Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by STex

  1. STex

    Water, Azeotrope and Hydrofluoric Acid solubility in iso-Butane

    We had a water excursion on our HF Alky recently, which after everything settled down, led to some discussions. I can find curves for the solubility of HF in iso-Butane and I can also find curves for the solubility of water in iso-Butane. I have not been able to find a curve or a means to...
  2. STex

    Bent pipe in lieu of fittings

    metengr, Excellent!! I'll have to bring this to the attention of our materials folks. Much appreciated.
  3. STex

    Bent pipe in lieu of fittings

    metengr, That is also my take on the matter. Unfortunately, my take is not the final say. Part of my search is to find code cases or documented instances of the use of bent pipe in hydrocarbon service with particular emphasis on H2S or HF service. We are currently of the mindset that if we...
  4. STex

    Bent pipe in lieu of fittings

    That's the quandary I've run into. Bent pipe is recognized in the various codes put forth by ASME and ASTM as pipe not as a fitting. But because it is used in the manner of a fitting some want to apply the pertinent fitting specs. Is bent pipe that has been properly fabricated in a...
  5. STex

    Bent pipe in lieu of fittings

    EdStainless, I have seen bent piping in lieu of fittings in catalyst transfer service which for all intents and purposes is not process piping. Failed piping in these locations can typically be replaced without impacting unit throughput. I see the value of using bent pipe in place of...
  6. STex

    Bent pipe in lieu of fittings

    Metengr, Concentrations of HF are around 90% while temperatures range from ambient to ~150F. We are dealing with an HF Alkylation unit. I haven't been able to find any specific guidance condoning the use but on the other hand I haven't found anything prohibiting its use either. API-751...
  7. STex

    Bent pipe in lieu of fittings

    We are having problems locating the proper fittings, especially in larger diameters, for use in hydrofluoric acid service. A106 would seem to indicate that the use of bent pipe is acceptable as long as it meets the material requirements set forth for the pipe specs. My internal inquiries bring...
See more

Part and Inventory Search

Back
Top