Dear all,
-- As old ASME B31.3-2012 we know it was above 19mm req pwht,
now i read ASME B31.3-2014,little confused me with pwht exemption and pwht requirements and control thickenss 331.1.3?
q1- what is thik req for pwht for P1 as per b31.3 2014 ?
q2 : for P1,mentioned more than 25mm thk and 95C preheat exemption from pwht so less than 25mm not require pwht ?
regards,
mohd.
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