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Recent content by barthamm

  1. barthamm

    Paving Thickness

    I need to know what thickness of asphalt pavement would typically be needed for a heavy vehicle area. The area is a coal yard for a boiler plant and the traffic will be coal trucks weighing up to 80,000 lb when loaded. The subgrade is 6" of compacted chrushed stone. I have a specification...
  2. barthamm

    Gas Pump Shear Valve

    Hello, I am trying to trouble shoot a gas station pump that is experiencing reduced flow rates. The suction pump is located at the dispensor and is drawing from an above ground tank. I suspect that the tank is too far away and line/fitting losses are causing insufficient pressures at the pump...
  3. barthamm

    Diesel Vapor Lock - Vapor Pressure?

    MJC, Thanks for the advice and the web site link. I had been to the pump school site earlier and did find it very informative, unfortunately I did not find the vapor pressure data for No 2 fuel oil at 120 F. Do you know anywhere else I might look? Your comment about low temperature waxing of...
  4. barthamm

    Diesel Vapor Lock - Vapor Pressure?

    I am working on a fuel oil transfer piping system that will draw No. 2 fuel oil from a remote fuel storage tank to a steam boiler. The pump is a Positive Displacement type pump located in the boiler house. I have performed pressure drop calculation on the suction leg of the pump which shows the...

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