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  1. BE1980

    Compressor Head

    Hi there, I have a question regarding compressor head. Is it accurate to state that Head is defined as the amount of energy it takes to compress a mass of gas from a certain suction pressure to a certain discharge pressure? I know that, for a fixed discharge pressure and compressor speed, if...
  2. BE1980

    Surface Area of a Vessel

    Hi there, Does anyone know how to calculate the wetted surface area of a partially filled horizontal vessel with elliptical heads i.e. not hemispherical ends? Your help would be appreciated.
  3. BE1980

    Cubical Expansion Coefficient for Themal Expansion Calculations

    I agree that the thermal relief rate will not drastically affect valve sizing. However, the required relief rate is directly proportional to the cubical expansion coefficient. Q = (B*H)/(500*G*C) API 521 where Q= Thermal relief rate, B = cubical expansion coefficient, H= heat transfer rate...
  4. BE1980

    Cubical Expansion Coefficient for Themal Expansion Calculations

    I am currently sizing a PSV which is situated on the discharge of a heat exchanger. The relieving fluid is cooling medium i.e. 75%potable water/25% MEG. Based on API standards, I have sized a rupture disc to prevent against tube rupture and process gas breakthrough. Therefore,the only credible...

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