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  • Users: rob5377
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  1. rob5377

    station piping 31.3 tied in to the pipeline with higher MOP - reverse flow protection

    Dear All, The gas plant is tied-in to the pipeline A. The gas plant design pressure is P1, and the pipeline A DP is P2. The pipeline after few kilometres will end with the metering station and will be tied to the another pipeline (B) than design pressure is P3 see attached sketch) The Client...
  2. rob5377

    barium sulfate scaling in gas facility - flow test of the well

    Dear All, One of our customers is testing the gas well at this moment. During the test they faced enormous scaling production in flowlines and separator. I have the production water analysis in my hand. The sample was taken from the separator. Among others the water from the separator has...
  3. rob5377

    underground gas flowlines-thermal insulation

    Dear Folks, Does anybody know is it possible to insulate the 4" UG gas flowline. Due to hydrates formation temp=12 deg C the gas will be heated up with indirect heater upstream the choke. I would like to maintain 12 deg C in the flowline to prevent hydrate formation for the next 4 km. Without...
  4. rob5377

    gas well procesing plant - air cooled HE vs S&THE

    Dear all, I am currently working on a plant design for gas well processing plant. It consist of amine washer, 4 stage reciprocating compressor, gas dryer etc. The weather conditions: winter min -25deg C, summer max +30 deg C. For all of above air cooled coolers are recommended (I saw once S&T...
  5. rob5377

    Heavy HC from breathing valve during pipeline pigging

    Dear all, There is a pig receiver at a natural gas plant. Condensate from a pipeline is taken to the vessel through the condesate line with PRV installed. The flashing condensate will get into the vessel causing some HC getting out of the vessel through the breathing valve to the atmosphere...
  6. rob5377

    How to calculate pressure at a given point in the vent header

    Dear All, I am trying to calculate a pressure at a specified point of the vent system header (see point P1 on the attached draft). The purpose of that is to be sure that during the depressurization of HP section of the pipeline connected to the same header as RD, the disk wont rupture. The set...
  7. rob5377

    Rupture disk-can it burst from the other side?

    Hi Folks, It may be a silly question, but there is a discussion about RD bursting. I am wondering if in case of superimposed back pressure bigger than set pressure of RD, the disc can rupture and relief into a tank. Let me explain the situation. Rupture disk is installed on the tank and...
  8. rob5377

    NPSH-pump suction with compensation loop

    Hi All, I was asked to review if existing centrifugal pump handle a new suction line arrangement. Pump used to "suck" water 0.7 meters below pump CL and now a compensation loop going 2.5 meters above pump CL was added. My concern is if i should consider 0.7 or (0.7+2,5) meters in static head in...
  9. rob5377

    Compressed air consumption in flotation unit

    Hello, Does anybody know the rule of thumb for compressed air consumption in air flotation process.For example per cum of contaminated water inlet. I need to estimate compressor size for oily water treatment system at crude oil terminal. Thanks very much
  10. rob5377

    RO downstream or upstream HE/Flowmeter

    Hello, RO has to be installed in circulation pipe for scrubber to reduce circulation flow-rate. There is a heat exchanger and flowmeter installed as well(pump discharge, manual valve, HE, manual valve, flowmeter, manual valve, scrubber) . The question is where is the best place to install RO...
  11. rob5377

    How to boost pressure in cooling water line?

    Hello I need to hook up a new eqp to existing cooling water line. But the pressure in existing line is too small (assume 0.5 barg) I need at least 1 barg at device inlet. Is it possible to hook up a centrifugal pump to line? Then I could supply an equipment with water. Maybe I should use a...
  12. rob5377

    Vaccum in the reactor during stirring - which vacuum pump

    Hello, I have to propose vacuum pump to keep vacuum in the vessel during stirring to degas the batch. Vacuum in the vessel 0.7 0.8 bar. Capacity of vessel is very small - 115 litres. The vessel + installation will be installed on movable skid. I proposed dry running vacuum pump for that...
  13. rob5377

    jaceted vessel - heating and cooling with the same jacked

    Hello I have been reading this forum for ages and I ve found it very helpful many times. This time I would like to ask a question. I have to prepare basic idea for preparation of solution (powder + solvent) in vessel with agitator. The volume is ca. 150 litres. First the batch have to be heated...

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