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  1. gabry1

    Welding of P91 valves to P91 piping: removal of internal components

    Hi everyone. I'd like some help with the following: In case of welding of P91 gate valves to P91 piping is it recommended to remove the internal components (bearings, gasket,...) due to the high temperature reached during the PWHT at 755 Celsius ? I don't have any details of the maximum...

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