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  1. rkinga2

    HPTA High Pressure Safety Code - Pressure Test Barricades

    I'm trying to find a copy of the HPTA High Pressure Safety Code, put out by the High Pressure Technology Association in the UK in the 70's. Any hints or clues? I have a nice description of it in the 1975 High Pressure Engineering conference proceedings from IME, but am running into a brick wall...
  2. rkinga2

    Air Filter Test Lab??

    I need a lab to do air filter media performance testing per ISO 5011. Any suggestions? (I can't use SWRI because of a conflict of interest on this project). Thankx.
  3. rkinga2

    Towing Allison w/ Driveshaft - What Can Happen?

    Rod, An APU would be nice. I'm stuck with a PTO-driven pump.
  4. rkinga2

    Towing Allison w/ Driveshaft - What Can Happen?

    Info from Allison on truck transmissions says to not tow w/o disconnecting driveshaft. What's the problem w/ towing w/ driveshaft? Could I do it if I leave the engine running to drive lube pump? (I'm specifically thinking of a cement truck where you would want to leave the engine running to...
  5. rkinga2

    Pressure-Relieving Flange Gasket??

    Whoa - guys... I didn't mean to get everybody's blood pressure up! The device was suggested as a low-cost solution for a situation that needs a rupture disc & someone thought that he had heard of such a gadget in the distant past. Thanks for your comments.
  6. rkinga2

    Pressure-Relieving Flange Gasket??

    Is anyone familiar with a pressure-relieving flange gasket?? It reportedly fits between 2 pipe flanges like a regular gasket, but blows out when a given pressure is reached.
  7. rkinga2

    To seal or not to seal We are in

    Is anyone familiar with a pressure-relieving flange gasket?? It reportedly fits between pipe flanges like a regular gasket, but blows out if pressure reaches a given level.
  8. rkinga2

    VOC vs. Vapor Molecular Weight??

    Gracias.
  9. rkinga2

    VOC vs. Vapor Molecular Weight??

    If I have a brew of hydrocarbons (eg. mixture w/ aliphatic diesters) that has a published VOC of 7.813 lb/gal, is there any way to guess a molecular weight of the vapor?? (vapor pressure = .200mmHg @ 68F)
  10. rkinga2

    Vapor Pressure of Liquid Solution

    Thanks for the comments. Obviously, testing would be best.
  11. rkinga2

    Vapor Pressure of Liquid Solution

    Thanks. Would Raoult's law give a pretty good guess? VPtot = X1*VP1 + X2*VP2 Where X's are molar %
  12. rkinga2

    Vapor Pressure of Liquid Solution

    If I have a solution of one liquid, say gasoline, of known vapor pressure, dissolved in another liquid of known vapor pressure, say diesel fuel - what's the vapor pressure of the solution?
  13. rkinga2

    Molecular Weight of #2 Diesel???

    Hey, if you're a star, your're a star. What I conclude from this little discussion is that for something approximating an ideal gas, the % volume is equal to the ratio of partial pressures, whether I know the molecular weight or not.
  14. rkinga2

    Molecular Weight of #2 Diesel???

    Thanks, once again. I got the 8x specific gravity of diesel vapor from an MSDS. Your explanation makes much more sense.
  15. rkinga2

    Molecular Weight of #2 Diesel???

    Thanks for the comment. Duh, I should have caught that - Thanks for graciously refraining from pointing that out. As they say, I get by with a little help from my friends. So, the mass of diesel evaporated in the tank is more correctly 0.0231 lbm, and to further beat this dead horse: Diesel...
  16. rkinga2

    Molecular Weight of #2 Diesel???

    OK, let me get this straight. The equations seem straightforward enough, but as a guy who learned to do engineering with a slide rule, I always feel a bit better if the answer seems to make sense. For: #2 Diesel fuel Air @ 60F Partial Pressure: .0074...
  17. rkinga2

    Molecular Weight of #2 Diesel???

    Thanks for the helpful info. I also posted a similar question to the "Chemical Engineering - Other" forum where it got some good comments, including a link posted by 25362 to a good Chevron tutorial on diesel fuel
  18. rkinga2

    Molecular Weight of #2 Diesel???

    Thanks for the info. Any hints on how to convert mol % to % volume or % mass??
  19. rkinga2

    Molecular Weight of #2 Diesel???

    Hi. I'm trying to calculate the concentration of vapor in a tank containing liquid #2 diesel fuel & air. I have numbers for vapor pressure, which would let me calculate the concentration if it were an ideal gas or other pure substance. Is there a rough approximation of an equivalent molecular...
  20. rkinga2

    Coeff of Discharge for Leak

    I'm doing some estimates of choked flow of methane thru a leak in a pipe. Any recommendations for what coefficient of discharge to use? I have used 0.6, but I've seen some examples on the web of 0.72. My current problem is a 1" hole in a 1-1/4" elbow (1.38" ID), but I'm also...

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