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  1. JJ10

    Cylinder Purging

    Hi Everyone, Can anybody provide me with a basic high level explanation of how a cylinder purge operation shoud be carried out. The cylinders are used to carry liquid chlorine, so I think they should be purge before refilling to remove any unwated liquids or gases, and I just want to get a...
  2. JJ10

    Boil off pressure control valve

    Hi, Thanks for your response. No this is the only valve between the tank and the suction to the vapour compressor. I guess my question is whats the propose of the valve, or why do we need the valve for control? i.e. why don't we treat the pipe as an extension of the tank and let it feed directly...
  3. JJ10

    Boil off pressure control valve

    Okay, so I am looking at a cryogenic storage tank that uses boil off control to maintain pressure. When the vapour pressure reaches the defined level the PIC open the boil off control valve, and it flows to the vapour compressor and then around a re-compression loop. So my question is: is...
  4. JJ10

    Ethylene boiing point

    Thanks 25362 - that site is really helpful
  5. JJ10

    Ethylene boiing point

    hey thanks for the info...I am study for an MSc in Process Safety, and I come from an electrical background, so its somewhat of a sharp learning curve.. that's helpful, thanks
  6. JJ10

    Ethylene boiing point

    okay really dumb question but if ethylene has a boiing point of 104 degrees C, at what temperature does it cease to be liquid and become purely vapour

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