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  1. pipehead

    Nitrogen blanket commissioning

    I'd purge by lifting or removing the relief valve, then set it back after a low O2 reading. Or even blind the pcv and vent upstream by parting the flange at the blind.
  2. pipehead

    Gate Valve - reverse acting, why?

    In pipelines, this valve is piggable. Some of the regular gate valves had guide ears on the bottom of the valve which would hang up a pig. Foster Valve is good too.
  3. pipehead

    KETTLE REBOILER BAFFLE SELECTION AND SPACING

    There are no baffles in in kettle reboiler. You just need to design enough space above the tubes to disengauge and keep the vapor line large enough to overcome hydraulics. You may need multiple vapour outlets too like sshep said on inlets..
  4. pipehead

    'Educated' opinions on climate change

    sms, I see RDK's point. The excess watts from an incandecent bulb heats the house. An in Houston I understand your point there. So RDK is stating at some point you do not get ahead with CF. I have some recessed lights over the kitchen sink. In the summer I put in the CF. In the winter (CO)...
  5. pipehead

    Non-ASME relief valve on code-stamped vessel

    So, how did anyone surive at all before any code or standard, I mean we should all be dead eh? Codes fill in for so any non engineer has access to engineering. Anyoneone can get a pressure vessel today cheaper and easier because of standards or codes. I'll defend Texas as a state that must...
  6. pipehead

    Gen. Y: a rant

    The newer generations have replaced common sense with rules or zero tolerance. I see where there is a new push to replace zero tolerance with more common sense or looking into the facts, circumstances, and intent......
  7. pipehead

    Where is auto propulsion going?

    I believe that gaseous fuels should only be used to heat homes, no conversions to liquids. The reason is that they transport in an infastructure that exists, the cost to convert to liquids is a loss of overall energy. and they just work safely that way. Liquid hydrocarbons should be used for...
  8. pipehead

    Highest Compression Ratio for E85

    look up this link to the cat spark engines. http://www.cat.com/cda/files/98944/7/lehw0815_03.pdf The OP wanted to know the maximum compression ratio and people started talking about ignition temps that dictate it which is wrong. The term of octane number is the best way to calculate maximum...
  9. pipehead

    Non Repeatability of Turbine Meters

    PLC's ARE NOT totalizers, they are averagers.
  10. pipehead

    POSITION OF THE ORIFICE AND THE CONTROL VALVE

    transducers have error as a percent of range. A 1% error on a 0 to 2000 psi means 20 psi so put your 52 psia meter spanned to 0 to 2000 psia and 20/520 = ? meanwhile I'll put a 0 to 100 psia in on my 52 psia and be off 1/52. Who wins now? Oh and because pressure is under the radical, the...
  11. pipehead

    Highest Compression Ratio for E85

    WHAT PATPRIMMER? the 2 liter mitsubishi engine sold in the EVO and the 1.8 liter toyota sold in the celica, vibe, matrix, corolla, elise are gasoline.... These along with the 2.5 liter subi and 2.3 liter ford/mazada are top contenders for HP/CI ratio engines. Good generalized link for the...
  12. pipehead

    Percentage of horse power used in a 6 or 8 Cly Engine Valve train.

    What for? lossen the valve springs to save HP to the valve train, but suffer HP loss when valves "float". It's a trail and error game. Eventually you could run enough combinations to write your own equation taking into account springs, cam lift, rpm, CR, fuel....
  13. pipehead

    Hp Rating Variance

    I've run some of the gas jac curves and I can see about 55 HP maximum, add in coolers and such and you can get to 65 hp for compressor. If you ratio a cat engine it would make 85 hp from the same ci displacement. so, its in the same area if you consider that the ford isn't optimized like a cat...
  14. pipehead

    Boost leak in turbo? Any suggestions?

    I thought the new Variable valve systems everyone was making have no valve overlap until the VVT kicks in and then they have a lot more than an old time big block making big HP.
  15. pipehead

    Highest Compression Ratio for E85

    Crystal1clear, and your point is? By definition at 100 octane you can run 12.5 : 1 and not detonatein a variable compression engine test stand, so auto iginition doesn't hold water. Try your numbers out on nitro-methane and methanol too. After many years of study, catapillar engines and...
  16. pipehead

    Molecular sieves beds insulation

    Ththe equalibrium zone is the area in a bed where the adsorbent has be saturated (to equlibrium)) of the contaminant. The safe zone id a the region in the bed where the adsorbant has not been in contact with the contaninate at a concentration greater than it's regenertaed (of fresh)...
  17. pipehead

    PD PUMPS TO CENTRIFUGAL PUMPS - SERIES OPERATION

    good plan guys, the 15 mile between the station tells me there will be no pulsation that interfers, we have the same arrangement less than 2 miles apart (a little more compressible hydrocarbon mix).
  18. pipehead

    Flow element max. allowable differential pressure

    djack77494, wrong, the newer instruments can be adjusted, I suggest you visit rosemounts web page or the others honeywell, yokagawa, ect and get caught up.
  19. pipehead

    Glycol Replacing Freon in Precooler Compressor

    you can't do that. you could use a glycol contactor system (TEG) to dry the air at 15C to a -5C dew point. i've never seen frost on the outside of coolers unless the product on the inside was below 0C. If the air is cold, then there is no water in it to freeze. Why not automate the...
  20. pipehead

    Percentage of horse power used in a 6 or 8 Cly Engine Valve train.

    No way to answer, how many cams, compression ratio, valves/cykinder, BMEP, spark v disel, and on...

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