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  1. johnick

    Impact testing

    Thanks eliebl & SnTMan for these replies I now understand what I have to do for MDMT for our vessel. Thanks.
  2. johnick

    Impact testing

    teokal, vessel is for use in China.
  3. johnick

    Impact testing

    I have reviewed UCS-65 & 66 but take these to be for low temperature operation. UG-20(f)(3) would seem to put a limit on the temperature range of -29ºC to 345ºC. outside which impacts are required. Our upper design temperature is 350ºC.
  4. johnick

    Impact testing

    Thanks for reply. Vessel is a steam distribution header operating at ambient up to 350ºC. Pipe wall thickness is Sch.40 (10.3mm). Low temperature operation is not a consideration. I am trying to establish what if any requirements are for operating at this temperature as UG -20 mentions upper...
  5. johnick

    Impact testing

    ASME UG 20(f) (3)impact testing is not mandatory between -29ºC & 345ºC. Is there an exemption to mandatory test above 345ºC? We have a vessel of design pressure of 2.77MPa & design temp of 350ºC. Material grade for shell & nozzles is ASTM A106B.

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