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  • Users: I2P
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  1. I2P

    Effect of H2S on hydrate formation curve.

    Friends, I work in a gas processing plant. We recently have encountered a hydrate formation in one of our subsea pipelines. Though a lot of study was made on hydrate prevention, and the requisite KHI dosing was commenced as per guidelines l;aid down, we still had a hydrate problem, whcih...
  2. I2P

    Nitrogen injection in natural gas for Wobbe Index control.

    Friends, Similar to the issue of injecting N2 in LNG, is one of maintaining Wobbe Index of natural gas. I am working in a natural gas processing facility and currently we are having a higher Wobbe Index tyhan allowed by the specs. I have read of injecting Nitrogen in LNG regassing...
  3. I2P

    horizontal separator vessel sizing

    Friends, I have been recently entrusted with the task of making calculations for horizontal separator vessel sizing, its boot sizing etc. basically it is a three phase separator meant for separating water, condensate and natural gas. Since I have lost touch with designing since many...
  4. I2P

    foaming problem in glycol contactor.

    friends, We have a gas glycol contactor which has been experiencing foaming problems recently. What are the causes( apart from hydrocarbon condensation) which result in foaming? what are the remedial causes? A comprehensive answer is welcome.
  5. I2P

    Extened fins heat transfer calculation

    Friends, I am interested in providing a extended transverse fins for a small piece of straight piping on my sealing fluid return line in one of my pumps which has no provision of cooling the hot return fluid. Since we have no cooling water as a utility we are planning to provide fins on...
  6. I2P

    mechanical seal failure of pump with API plan 52.

    Friends, We havew a centrigugal pump handling condensate, and the pump has plan 11 and plan 52 for sealing fliud. Recently we have had a seal failure. I have a few basiic questions. 1.0 On the sight glass provided on the seal return line to the seal pot,we could never observe the...
  7. I2P

    mechanical seal failure in pumps with API plan 52.

    Friends, We havew a centrigugal pump handling condensate, and the pump has plan 11 and plan 52 for sealing fliud. Recently we have had a seal failure. I have a few basiic questions. 1.0 On the sight glass provided on the seal return line to the seal pot,we could never observe the...
  8. I2P

    Dehydration tower inlet gas temperature.

    Presently we are maintaining 50 deg C temp of natural gas at inlet of our dehydration column. The design temp. is 55 degC.Till date we were keeping it 50 to be on the safer side for better water removal through TEG. I would like to know the impact on TEG regeneration system, lean and rich TEG...
  9. I2P

    Flare purge rates

    In order to minimise flaring how do we calculate the minimum purge rate required for the flare header? As I understand the purge is just to ensure no flashback into the header and also to prevent a flame out of the pilot.What data,and calculations are reqd for this? thanks
  10. I2P

    methane absorption in TEG

    We have a tri ethylene glycol dehydration contactors and regeneration units for the same. I have read some literature from US Env. Protection agency regarding the methane losses in glycol operated dehydration towers. Since we are also in the processes of optimisation of dehydration operations...
  11. I2P

    Choke flow condition

    Could any one pl explain the concept of choke flow, and mach number in relation to flow across restriction orifices? What is it's significance in designing the RO? What are the equations which explain the Choke conditions? Any good links for understanding compressible fluid flow?
  12. I2P

    Corrosion monitoring of subsea pipeline and onshore facility.

    Friends, We want to develop a plan for corrosion monitoring of our subsea pipeline as well as onshore gas processing facility. I would like to know from someone who is involved in actual corrosion monitoring of such assets or systems how does one go about it? Presently we have provision...
  13. I2P

    Moisture content of gas spreadsheet

    Dear Hookem, You have replied to a thread on calculation of water content of proces gas, wherein u have offerred to share a spreadsheet which you have developed. I am very much interested in the same. If you could pl forward it to me, my e mail add. is hiren_22in@yahoo.com dear...
  14. I2P

    Monitoring quality of triethylene glycol

    Friends, I am interested in knowing, the degradation of TEG over a period of time. How do we monitor the quality of TEG? what are the laboratory analysis that need to be conducted on regular basis to ensure that the TEG quality has not deteriorated. presently we only check the pH of TEG...
  15. I2P

    orifice installation on produced water line of a slug catcher.

    friends, We have a problem of heavy vibration and hammering in our produced water line from the slug catcher.The slug catcher pressure is 50 bar and the produced water degasser is at 1.5 bar.The line has a on off valve followed by a long piping with a control valve. We have been...
  16. I2P

    Natural gas

    friends, I am working in a natural gas processing plant. We have observed that the filters on our compressor seal gas lines when opened reveal a fine black carbon like powder deposit.Also our flare burns with a sooty flame.I would like to know whether this is expected in natural gas.To...
  17. I2P

    performance monitoring of gas turbine and centrifugal compressor.

    friends, I am interested in making calculations of efficiency for gas turbine driven compressors.I would like a clear detailed reply as to how the manufacturers curves to be used against the actual performance.What is the formula to calculate the head and power consumption, and...
  18. I2P

    Hydrate forming regime.

    Friends, I work in a natural gas processing plant. We have a problem of fouling in our gas gas exchhanger which is a multi pass plate and frame Aluminium brazed exchanger.One stream gets cooled and 3 other streams are warmed up.I would like to know how to determine whether the fouling or...
  19. I2P

    Optimisation of TEG regeneration package

    Friends, We have a glycol(TEG) based contactor and we also have regeneration packages for the same.I have been reading some articles on the net on various aspects of TEG systems.In one such article I read something interesting.The methane loss due to over circulation of TEG.It was good.I...
  20. I2P

    Direct fired heater of TEG package

    Friends, we have a direct fired heater for the reboiler of our TEG regeneration package. It is a natural draft heater. We have frequent problems of burner lockout/flame out.Since we donot have ne great instrumentation,ie we have no draft guages for the heater, we have since begionning...

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