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Recent content by chowhk

  1. chowhk

    Minimum Preheat Temperature

    Same as the WPS, minimum preheat temperature -> 23 deg C (ambient). Q: If the metal (A106 Gr B, 10 mm thk) surface is 10 deg C (below the stated minimum preheat temperature in the WPS), can I weld using this WPS without preheat?
  2. chowhk

    Minimum Preheat Temperature

    Dear Sirs, I would like to seek your advise on below matter: I have a WPS/PQR (GTAW) states that the minimum temperature is 23 deg C. In ASME IX 406.1 says that: "A decrease of more than 55 deg C in the preheat temperature qualified. The minimum temperature for welding shall be specified in...
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