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  1. Carlos121

    PSV RBI - Dangerous Fail - Open Above Set Pressure

    Regarding PRD failure mode, can anyone please explain why Open Above Set Pressure (OASP) of a PRD is classified as Dangerous fail in API 581 section 7.1.3 when test point opens above 1.3 times of set pressure? But in ASME Section VIII, Division 1, Para UG 125©(3) stipulates that the PRD shall...
  2. Carlos121

    Query on API 579-1 - Part 3 Brittle Fracture - Level 2 assessment

    Hi, I have a question on API 579-1-Part 3 and hope someone can answer this to me: On clause 3.4.3.1 Step 3 (Determining Stress Ratio, Rts , there are 3 equations (Thickness basis, Stress Basis and Pressure-Temperature Rating Basis). When I calculate each of those three, I will get three...

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