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  1. ahp54

    PWHT for API 650 Nozzles?

    As per API 650 requirements ,it is required to PWHT nozzles as the thickness of shell exceeds 1/2 inch and material group IV,my questions: 1 What is the idea behind prohibiting PWHT on tank after erection on tank? 2 Is it required to perform PWHT only in a furnace or we can perform it with...

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