PWHT on in-service pressurized line

  • PWHT on in-service pressurized line

    Posted by arsal on 27/11/2021 at 2:09 pm

    how to perform PWHT on in-service welding (hot tapping) / Pressurized line (live line)
    material: CS nace
    fluid service is : stripped water, Flare, Amine

    lucas replied 5 months, 2 weeks ago 2 Members · 1 Reply
  • 1 Reply
  • Heat Treatment (PWHT)


    27/11/2021 at 10:19 pm
    2 Points

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