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Recent content by TangoCleveland

  1. TangoCleveland

    Physical Properties of Crude Oils

    BigInch, I paid around $40 for a new reissue. Search on Amazon for "Maxwell hydrocarbon" and you'll find plenty available. Larry
  2. TangoCleveland

    Physical Properties of Crude Oils

    Maxwell's Data Book on Hydrocarbons is still available in reprint. I got mine from amazon.com. Larry
  3. TangoCleveland

    Effects of applying epoxi paint to a flanged piping joint

    Cosmoline Larry
  4. TangoCleveland

    tank heating coil

    Have you looked at direct fired tank heaters? I had very good success using Infernotherm heaters in asphalt service. Their design provides a very low heat flux density for heating heavy oils. Check http://www.infernotherm.com. Larry
  5. TangoCleveland

    High pressure fire relief - water

    What formulas are you using for sizing the RV? Since you're in the supercritical region, it will act more like a vapor relief valve than a boiling liquid RV. Larry
  6. TangoCleveland

    PRV for high pressure H2 recycle loop

    tgmcg, It doesn't really sound like a complicated situation. I'd suggest contacting your Flowsafe, Anderson-Greenwood, or other major pilot RV rep. You basically want a PRV that will have a constant backpressure on the discharge side. You probably have a huge flowrate so you may need multiple...
  7. TangoCleveland

    Liquid Withdrawal Rate

    iainuts, Thanks loads for the perfect answer. You nudged me in the right direction. Funny how we forget things we don't use very often, eh? Larry
  8. TangoCleveland

    Liquid Withdrawal Rate

    We have a 3600 gallon LOX dewar and we need to replace the pressure building coil. In the interest of sizing the coil correctly, I want to know how much LOX we need to vaporize to support a liquid withdrawal rate of 3 gpm at 30 psig for 16 hours. I'm getting stuck on mass and energy balances...
  9. TangoCleveland

    Code Relief Valve Forms

    You will need to contact a local vendor for relief valves. Look up Farris, Anderson Greenwood Crosby, Flowsafe, or Leser and find a local distributor. Larry
  10. TangoCleveland

    Pipe line rupture

    I found a paper titled "Simulation of Transient Flow in Natural Gas Pipelines", by Junyahg Zhou and Michael A. Adewumi, Pennsylvania State University, Not Dated. It was a PDF on the Web. I don't know what software they used, but the paper did comparisons with two actual field cases, and...
  11. TangoCleveland

    Code Relief Valve Forms

    I just discovered today that there exists a UV-1 form for ASME Code relief valves. I have been working with relief valves dor about 20 years, and this is the first I have heard of the form's existence. I have never received one when I purchased a Code relief valve. How long have these forms...
  12. TangoCleveland

    Pipe Rupture Sonic Flow

    We are working from a NASA document: Workbook for predicting pressure wave and fragment effects of exploding propellant tanks and gas storage vessels Baker, W. E.; Kulesz, J. J.; Ricker, R. E.; Bessey, R. L.; Westine, P. S.; Parr, V. B.; Oldham, G. A. NASA Center for AeroSpace Information...
  13. TangoCleveland

    Pipe Rupture Sonic Flow

    BigInch, Thanks for the idea about transient gas simulation. I found a couple papers from the pipeline world that might help out. I hadn't thought of the pipeline sources before. insult2injury, It is better to err conservatively and use the total volume, but we're trying to fine-tune our...
  14. TangoCleveland

    Pipe Rupture Sonic Flow

    I'm still trying to puzzle this out, so maybe explaining it will help. You're right, if the pipe breaks in the middle, we'll have twice the flow. We don't have a shutdown valve. We're looking at pipe failure in a pressurized system (infinite pressure source), and my manager thinks that...
  15. TangoCleveland

    Pipe Rupture Sonic Flow

    We are trying to evaluate consequence of a pipe rupture for hazard analysis work. We want to determine what length of pipe will contribute flow through a rupture up to the point that sonic flow is achieved. Fluid is a gas (air, nitrogen, etc.) At time t=zero, we have a pressurized pipe with...
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