Dear Friends,
i need correct interperation of the Clause of mentioned below.
thanks and regards
QW-407.2
A change in the postweld heat treatment(see QW-407.1) temperature and time range
The procedure qualification test shall be subjected to
PWHT essentially equivalent to that encountered in the
fabrication of production welds, including at least 80% of
the aggregate times at temperature(s). The PWHT total
time(s) at temperature(s) may be applied in one heating
cycle
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