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Minimum PWHT cycles for piping

Cormet

Petroleum
Joined
Jul 3, 2007
Messages
11
Location
US
This just came in.....

low Cr piping welding (1¼Cr, 2¼Cr, 5Cr and 9Cr), We need two minimum PWHT cycles

Is this a code requirement from B31.3???

Thanks,
 

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