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  1. wenchop

    Forums.coade.com

    hello, the site forums.coade.com seems to be down or offline starting a few days ago? Please advise.
  2. wenchop

    Structural Engineering Software

    In Canada, do the provinces regulate which software products may be used in the design/engineering of structures?
  3. wenchop

    Looking for the "bible" of piping stress engineering

    Hi, I am looking for the best book/article/handbook/website/etc. that is the best resource for piping stress engineering. Any comments appreciated. regards,
  4. wenchop

    using a natural gas screw compressor for air compression

    hi, is it technically feasible to use a natural gas screw compressor (200 hp or 100 hp electric drive) for air compression? I will appreciate the help! thank you!
  5. wenchop

    applicable code for utility piping in Canada

    hello, what is the applicable code to design of small diameter (3 inch) and short length (few hundred meters) piping with utility (fuel) natural gas and instrument air, in Canada? What does it depend on? thanks for any input.
  6. wenchop

    flare header purge

    At the flare tip, it is clear what purge rates to use, depending on the seal if it is velocity seal or molecular seal or just a utility flare. However, if there are a number of headers and subheaders in the relief system, each has to be purged, both at intermittent rates (e.g. during startup to...
  7. wenchop

    Multiple flares and thermal radiation

    API 521 states: "The impact of multiple flares in proximity operating simultaneously needs to be considered when evaluating thermal radiation." What we have is a case of several flare stacks/risers in parallel in close proximity, so they are almost in the same location. The question is whether...
  8. wenchop

    Turndown ratio of separator vessels

    Am I correct to suppose that the turndown ratio (capacity utilization) of 1. A two phase separator vessel 2. An three phase separator vessel is from 0-100%? In other words, they can operate at minimum capacity from 0 to 100% with no technical issues. This is about the vessel, I know that the...
  9. wenchop

    Pipeline underground or aboveground

    Hello, a steel insulated pipeline will operate with a liquid stream to be maintained at aprox 140°C and ambient temperature is aprox 15°C minimum, is there a rule of thumb that determines whether this pipeline cannot be buried/under-ground, and that it has to be above ground? I am thinking...
  10. wenchop

    RELIEF LOAD DEPRESSURIZATION VALVE VS RELIEF VALVE

    HELLO, IN GENERAL FOR A PRESSURE VESSEL, HOW WOULD YOU CONSIDER THE RELIEF LOAD DEPRESSURIZATION VALVE DESIGN PEAK LOAD VS RELIEF VALVE DESIGN LOAD TO COMPARE TO EACH OTHER? EQUAL? ONE BIGGER THAN THE OTHER? THERE IS NO GENERAL RULE? THIS IS CASE OF FIRE FOR BOTH (DEPRESSURIZATION DUE TO...
  11. wenchop

    Pressure Relief at heat exchanger shell and tube for fire case

    Hello, I have to design a pressure relief valve (PSV) for fire situation for both the shell and the tube side of a heat exchanger. The reason is that we have many trains, and they can be isolated/blocked during routine maintenance, and we are assuming that they will not be drained at all times...
  12. wenchop

    Pressure Relief at Propane Chiller

    Hello, I have to design a pressure relief valve (PSV) for fire situation for the shell of a propane chiller. In the shell, we have propane in evaporating service that removes heat from the produced gas stream in the tubes. At relieving conditions, the propane is above the critical pressure...
  13. wenchop

    pressure relief system

    Hi, I am working on basic engineering for a pressure relief system, we have decided to install high and low pressure flare headers for high and low pressure relief systems, with high and low pressure flares. The high pressure flare header will relief vessels placed in 300 ANSI class service...
  14. wenchop

    API 521 recommended practice?

    The previous edition of API 521 was listed as a recommended practice, the new one not, is this code mandatory? thanks,

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