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  1. David272

    Periodic Review of Unchanged Relief Systems

    In a batch chemical plant environment, the emergency pressure relief system may be reviewed when the materials made on the plant are changed. I did this for one plant, but took the approach of demonstrating that the solvents used in the new process had lower molar latent heats than the previous...
  2. David272

    Designing reliable fireproof insulation to achieve F = 0.1 to limit emergency pressure relief size

    Don, George, Thank you for your replies. Thankfully the reaction going on in the vessel is reversible and not significantly exothermic, so it's possible to ignore that. I had only been thinking about protecting the contents of the vessel and not the coils or the jackets. However, it's an...
  3. David272

    Designing reliable fireproof insulation to achieve F = 0.1 to limit emergency pressure relief size

    Met, Thank you for replying. As it happens, this vessel does not have a bottom run-off, so for this particular case, it would not be possible to have a pressure relief valve at the base of the vessel. I have never heard of having emergency pressure relief from the base of a vessel before, but...
  4. David272

    Designing reliable fireproof insulation to achieve F = 0.1 to limit emergency pressure relief size

    Hi, I have a question about using stainless steel jacketed mineral wool versus calcium silicate for fire protection of a process vessel. API 521 section 4.4.13.2.7.2 says that stainless steel jacketing and banding have demonstrated satisfactory performance in fire situations. A number of the...

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