRESSURE CHANGE TEST in ASME Section V for leak testing B31.3 piping?

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ASME B31.3 does not permit the use of an “ASME Section V Pressure Change Test” as a substitute for the mandatory leak testing requirements (hydrostatic, pneumatic, or initial service leak test) defined in Chapter VI of the B31.3 Code.

Why It Cannot Be Used as a Substitute:

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