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Recent content by KenA

  1. KenA

    jacketed metering pump for molten sulfur

    I don't know about jacketed metering pumps, but you could talk to Controls Southeast about their controheat products (http://www.csiheat.com/Products/Bolt-On/Controheat/examples%20on%20pumps.htm)
  2. KenA

    Stripping Steam Calculations

    Aw786, You are best to simulate this on a process simulation package such as HYSYS. You will need a lot more information than just the volumetric flow of feed. How about composition? How about product spec? Is this an existing column or a new design? If existing column then you will need...
  3. KenA

    Bypass or Hand jack

    thalathb, Another factor is size of control valve. As the control valve size increases, so does the size of the manual bypass valve and the size of the manual isolation valves around the control valve set. Larger size means more space required and more cost so larger sizes start to cause...
  4. KenA

    Sour gas flare stack

    Renoyd - you could just make the flare 500ft. It's been done before. We've just completed a flare which is a little over 600ft. Talk to John Zink.
  5. KenA

    How to convert Kg/hr to Nm3/hr

    Nm3/h is commonly used as a unit of measure for flow of compressible fluid (e.g. vapour) because the volume varies with pressure. If your flow is LIQUID ammonia then you can pretty safely assume that this is incompressible and thus volume does not vary with pressure (density is constant with...
  6. KenA

    Calculating specific gravity

    25362, No I don't believe that this is correct. The Gas SG is not the gas density divided by reference gas (e.g. air) at standard conditions. The definition is as written by athomas236 above. The temperature and pressure at which the densities are quoted must be the same. i.e. the density of...
  7. KenA

    Condensate load for steam trap

    What's the conditions of the condensate return header? Check out Spirax Sarco website.
  8. KenA

    Calculating specific gravity

    Folks, I've been watching this discussion with interest because it's a problem which vexed me a while ago. I totally agree with the definitions given by athomas236 above. The Gas SG is the ratio of gas density to air density at the same temperature and pressure conditions. The point that I...
  9. KenA

    supplying water uphill

    Dam the stream, install a weir and construct a small pond towards the top of the hill. Is this a trick question? Are you going to tell us the answer?? Is this related to some real life application?
  10. KenA

    Pressure from Thermal Expansion

    It is likely that the thermal relief valve set pressure will be at or marginally below the pressure limit set by the ASME flange class. At 19bar it sounds like it is a class 150 flange. The design pressure is a value which is selected (usually by the Process engineer) and usually relates to...
  11. KenA

    LIT on vessel with ESD signal

    Sorry you are going to have to re-word your question to make it clearer. I don't understand what you are asking.
  12. KenA

    Steam ejector design

    Alternative vendors inlude Korting (http://www.northvalekorting.co.uk/products-fluidjet.asp) and Transvac (http://www.transvac.co.uk/) amongst others.
  13. KenA

    Designing a Water / Wastewater Treatment Plant to ASME B31.3

    In cases where the water / wastewater plant is an intengral part of a larger hydrocarbon complex then I believe that it is fairly common to continue the use of B31.3 across the whole plant, including the water areas. I'm guessing that this is generally done to simplify / standardise the piping...
  14. KenA

    LIT on vessel with ESD signal

    This philosophy is usually a client (owner) preference rather than a code requirement. If the ESD trip comes from a standpipe then there is risk of standpipe freezing or blocking or inadvertant closure of isolation valve(s) on standpipe connections. The purpose of the ESD is to protect against...
  15. KenA

    REDUCING SAFETY VALVE SETTING PRESSURE?

    Be careful not to reduce the safety valve set pressure so that it is very close to the operating pressure, otherwise it could result in "chattering" and potential damage to safety valve.
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