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ASME B31.1 Postweld Heat Treatment (PWHT)
Now it is clear. The P-No and Group definition is described in ASME BPVC Section IX, section QW-420. Thanks a lot!- sziva
- Post #6
- Forum: ASME (mechanical) Code Issues
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ASME B31.1 Postweld Heat Treatment (PWHT)
Thanks Weldstan. The attachment clearly shows, that P91 is P No. 5B. Even if it would be 15E, as you stated. How does the grade number come into the picture in terms of PWHT?- sziva
- Post #3
- Forum: ASME (mechanical) Code Issues
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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...- sziva
- Thread
- Replies: 6
- Forum: ASME (mechanical) Code Issues
