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  • Users: johngerhart
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  1. johngerhart

    engineering stds

    we are looking for a good set of engineering stds and have contacted several companies . PIP in particular , If anyone has them , would they please comment on their quality . Who else sells a braod based set of design-build-inspect-maintain stds
  2. johngerhart

    Indiction motors

    We have a 9000 hp induction motor on a turbo comppressor . The question has been raised on frequency of allowable starts . per hour, day ,life . We protect the unit with a multi-lin which requires it to get to speed in less than 16 seconds or trip and holds the unit from starting again until the...
  3. johngerhart

    gas piping

    dies anyone know a good reference for sizing natrual gas pipelines starting with either 90 or 600 psi, we will be tieing into a new main for a prposed plant expansion
  4. johngerhart

    natural gas pipeline sizing

    does anyone know a good reference for sizing nat gas pipelines at either 90 or 600 psi , delta P per 100 ft . any good cost data on $/ft installed with cathodic protection versue pipe diameter
  5. johngerhart

    HITEC molen heat transfer salt

    Looking for very old references to the reactivity and consequences if organic vapors leak into the salt side . Dupont/API work from the '40s and 50's . Suggestions welcome . Who did Dupont sell this business to?
  6. johngerhart

    Incoloy 800

    Looking for assistnace with incoloy 800 failures modes in heat exchnagers form 500-1000 F , potentially cyclical operation . Some suggestions are carburizing , embrtiilement ? thank you
  7. johngerhart

    plastci strand dryers

    Need vendors that actually have designed strand dryer for predrying strands before they enter the pelletizer . Tired of home made
  8. johngerhart

    Oxygen sparge pipes

    Need to review possible materials of construction for oxygen sparge pipes from SS to Ni
  9. johngerhart

    Dense phase pneumatic conveying

    Need a good reference on the pressure drop rules for dense phase ; ie , types of sweeps , allowable staic lift , etc
  10. johngerhart

    Bolier and gas turbine maint costs

    Can anyone help with estimating annual maint costs for a packaged steam boiler and/or gas turbine , as a % of the original investment ? References would be much appreciated
  11. johngerhart

    Calculating CO2 reduction

    With the pressure to start reducing CO2 emissions , has anyone developed a rating system for existing technology . I think there will be may unit ops that are simply not energy efficient enough and must be replaced with new technology .
  12. johngerhart

    gas turbines

    Need a good reference for calculating direct and indirect operating costs for a gas turbine generator
  13. johngerhart

    heat exchanger fouling

    does anyone know a good literature source for modelling heat exchanger fouling and redesign . We would like to chracterize the type of fouling , cacl U on line and look at redsigning the exchanger to eliminate the issue
  14. johngerhart

    density separation references

    I am looking for references to study density separation of one solid material from another . Would someone please suggest references. thanks
  15. johngerhart

    Powder agglomeration via coating

    Loking for techincal assistance at evaluating coatings as a means of increasing the particle size of a fine powder
  16. johngerhart

    Vacuum pump performance

    In our compounding operation , we are beginning to experience vacuum pressure spikes which are effecting product quality . Does anyone know of someone who is good at diagnosing the issues . We have a list of things to review but need a resource to help
  17. johngerhart

    Fuel Value

    Is there a reference that shows how to calculate BTU fuel value if you know the chemical make up of a material
  18. johngerhart

    Eqpt, engineering cost and installation multipliers versus USA

    I am working on a project to locate a facility in either China or Japan using US derived cost data and estimates , where can I find indices

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