Interruption of welding

  • For <= 25mm, minimum of two weld passes entire the weld length (root and hot pass).
  • For > 25mm, minimum of three weld passes entire the weld length.

Note: Prior to the recommencement of welding, the joint will be subjected to the same preheat temperature as specified WPS.

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Hi Mr. Bien,
Regard to Asme B31.3 para 330.2.2 interruption of welding mention :
"A minimum of at least 10 mm (3⁄8 in.) thickness of weld is deposited or 25% of the welding groove is filled, whichever is less"

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Thanks, preheating requirement also apply.