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  • Users: GarethChem
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  1. GarethChem

    Commissioning standards

    Hi everyone I just wanted to find out if anyone knows if there is an API standard or similar for commissioning (particularly for a tank farm). Thanks! Gareth
  2. GarethChem

    PRV resetting frequency

    Hi everyone I have tried searching for an answer on the forums and google and can't find anything conclusive. I used to work for a company who said that every time that a PRV lifted, it had to be taken out and reset as the spring became unreliable (though this was never done in practice, this...
  3. GarethChem

    Thermal relief on LPG lines

    Hi everyone I read the following in a FEED: "LPG - any section more than 500L of LPG that can be blocked in shall be provided with a TRV." Do you have any idea why there is a limit to the smallest volume that requires a TRV? I'd imagine a rupture in the line or flange or a failing gasket is...
  4. GarethChem

    Hot work safe distance from live plant

    Hi all I have been asked to commission a tank and am concerned about future work on site. They will be continuing with hot work a little distance from the tank while the tank has been commissioned (though it will be a different system). I haven't been to this particular site yet so the distance...
  5. GarethChem

    Jet A-1 contamination

    Hi again! I am researching the possibility of multi-product pipelines, and need to know how much diesel (gasoil) or gasoline (mogas) is alllowed to contaminate Jet A-1. From what I've read, it seems the limiting factor may in fact be the water in the diesel and gasoline, rather than the...
  6. GarethChem

    Vapour pressure question

    Hi all I feel like I am losing my mind. There's something that's confusing me: We are filling LPG tankers from LPG spheres. The spheres are at about 6 bar, 50/50 mixture of propane/butane. The LPG exits the bottom of the sphere and gets pumped by vane (positive displacement) pumps through the...

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