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  1. janie86

    The compressed spring used in cryogenic temperature

    Hi, Fig 1 Link Fig.2 Link
  2. janie86

    The compressed spring used in cryogenic temperature

    Hi, In normal temperature, the spring is compressed to △L2; But in cryogenic temperature, due to dimensions shrinkage (the length of spring shrink, and both ends of the dimensions of components shrink), the pre-compression is reduced (up to △L1),at this time, the reducing range of output force...
  3. janie86

    The Pre-tightening Force of Flange Bolting for API Valve

    In API 6A-20th, the appendix D indicates the pre-tightening force of flange bolting is the half of material minimum specified yield strength. 1. For the specified value in appendix D,does it mean the pre-tightening force of flange bolting in API 6A must be the half of the yield strength of the...
  4. janie86

    How to calculate the flange bolts which are subjected to piping mechanical loads

    When calculate the flange bolts of side entry ball valve, according to ASME B16.34, Valves with bodies of sectional construction such that bolted or threaded body joints are subjected to piping mechanical loads, as a minimum, shall satisfy the following bolt cross-sectional area requirement...

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