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  • Users: ags1
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  1. ags1

    Temperature limiation for using external pressure charts

    UG-20 (c) states ""design temperatures for vessels under external pressure shall not exceed the maximum temperatures given on the external pressure charts." Sec IID,Appendix-3,Fig-3-500.1 shows the temperature limitation for each material for the actual r/t ratio. For my case I have material...
  2. ags1

    Mechanical property for carbon steel operating in creep range 565°C~650°C

    Need to evaluate creep damage in carbon steel (SA 516 Gr 70/SA 106 Gr B) at 650°C short term exposure (~150Hrs@ 650°C, balance life@ 565°C in total life of 100000 Hr).ASME IID gives allowable stresses up to 550°C but doesn't permit use beyond 538°C. Similarly thruogh API 579 FFS-1, table F.2...

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