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Recent content by tpeck

  1. tpeck

    Excessive hardness on 9 Chrome Pipe Welds

    The material is 5" sched 40 (.258"), 1375 deg F +- 25, 2 hour hold.
  2. tpeck

    Excessive hardness on 9 Chrome Pipe Welds

    Have welded piping 9 chrome using electric preheat to contol and monitor interpass temperatures with approved and demonstated weld procedure. Many hardness readings after PWHT are in excess of Code allowable of 241 BHN. All the obvious variables have been checked, ie materials & welds PMI'd as...
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