Reply To: PWHT on in-service pressurized line

  • Heat Treatment (PWHT)

    lucas

    Member
    27/11/2021 at 10:19 pm

    API 2201 code does not recommend to carryout PWHT on pressurized lines (Live lines).
    but as per API 510 Para 8.1.7.4.3 is recommended Preheat or Controlled-deposition Welding (CDW) Methods as Alternatives to PWHT.
    but need more clarification to perform PWHT