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  1. sziva

    ASME B31.1 Postweld Heat Treatment (PWHT)

    Hello All, I have some issues with the ASME B31.1 PWHT requirements. Issue: Table 132 contains the PWHT requirements based on material P-Nos (position) and Gr. Nos (grade). The P-No is clearly defined for each material in Mandatory Appendix A. For instance A335 P22 material's P-No. is 5A...

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