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  1. whammett

    natural gas 2" pipe 10 psi

    Your undersized. Assuming everything is ideal from the utility or supplier, and everthing downstream of the piping is in order. What I don't understand is going from a 2" diameter pipe steping down to a 1-1/4" diameter pressure reducer. By lowering the diameter, you actually increase the...
  2. whammett

    Can fin fan cool water below outside temperature

    "I would be surprised if got to 100 deg F in summer months in TX." Even in mid and east Texas the temperature often get in triple digits, especially during august and september. "Scientists dream about doing great things. Engineers do them." -James Michener
  3. whammett

    advice to pulling out a submersible pump

    Try to fish it out. I dont know what the technical name is for it, but when I used to do some work on oil rigs during college summers, they had a device called a "Cocodrie Collector". It was an I beam layed out horizontally and welded to 2 more pieces of I beam. It was on wheels. The cool part...
  4. whammett

    The finger can point a bunch of ways on the Gulf Oil Spill

    7,600 people in Louisiana are out of work due to the drilling ban That's as of now. I am currently in Louisiana. It's terrible. As drilling companies and contractors reserve funds dry up more and more people will be layed off. "Scientists dream about doing great things. Engineers do them."...
  5. whammett

    wetted area for column trays

    Jefka, my formula DID imply that. It uses your previous equation of (N*l + L)+bottoms liquid surface area except i subtract the volume taken up by bubble caps from the total combined liquid volume. Which is the same as saying liquid volume of trays+liquid volume of sump- volume of bubble caps...
  6. whammett

    Steel quench tank, protect from surface rust ?

    It depends, more than likely, yes. Post the exact specs for the metals you are using. What is the spec on the steel for the tank? And then the parts? The anodes should work for cathodic protection, but I can't deduct much information from a galvanic scale chart without you providing precise...
  7. whammett

    wetted area for column trays

    Thanks CMA010, that is what I was getting at. After having subtracted the volume of bubble caps, the wetted area actually decreases. More accurate- yes. More conservative- no. When dealing with sizing PSV's, its always better to go conservative. However, some companies may not agree, epecially...
  8. whammett

    use gas lift pump on BP Macondo blowout?

    Sloan, E. D. Clathrate Hydrates of Natural Gases. New York: Marcel Dekker Inc., 1990. An old book, but you can probably find some things in there to support your argument Windward. "Scientists dream about doing great things. Engineers do them." -James Michener
  9. whammett

    pipe size

    I have some ocean front propert in Arizona for sale. Good price. Ill even throw in the Golden Gate bridge for free. I can't take credit for that paraphrased quote. Thank's George Strait. "Scientists dream about doing great things. Engineers do them." -James Michener
  10. whammett

    use gas lift pump on BP Macondo blowout?

    Yes, they are referring to it as a cap now. Sorry for the crude image, that was my feeble attempt at trying to relate the diffreneces between the top hats and the new "cap" without actualy sketching and uploading a drawing. The first representing the cap, the second representing what they...
  11. whammett

    Set pressure of safety valve

    Never. That sounds very odd to me. However, your wording seems to be conflicting. In your first statement you say that the piping pressure specs are lower than the relief valve setting. (Worst case scenario, piping giving way before relief valve lifts). But in your second paragraph you say it...
  12. whammett

    use gas lift pump on BP Macondo blowout?

    "nearly half of the oil is still leaking with this arrangement" Not true, check my numbers. And also, they quit using the term top hat with the last 2 failed attempts. This is just a cap, with no flat bottom. This is just me being picky. To all their own. ___ ___ | | instead of...
  13. whammett

    Flow in a branch line

    Biginch is correct. There will be a pressure difference but you have to take into effect the momentum of the liquid. If its just 2 90degree bends to the branch, it will be a stagnant line. You would have to try and "induce" flow so to speak. Easiest way is to angle the two lines attatching to...
  14. whammett

    use gas lift pump on BP Macondo blowout?

    Ok. Currently BP is deliberating installing a larged cap to try and draw more of the oil from the cut riser. They are currently capturing roughly 623,000 US gal per day of oil(based on yesterday's take of oil). There is roughly 20,000 bbl of oil leaking out per day(current estimate, gathered via...
  15. whammett

    On / Off monitoring for butterfly valve

    Sorry, I misuderstood you. Yes, its very common. Grainger has a line that we use in some of our plants. http://www.grainger.com/Grainger/items/5MPP4?cm_mmc=Google%20Base-_-Plumbing-_-Valves-_-5MPP4 "Scientists dream about doing great things. Engineers do them." -James Michener
  16. whammett

    On / Off monitoring for butterfly valve

    Typically mechanical linkage to a valve positioner which is attatched to the stem will show the postion in a pneumatic flow control valve. You can buy some actuators that have associated pressure transducers. Once you program the controler to the given ranges, the controler in a digital system...
  17. whammett

    Lap Flange Materials

    Another issue is safety which isnt readily addressed. Disimmilar matterials will expand at different rates. For example, a few years back at Exxon's Light ends plant at the Baton Rouge Refinery, the firefighters who sprayed water on the fire just made it much much worse. That's because the...
  18. whammett

    Steel shape dimension

    You might want to try reposting here http://www.eng-tips.com/threadminder.cfm?pid=559 "Scientists dream about doing great things. Engineers do them." -James Michener
  19. whammett

    velocity equation for pulsation blood flow

    Ok, I immediately reject my last option of a straight artery. You could model arterial pulsations of main arteries because the main path is rather uniform in all human persons. It still wont be very accurate though. "Scientists dream about doing great things. Engineers do them." -James Michener
  20. whammett

    velocity equation for pulsation blood flow

    Also, try finding two arteries that are exactly the same. On top of unpredictible turbulence(due to pulsations and the bending and turning of arteries, capilaries, etc), pulsating flow, unknown "piping" diameter, and potentially partially blocked "piping" due to plaque deposits, it is exremely...

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