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Recent content by fd74

  1. fd74

    Material for anhydrous HCl?

    According to your experience, what material should be used for piping with anhydrous HCl? Process conditions are: Temp: -35 to 50 °C ( -31 to 122 F) Press: FullVacuum to 45 bar. Thank you! fd74
  2. fd74

    Overall heat transfer quick estimate

    Thank you very much. I found an additional reference stating a range of 0.2-0.4 kW/m^2*K, so I'll assume 0.2 to be conservative. I guess this won't be far from the truth. Appreciated your support, see you for the next one. FD
  3. fd74

    Overall heat transfer quick estimate

    Hi everybody, I need to quickly estimate the geometry of a jacket for superheating anhydrous hydrogen chloride inside a pipe (assume high pressure gas). Shell-side fluid will be hot water. Can anyone of you suggest me an assumption for overall heat transfer coefficient U? Thanks in advance...
  4. fd74

    Centrifugal pump duty point prediction

    First of all thank you quark. I'm aware of the existence of affinity laws, which can be used, being known one operating curve, to estimate pump behaviour in different conditions (speed, impeller diameter, and s.o.). We are lucky enough to already have those curves from the manufacturer. As...
  5. fd74

    Centrifugal pump duty point prediction

    A centrifugal pump was selected for a certain application for an expexted duty point of 30 m3/h @ 20 m (for those of you not familiar with metric units, don't bother because numbers are not so relevant for the final question). Owing to modifications to the piping during construction, pump is...
  6. fd74

    I need some information of italian chemical engineers

    I attended "Politecnico di Torino" (www.polito.it) in Turin; chemical engineering faculty is one of the most renouned. If you browse through the site you should find a new Master course, in cooperation with a famous Italian Corporate, in the Oil & Petrochemical field. If I were about to begin...
  7. fd74

    SPIRAL MEMBRANES REVERSE OSMOSIS

    Well, a simple answer to your first question: if you are looking for filtration area just browse into a manufacturer's (Osmonics, Dow, Koch, ...)technical documentation, and you'll find that. Maybe this is not what you mean... Salute, fd74
  8. fd74

    Control of flash separation process

    I would like to thank all of you for your tips, project definition is at a very advanced phase so I'll take in consideration all of them trying to make things work. Anyway, to 25632, you are very active in the thread but not being familiar with ammonia and LG technology lead you to wrong...
  9. fd74

    Control of flash separation process

    First, thank you all for your replies. I understand from your comments I've not been so clear in my description of the system, so I'll try to be more precise and answer to all your questions! It's not a refrigeration unit, but a small sized application for ammonia recovery. Oil-laden ammonia is...
  10. fd74

    Control of flash separation process

    I'm currently designing a small unit to separate ammonia from lubricating oil. Contaminated ammonia from storage tank is fed to an electric heater and then to a flash vessel. Oil-free vapour is continuously withdrawn from the top of the vessel by means of an alternative compressor...

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