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  • Users: Emely
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  1. Emely

    POST WELD HEAT TREATMENT [STRESS RELIEVING]

    Thanks a lot for your prompt and great answers! Now, it is confirmed. The auditor wanted us to do PWHT for all sizes.
  2. Emely

    POST WELD HEAT TREATMENT [STRESS RELIEVING]

    Good day! I have been struggling what temperature to use for our PWHT using stress relieving. I saw the definition of stress relieving which says that material is to be heat treated below its critical temperature. In Phase Diagram of Heat Treatment, critical temperature is 727 degrees celcius...
  3. Emely

    CLASS 2000 VS 3000 ASME B16.11

    Hello Experts I am designing a fitting which is 1/8" nps size. I used the formula for calculation: Sch=1000P/S Working pressure is 2000 psi and allowable stress is 13,300psi. I got 150sch (i used 160sch# based on table 2). But when i checked the dimensions in table 5, class 2000 and 3000 are...
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