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Recent content by pyMorty

  1. pyMorty

    Supercritical fluid reciprocating compression

    Thank you Compositepro. Just to clarify, I´m just talking about recip compressors, which are not suitable for liquids at all. That´s the reason of my question, I´d like to confirm that provided the operating conditions are not in the liquid region it wouldn´t affect as such while being in the...
  2. pyMorty

    Supercritical fluid reciprocating compression

    Hi everyone, Quick question, I work in gas compression services, mainly gas lift with pretty high discharge pressures (up to 3500 psig, three-stage reciprocating compressors), I came across with a analysis of a gas composition we sent for survey a few years ago and noticed it reaches...
  3. pyMorty

    Gas flow equations use for Flare Stack calculation

    Thank you ax1e. I found some interesting books on the subject and realiced there are several specific issues to take into account while sizing flare diameter.
  4. pyMorty

    Gas flow equations use for Flare Stack calculation

    Hi, Can gas flow equations formulas like Weymouth, Pandhandle, AGA, General flow, be used to calculate the flow capacity of a vertical flare just by having P1 and assuming P2 being atmospheric pressure? I mean, it looks to me I can, since at the end it is gas flow through a pipe, but am I...
  5. pyMorty

    Mixing Rule to get critical properties of hydrocarbon mixture

    Thank you rotw and PaoloPemi. I'll keep looking up then.
  6. pyMorty

    Mixing Rule to get critical properties of hydrocarbon mixture

    Hi, I'm trying to calculate decent approaches to saturation pressure of hydrocarbon mixtures (methane to hexane). In an attempt to avoid going through EOS I came across with Antoine equation, which seems to deliver pretty accurate results with pure gases. I wanted to give it a try using...
  7. pyMorty

    Reciprocating compressor package pipe schedule

    Thanks for the advise ax1e. Thank you EdStainless, for sure that clarifies a lot on why to go up on size/schedule on a compressor package even under same base pressure and flow conditions than an offskid pipe.
  8. pyMorty

    Reciprocating compressor package pipe schedule

    Thank you ax1e. Yeah, I´ve heard/read that a lot, Weymounth not being that appropriate, but for some reason it's the one that best accommodates to the real conditions I´ve been involved with, which are precisely the ones it shouldn´t accomodate, piping ranging from 2 to 12" ID, pressures from...
  9. pyMorty

    Reciprocating compressor package pipe schedule

    Thanks for your comments guys. I started as a general question, but you are right, in the case I had on mind the following are the specifics: Flow: 6 MMSCFD Temp. 95 deg F Sweet gas, no tolerance for H2S required Suction: 10" sch 40, 30 psig Firs stage discharge: 6" sch 40, 144 psig, 277 deg F...
  10. pyMorty

    Reciprocating compressor package pipe schedule

    Thank you LittleInch. On the piping connecting the compressor, for example suction, which wouldn’t be subjected to as many forces as it would be in the compression skid, what percentage under the piping max allowable stress would you allow to normally operate?
  11. pyMorty

    Reciprocating compressor package pipe schedule

    I meant to say why do the packager set schedule 80 where it could easily be schedule 40 according to normal operating conditions and max expected (300 psig max). That doubt is keeping me from suggesting schedule 40 for applications of way more pressure, 900 psig for example.
  12. pyMorty

    Reciprocating compressor package pipe schedule

    Hi, I´m working on a spread sheet to calculate required gas pipe diameter for given P1, P2 and flow (I´m ussing Weymouth, for some reason is the one has given more accurate results according to my fiel of job which is gas compression). I´m putting also the recommendation for pipe schedule, and...
  13. pyMorty

    Multi steps gas pressure regulation, compensate temperature drop

    Thank you LittleInch.
  14. pyMorty

    Multi steps gas pressure regulation, compensate temperature drop

    Guys last question on this, just to confirm so what happened in the company I work for, installing two pressure regulators to reduce pressure from 70 kg/cm2 to 7 kg/cm2 was just a waste of money, since the temperature drop will be exactly the same as done with just one valve (with proper Cv)...
  15. pyMorty

    Multi steps gas pressure regulation, compensate temperature drop

    Great, thank you MortenA and LittleInch. Crystal clear.
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