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  1. VL0

    IGC Code §17.18 Propylene oxide

    Hello, I was reading the IGC Code when I came across this article §17.18.12: "Filling and discharge piping shall extend to within 100 mm of the bottom of the tank or any sump" Do you know why this requirement is specified for the propylene oxide case? Is there anything special to consider for...
  2. VL0

    PRD sizing using API 520-Part 1

    Hi all, When using equations (9) and (10) from the API 520 Part 1 (October 2020) for the sizing of PRD (sizing for critical flow) I don't get the same results. Indeed, when using equation (9) I get a required discharge area almost twice as much as the value when using equation (10). Is there a...
  3. VL0

    UG-32 or Appendix 1-4?

    Hello, Looking at calculation reports for thicknesses of pressure vessels formed heads, some people refer to UG-32 and others to Appendix 1-4 : formulas used for the design of formed heads under internal pressure. Appendix 1-4 says that paragraphs 1-4's equations provide for the design of...
  4. VL0

    Pipe stress analysis on cryogenic application

    Hello, In the industry, pipe stress analysis on cryogenic application is not always performed for small diameter of pipes. (below 1 1/2")(instrument pipes). Is there a technical reason for that? Regards, VL

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