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  1. pkhenry

    ? Flanged or threaded ends

    There are other more complex issues between the differences in threaded and flanged valves. Typically flanged valves are used for high pressure and temperature due to better sealing. There are too many unknowns with threaded valves, when I spec a SS valve I do not allow threads due to galling...
  2. pkhenry

    API Horizontal Split vs Horizontal Ring Section (stacked) Pump

    I am looking at purchasing a 1600'TDH 350 USGPM flow pump. The quotes cover horizontal split, at a much higher initial capital cost and horizontal stacked pumps. I understand the stacked units are higher in maintenance down time which may off set the initial capital. Are there any other...
  3. pkhenry

    316 L SS vs 304 SS

    if you are welding on this material you will find that the 304ss material at the weld zone is little better than carbon steel. You will need to go with a 304L or 316L. You could also go witha dual rated 316/316L material.
  4. pkhenry

    Crimping Reformer Furnace Tubes

    Does anyone have experience in crimping off reform furnace tubes (pigtails) while in operation? Have you had any problems with pigtails cracking at the clamp location? Do you use your own personnel or do you have specialized contractor? What type of equipment and clamps do you use? We have...
  5. pkhenry

    Software that can be used for liquid flow visulaization?

    There is a gentleman at aehodel@usa.net, Alan Hodel, who writes the Internet column for Chemical Processing Magazine. In one of his previous columns he made reference to a site which had graphic slides, movies etc. of fluid flows around various shapes and in piping. You might try him to see if...
  6. pkhenry

    Software that can be used for liquid flow visulaization?

    There is a gentleman at aehodel@usa.net, Alan Hodel, who writes the Internet column for Chemical Processing Magazine. In one of his previous columns he made reference to a site which had graphic slides, movies etc. of fluid flows around various shapes and in piping. You might try him to see if...
  7. pkhenry

    bicycle seat posts

    If you need some good data regarding bike frame and component dimensions try http://www.bikindex.com/tech/techdata.asp Paul Henry
  8. pkhenry

    hi! i speak a little bit

    There are several sites out there for bicycle building one the best with lots of links is www.sheldonbrown.com another dedicated to frames is http://members.aol.com/buildhpv/links/links.htm or www.bikindex.com/tech/ If you are looking at building a frame my I suggest you look into recumbent...
  9. pkhenry

    Hydrostatic pressure rise

    Why is it that the propane or butane are not reaching their equilibrium, i.e. reaching vapor pressure at the temperature. If you initially fill the line to a pressure above the vapor pressure the line pressure will drop to the vapor presure for that gas temperature. Conversely once the gas is...

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