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.


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.