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  1. dtlb26

    What are pipe "loops"?

    Loops are typically used to create a pressure drop to minimize water/condensate hammer through long pipe runs. Have seen on steam, condensate and cooling tower applications.
  2. dtlb26

    Burning Off a Hydrogen Process Stream

    John zink or similar RTOs will do fine
  3. dtlb26

    Mol Sieve Afterfilters Failure

    Sorry, your question is confusing. If desgined correctly, the 40 mesh strainers are to remove all larger particles. 40 mesh is 420 microns. I'm confused on why the filter element demads such a small mesh size (ethanol uses a 100 micron size for MSU applications), yet downstream, the micron...
  4. dtlb26

    ethanol removal from air stream

    Please post your flow for feed streams and composition. U have the design condition for the heat exchanger? Also include your flow and composition of final product.
  5. dtlb26

    Ethanol recovery by Distillation

    Nice post dcasto. Should also point out that, depending on the technology used, some use an additional colum to capture ethanol from bottom streams. Vodka stills utilize a 4 column design. Fuel ethanol is 2-3 stills (depending on technology).
  6. dtlb26

    Problems calculating pump flow

    agree with dbcoulter Get pump data information from nameplate, contact supplier or search online for pump curve. Check pump pressures in field (dead head condition), see where you are on the curve. If you believe this is incorrect, troubleshoot (rent a flowmeter, timed 5 gallon bucket test...
  7. dtlb26

    Dead mans handle valve with delay?

    Here is a link to a dead man's handle http://www.centurywise.co.uk/view.asp?pid=72 Spring loaded valves are simply an air actuator with a large canister on the side. If air is lost, the spring will force the valve shut. Fail close valves.
  8. dtlb26

    Noise generation from gas releases

    Sorry, I have no value added to this post, but the title did bring a smile to my face. Thought this may be a personal dilemma.
  9. dtlb26

    Job in US or Canada as Process Engineer

    Recommendations: 1. Find an American or Canadian to marry you 2. Get your professional engineering designation. I'm a Canadian working in the USA. Prior to my PE designation, I could not find work in the USA.
  10. dtlb26

    Plant roads.. always straight..?

    Do whatever makes the most sense. Bends can cause some concerns over plant traffic, equipment moving, laydown areas, etc. The benefit sounds like it fits! Bends are also an excellent way of slowing down plant traffic and having people look for alternate routes.
  11. dtlb26

    A little confused about secondary containment

    From my interpretation, you can have low point drains that would feed back to the primary system. All works great until you evaluate your SPCC plan. Hence why one should always look at tertirary containment.
  12. dtlb26

    Using a title "Process Engineer"

    Contact your local state or provincial engineering office and inquire to be sure. Canada has a nationwide agreement, and using the information for Manitoba below, I'm confident in stating that you cannot use the word engineer. About 7 years ago, I was on a board for a provinical association...
  13. dtlb26

    concrete chemical plant structures? v steel ?...

    http://campus.udayton.edu/~hume/HooverDam/hooverdam.htm
  14. dtlb26

    treatment of 0-1 tool steel

    Gotta be a misprint..NICr2
  15. dtlb26

    General P&ID Review Recommendations

    You didn't mention your industry. Consider doing a PHA or Hazop review for these P&IDs. Some references: http://www.uscg.mil/hq/gm/risk/E-Guidelines/RBDM/html/vol3/08/v3-08-03.htm#32 http://www.primatech.com/info/paper_major_hazards_analysis_an_improved_process_hazard_analysis_method.pdf

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