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  1. twentythree

    lowered allowable stress value

    Hi, there is such a footnote mentioning to use 0.8 of the allowable stress, but did not elaborate further on the basis. My guess was could it be as a criteria to exempt for impact testing? Appreciate if someone could shed some light.
  2. twentythree

    lowered allowable stress value

    Hi All, I'm new in HEX design and would like to get some advice. I was reviewing a heat exchanger and notice that a modified/lowered allowable stress figure was used in the minimum thickness calculation for some of the components. It is for a shell & tube heat exchanger. Example: Component...

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