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  • Users: jrthomas
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  1. jrthomas

    Relieving Pressure Too Close To Critical Point

    Here's what I've got: Tank MAWP = 430 psig; Existing PSV set pressure = 420 psig; Critical Pressure of contents (F-404a) = 541.2 psia; Sizing Scenario = Fire Case (F-404a is not flammable, but client wants to see the calcs). OK, so here's my question: How is the relieving pressure calculated...
  2. jrthomas

    Fire Case for Flammable Refrigerants?

    I am currently working with a client to document and review existing pressure-relieving devices per API standards. This particular plant manufactures a variety of both flammable and non-flammable refrigerants, which are stored in 10,000+ gallon tanks. My question is this: Should the pressure...

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