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  1. ohman10

    PI Control Tuning

    I have a master and slave temperature controller that I am having trouble with. I have the setpoint at 218 on the master controller and it sends a remote SP to the slave controller for temperature regulation. The master is dropping in temperature and once it passes the SP say 217.5 it should...
  2. ohman10

    pump head calculation for series and parallel pipe networking

    Use Crane TP 410. Its $60. http://shop.flowoffluids.com/cgi/search.cgi?terms=Publications::&category=Publications If we use less head pump (35-40 mtr head) it will able to pump require flow in each pipe? You need to calculate head loss in each of your runs to see if this is possible, the...
  3. ohman10

    Piping Minimum Thickness

    Schedule 80 pipe because the chlorine institue specifies it. I found that in 31.3 the abs min thickness for a pipe is 0.0625". Thanks for all your help!
  4. ohman10

    Piping Minimum Thickness

    We have had the schedule 80 pipe installed for more than 10 years, we do an ultrasonic NDT every year on it. This year, the inspection revealed that the wall thickness of the pipe is below the min thickness value on a drawing, indicating that it needs to be replaced. I have been unable to get an...
  5. ohman10

    Piping Minimum Thickness

    @BigInch- Thank you for the response. Is this an industry standard? It seems like common sense information but is there a reference that I can use for justification of this method? @PAN- Thank you too for your response. I will make sure to take into account external load and corrosion before I...
  6. ohman10

    Piping Minimum Thickness

    When calculating minimum thickness for a pipeline using ASME 31.3 equations and values I come up with a value that is too small for wall thickness (~0.002") because of small internal pressure (150psig). Is there an absolute minimum thickness requirement, which says if you calculate a value...

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