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Recent content by ultrazero

  1. ultrazero

    Piled foundation fitness for service

    Thank you all. I am getting a handle on this. We are contacting an expert for a further evaluation. Ultrazero
  2. ultrazero

    Piled foundation fitness for service

    Dear SlideRuleEra, Thank you very much for your insight. Would you mind to quantity your answer? Say, formula, specific settlement value, or rebound value, as the criteria for acceptance or rejection? Ultrazero
  3. ultrazero

    Piled foundation fitness for service

    Steve, Thank you very much for your insight. You confirmed what I know up to this point. API documents do not address FFS for concrete foundation on piles. This is what I found from literature (caution: not from field experience): Timber piles last indefinitely under water. It can be...
  4. ultrazero

    Piled foundation fitness for service

    Hello all! Does anyone know a fitness for service plan for piled tank foundations under a storage tank? API 653 appendix B addresses settlement of tanks on soil, or on a ring wall. It does not cover a tank on a concrete pad supported by friction timber piles. We can measure the edge...
  5. ultrazero

    Storage tank finite element analysis - fitness for service

    Thank you much all. Accurate measurement of the settlement is vital. I am going to investigate laser survey instrument compared with an optical unit. The former should have much higher accuracy. My most recent discovery: API 650 Appendix B and API 653 Appendix B discuss tank foundation...
  6. ultrazero

    Storage tank finite element analysis - fitness for service

    Corus & Steve, thank you much for your valuable inputs. My main interests are out of plumb and foundation settlement (approximate 1" difference for a 50 ft dia. tank). The tank was built 30 years ago. I do not know if it remained that way after construction, or a gradually worsening problem...
  7. ultrazero

    Storage tank finite element analysis - fitness for service

    Can any point me in the right direction? I need to do a finite element analysis on an existing chemical storage tank to validate its fitness for service. Is there a software package available? What procedure should I use? The tank is not for petroleum product. The closest that I can come up...
  8. ultrazero

    How to improve heat transfer with agitator at an asphalt tank?

    Hello, all! I am working on improving the heat transfer of hot oil heating coils inside an asphalt tank, at 100-ft in dia. The tank has 4" insulation, with internal solid fin heating coils, and no agitators. It not heated until the content needs to be offloaded to trucks. It takes 5 days...

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