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  1. OmarMuz

    Impact Test Exemption of Stiffener Ring Material, PQR & Welds

    yes the filler metals was tested by the manufacturer and found accepted "UCS-67(a)(3) when joining base metals exempt from impact testing by UCS-66(g) when the minimum design metal temperature is colder than −55°F (−48°C)." the confutation came from that our MDMT are -46°C and the...
  2. OmarMuz

    Impact Test Exemption of Stiffener Ring Material, PQR & Welds

    DekDee I'm not welding engineer, and your case is different as the stiffener ruing have other function david339933 yes, the impact was done for the filler metal and failed
  3. OmarMuz

    Impact Test Exemption of Stiffener Ring Material, PQR & Welds

    We have a mounded storage tank for LPG with capacity of 4000 m3. And the stiffener ring for the tank was welded with unapproved WPS and PQR. Since the PQR failed in charpy impact test at required MDMT of -46°C. Stiffener rings are impact testing exempted as per §UCS-68 (c) and §UCS-67 of ASME...

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