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  1. sw008

    Low Temperature Carbon Steel

    ASME VIII Div.1 is used for the vessel design. If the MDMT is colder than -29 DegC and warmer than -46 DegC, Low Temperature Carbon Steel is selected, for example, SA516-70N. My questions: (1) Is impact test required when MDMT colder than -29 DegC? Or dependS on UCS-66? (In ASME VIII Div.1...
  2. sw008

    welding procedure qualification

    weldtek, If I change the PQR and WPS base metals as follow: PQR: P1-Group 2 TO P1-Group 2 WPS: P1-Group 1 TO P1-Group 2 Can I use this PQR to support the WPS (Impact test required)? thanks
  3. sw008

    welding procedure qualification

    weldtek, I found the following in ASME IX QW-403.5. Is it the same as what you mentioned dual certificate? "In addition, when base metals of two different P-Number Group Number combinations are qualified using a single test coupon, that coupon qualifies the welding of those two P-Number Group...
  4. sw008

    welding procedure qualification

    Guys, please offer your suggestion. Base metal in PQR: P1-Group 1 TO P1-Group 2 Base metal in WPS: P1-Group 2 TO P1-Group 2 Welding process: SMAW Impact test is required. Can I use the above mentionen PQR to support this WPS, if I use ASME IX? For my understanding, in ASME IX, PQR base...

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