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Recent content by ENC

  1. ENC

    So You Gut Shot an Estimate . . .

    RLM2000, You should treat Mom & Pop just like the big boys, and tell them that meetings cost money and how much. We tend to limit the number of meetings in our proposals and if they want more meetings it is at additional cost. I find clients usually want to have less meetings if they know...
  2. ENC

    So You Gut Shot an Estimate . . .

    RLM2000, Our firm tracks our hours to perform different types of work. We use our historical record to help us establish the estimate for the work. We mostly give an estimate-not-to-exceed, and we write a scope of work with our proposal so that if there are changes to the scope of work we can...
  3. ENC

    Strange PE sealing request

    Enpen, I have run into this issue in NJ as well. The agencies people sometimes seem to ignore the NJ Lic. Board Rules at their convience, from time to time. It depends who is involved with the project. In an effort to keep good client relations, I would try to speak with a PE in the agency...
  4. ENC

    corrosion accelerated with use of block heaters ?

    If the water is not circulated during the standby state, then there may not be sufficient passivation taking place on the unit metal surface. Or debris can be settling on the surface, which will inhibit passivation. Heating can accelerate corrosion and stagnent seawater is not good either...
  5. ENC

    Work Permit during Turnaround

    On shutdowns, we minimized the loss time by having the shift supervisors get to site on time, and chase down the safety officer authized to write WP's. This was the first item of business when the super arrived on site. Since no one worked until the permits were issued, the shift supervisor...
  6. ENC

    I need a basket strainer - 40 microns at 500F

    Try Tim Randall at Jamison Products see www.jamisonproducts.com good luck
  7. ENC

    subsea pipeline anti-corrosion coatings

    A very good coating system is Placite 7122 LAR or Placite 7122 HAR for seawater service. However further understanding of the application is needed. PU is used in some areas with success but it has it's limitationa and problems
  8. ENC

    Liquid Sulfur Tanks / Ventilation

    Well the matter you are describing requires some study. However, generally the displaced air during filling is vented and the new air is introduced during discharge from the tank. This is a typical problem with most of the above ground storage tanks (AST). To make the processes more...
  9. ENC

    PROTECTING GALVANIZED SHEET METAL

    wynn, all of the above responses are very good. I agree that welding, brazing and any hot work will damage the coating. We recently were working with a client who circumvented the issue by selecting aluminum sheet. They discovered the cost was less than the mill galvanized sheet and they were...
  10. ENC

    Seawater Cooling system Network Balance

    If you reference "CAMERON HYDRAULIC DATA" the flow through orifices, nozzles and venturi tubes is provided. In your case you will have to assume the value H = difference in head between upstream end and throat in feet. This should give a good approximation, from the max to the min...
  11. ENC

    Seawater Cooling system Network Balance

    I agree with rbcoulter that the K value is needed for all the branches for distribution. If it is possible you may want to consider using a portable flow meter that would allow you to establish branch flows in a proportional basis. Another approach would be to measure pressure in each branch...
  12. ENC

    What is the cost for a stationary f

    I found several articles that suggest fuel cells will cost $3500/Kw to $4200/Kw. Thanks for you help.
  13. ENC

    PEM FUEL CELL AT YELLOWSTONE NAT. PARK!

    Does anyone know if the PEM by H Power Corp, fuel cell in Yellowstone National Park is up an running? Read September 2002 Input/Output Mechanical Engineering for some background information and information about the fuel cell application.
  14. ENC

    Low Temp Thermal Expansion

    There are several charts from manufacturers of expansion joints listed in their catalogs. One in my bookcase is a chart from -200 F to 1400 F from Power Pipe Supports, Inc. However the chart I find most handy and use the most is in the Pressure Vessel Handbook published by Pressure Vessel...
  15. ENC

    Pathological Gait in Transplant Rats

    Ouch, the low cost budget question. Well, first why do you measure the gait? I would forget about computer technology or high speed cameras. You can try digital photos or still photos on a measured out grid. You can try having the RATS run through a marker (paint) and then across paper...
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