PWHT on in-service pressurized line

  • Heat Treatment (PWHT)

    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 2 years, 11 months ago 2 Members · 1 Reply
  • 1 Reply
  • 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

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