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  1. drials2

    Converting API 650 to API 620 tank

    We are a midstream company and have 2 new 650's that we think may have needed to be 620's. I would think the testing (except for the floor) could all be done after the fact.
  2. drials2

    Converting API 650 to API 620 tank

    Guys, Has anyone ever looked into/done this before? The 650 tanks are on the smaller side (50,000 bpd working capacity) so I am thinking it is at least possible and not out of the realm of possibility. David Rials.
  3. drials2

    API 620 Blanket Gas Issues

    Guys, We have an API 620 tank out it West Texas. The intent of the tank was to gather light condensate (RVP 18 or so) and send it over to our crude stabilizer. I got a question from our pipeline group about the operation of the tank and have been unable to find an answer. I am wondering if...
  4. drials2

    API 650/620 Tank Secondary Containment Issues

    Yes, forgive me, it is stabilized crude condensate (light petroleum liquid).
  5. drials2

    API 650/620 Tank Secondary Containment Issues

    Thanks Duwe6, Which NFPA standard are you siting? (Also, "they" are banking on Class 1 Div 2 electrical for protectation; as a caveat).
  6. drials2

    API 650/620 Tank Secondary Containment Issues

    Guys, I'm running into some resistance when I try to justify why I do not want electrical/process equipment inside the dike walls around tanks. We need a run down cooler to cool some condensate and "they" want to place these coolers inside the dike. Every site I have worked this has not been...
  7. drials2

    De-rating a Vessel

    Again, this was just to satisfy my curiosity. My example was not the best but I think I understand; The MAWP for a section 2, D material does not change in the lower temperature regions BC the allowable stress is not changing. Changing the allowable stress will change your MAWP and possibly...
  8. drials2

    De-rating a Vessel

    The vessel will have a limiting component, agreed. But what I'm wondering is; -If I have the same piece of material as listed above has MAWP conditions of 600F 300psig, if I drop my rated temperature to 200F, does my MAWP increase? That's a simpler way of asking what I am trying to get at.
  9. drials2

    De-rating a Vessel

    This is a general question to satisfy my own curiosity: When taking a vessel (sa-516) and derating the temperature -vessel rated for 600F 300 psig, -only operates at 50F 300 psig, -so derate to 200F how is the new pressure calculated? The allowable stresses dont change in section 2, part D...

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