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  1. MMII

    API537: flare

    Thanks TD2K, but the 2008 edition was for ISO 25457 2nd edition, that is based on API Std 537.
  2. MMII

    API537: flare

    hi!! Anyone know if there has been a new edition of API537 after the first one in sept. 2003? Thanks
  3. MMII

    Crude dehydration

    Anybody knows which are the P/T conditions for an adequate crude dehydration? I need bibliography where to find that info.
  4. MMII

    Piping inlet loss on PSVs on long header

    Ammonianeer, what is clear is that the pipe that you want to protect is the 990psig one. So the PSV should be installed in this pipe. The 3% indicated in the API is referred to the DP between the piece of equipment to be protected (in this case the 990 psig line) to the PSV itself. So in your...
  5. MMII

    Liquid seal in flares

    Hi everybody. I would like to know what say the different countries legislations about liquid seals in flares. I know that they are not compulsory in USA and that the API 520-521 says that is not mandatory. Anyone know about legislation in other countries?, are they compulsory?
  6. MMII

    Cp/Cv for PSV calculation

    Hi everybody. I’m sizing some PSVs and I have read the article “using the ideal gas Cp/Cv ratio for RV sizing” in which at the end the author concludes “In no case should the real gas specific heat ratio be used as an estimate of the isentropic expansion coefficient, as this can lead to...
  7. MMII

    Utilitities and 2/3 rule

    I work in a european company and we apply the 2/3 rule. First of all take into account that actually the 2/3 rule has changed to "10/13 rule" (because ASME VIII code has changed and the hydrostatic test now is done at 130% of the design pressure instead to the 150% of the design pressure). It...

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