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  1. sshah84

    lowest possible pump speed for VFD

    If you know that your demand may get change lets say from 1000 gpm to 2000 gpm, then better stay away from trimming. Moreover, if you intend to bring down flow from 2000 to 1000 (50%) by trimming pump impeller, that may not be a good idea in terms of pump efficiency. I would recommend first get...
  2. sshah84

    Difference between design thickness and UCS-66 governing thickness

    @ Bobfromoh, That's what I thought. But the funny part with this software is that when min thick is lets say 0.50 inch and if we choose it to be 0.52 inch then report shows UCS-66 governing thickness = 0.52 in. In head equations, while designing thickness based on internal pressure why does it...
  3. sshah84

    Difference between design thickness and UCS-66 governing thickness

    I'm being told that: Lo = crown radius (L) + minimum thickness, where min thickness is user defined thickness not based on UCS-66. But if you see Compress generated report at the beginning, you will find that: UCS-66 governing thickness = ------ inch So I got confused. But I guess this number...
  4. sshah84

    Difference between design thickness and UCS-66 governing thickness

    Hi, I just started using COMPRESS software. I'm trying to work on vertical cylinder vessel. Let me write down a formula so it would be more convenient to explain my problem: ----------------------------------- Design thickness for internal pressure, (Corroded at 122 °F) Appendix 1-4(d) t =...

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