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  1. Engineering1012

    API 510 Abandoned-in-place definition and interpretation questions

    Hello all, In API 510 section 3.1.1. the definition for Abandoned-in-place is as follows: A pressure vessel meeting all of the following: has been decommissioned with no intention of future use; has been completely de-inventoried/purged of hydrocarbon/chemicals; and is physically disconnected...
  2. Engineering1012

    NASH Liquid Ring Vacuum Pump

    Has anyone had any experience with makeup water for a total recovery liquid ring vacuum pump system? Through our condensed vapors as well as mechanical seal flush, we still can't seem to maintain the level in the separator. This causes us to keep the initial priming valve opened. The issue is...
  3. Engineering1012

    3 different points on pump curve...not adding up?

    Hello, I have 3 vertical sump pumps at our plant. I've been having trouble finding where it runs on its curve and need some advice. I took amp readings (converted to bhp), NEW gauge dP readings, and downstream flow meter readings, and none of the points really line up on my curve. Any hunches...
  4. Engineering1012

    Unit Reliability Meeting Tips?

    I'd like to hear any of your experiences in holding bi-weekly or monthly reliability engineering meetings. Whether it be for a specific unit in a chemical plant like myself, or other applications. Do you start off with the big hitters of the month? Equipment of focus? Safety...etc? Include...
  5. Engineering1012

    Sump Pump Issue

    New engineer here, this bounces off a question I posted a bit ago on recirc valves and got some help on. Bare with me on the information below. By design, there are three vertical pumps that pull waste from unit buildings and send it to are large atmospheric waste tank. They pump from a sloped...
  6. Engineering1012

    Recirculation line?

    New maintenance engineer here, working at a chemical plant. Currently we have three vertical pumps for a sump in my unit. A primary always runs to maintain sump level at 40% and secondary pump kicks on when sump rises above 60%. The third is a backup. So the main issue is that the primary pump...

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