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ASME Section III-D PWHT/NDE question
Most Codes allow RTs either before or after PWTH. I typically opt for after PWHT since the PWHT may have relieved stresses to the point of initiating a crack. However, at the temperature you are using I cannot imagine that this would be an issue, so prior to PWHT would be fully acceptable...- Kerhin
- Post #3
- Forum: Boiler and Pressure Vessel engineering
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Hydrogen Bake-Out???
Scott, we use a post weld hydrogen bake out when performing weld repairs with the temper bead process. We use this controled welding process to avoid PWHT on components that would be adversely affected by a high temperature PWHT. The ASME Section XI requirement is 450-550 deg. F for a minimum...- Kerhin
- Post #6
- Forum: Metal and Metallurgy engineering
