Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: johngerhart
  • Order by date
  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

    thank you , but the supplier has been quite evasive even when I asked for an engineering judgement
  3. 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...
  4. johngerhart

    gas piping

    thank you , but I was looking for a diameter / pressure drop sizing std , if there is one specifically for gas and/or pipeleines . I have the ASME designation for the installation
  5. 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
  6. 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
  7. 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?
  8. johngerhart

    Incoloy 800

    thanks for the replies , but really looking more for literature references on what might be occurring 850-1000 F materials are britlle with evidence of cracking anyone know who is competent at repairing ? Thanks
  9. 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
  10. johngerhart

    plastci strand dryers

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

    Oxygen sparge pipes

    application is an oxidation reactor , sparging pure oxygen into a stirred vessel
  12. johngerhart

    Oxygen sparge pipes

    Need to review possible materials of construction for oxygen sparge pipes from SS to Ni
  13. 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
  14. johngerhart

    Liquid holdup in distillation column

    look at the weir height at design and estimate liquid holdup accordingly
  15. 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
  16. 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 .
  17. johngerhart

    polyethylene and polypropylene

    go through old issues of Hydrocarbon Processing
  18. johngerhart

    Storage Tank Inerting Required?

    I am surprised NFPA 30 does have some information . In any event , if there is no ignition source suchas an agitator , inerting should not be necessary . I am assuming the liquid is dip piped into the tank . Other possible sources for information are Factory Mutual Loss Prevention Manuals and...
  19. johngerhart

    gas turbines

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

    Operator training dynamic simulations reviews

    2 suggestions : 1) look at NEXUs as a program for simulating and setting plant operating rules 2) Review the required resources , if you can't spare the people , don't bother with the project . Solid , dedicated time committment is an absolute requirement to succeed

Part and Inventory Search

Back
Top