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  1. DJCherre

    Magmeter Accuracy?

    We have two coriolis meters on either end of a pipeline and they are always different by 0.2% of full scale (one always higher). Very consistent. We also have a total flow coriolis on a header serving five coriolis-measured lines. If you add up the five you get the reading of the total flow...
  2. DJCherre

    Saturated steam measurment

    I guess that's about where I was, but thought I'd see if there was a miracle cure. To be honest I wasn't even aware when I wrote this post that we only had 4 total pipe diameters available due to the recent repiping... So I suppose we'll keep trying to improve the calcuation. This flow has a...
  3. DJCherre

    Refrigerant level control

    By diaphragm seals are you referring to what we call "pressure pads" or "remote seals"? Where the pressure-sensing diaphragm is on the end of a tube-like gizmo that you slide into the flange, right up to the process. That sounds like a great idea, since the big problem we're having is the...
  4. DJCherre

    Saturated steam measurment

    Thanks for the replies. First to hacksaw: discharge P is 5-7 psig. We just did a bunch of repiping to decrease DP in the discharge piping to help the jet's recovery, so any meter would have to be low DP. Straight run is lousy, about 6' of pipe available in an 18" line! For accuracy 1000...
  5. DJCherre

    Saturated steam measurment

    Trying to measure the discharge flow from a steam jet ejector. The motive steam is superheated, suction is off of a vessel of boiling water, and I'm told that many attempts to measure the discharge steam flow have failed due to it possibly having water droplets. A vendor of a V-Cone meter told...
  6. DJCherre

    PMI or PMP

    Interesting question... Our plant recently went to PMI on piping, but not instruments. And recently we quickly lost the diaphragms of two brand new hastelloy pressure transmitters in chlorine service. We joked that they gave us stainless, but maybe it wasnt' a joke??? To be honest I'm not...
  7. DJCherre

    Refrigerant level control

    Folks, We have several shell & tube kettle-type heat exchangers where propylene refrigerant is in the shell, process in the tubes. The propylene is flashed to either 70 psig (35 degF) or 6 psig (-40 degF), depending on the exchanger. The level indication/control of the refrigerant is lousy, so...

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