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  1. Mche

    Restriction Orifice

    jamiej1, You can provide two RO in series such that the flashing/caviation/noise can be avoided. This will be cheaper way than providing valves. Regards,
  2. Mche

    Hydrogen service lines

    Following I note from various references I could read in last few days. If a process engineer has to participate in design of a system where hydrogen is one of the components then he/she should, at least, 1.Specify hydrogen partial pressure in process data sheet 2.Based on operating...
  3. Mche

    Hydrogen service lines

    Thanks all for your useful information. One more reference which I could locate is... "Material Selection for Petroleum Refineries and Gathering Facilities" by Dr. Richard A. White
  4. Mche

    Hydrogen service lines

    Montemayor, You guessed it correctly, I needed answer from Process Design point of view which I got from above. However I am curious about impact of hydrogen on mechanical design also. Is there anything additional, that Process Engineer can do than mentioning presence of Hydrogen and its...
  5. Mche

    Hydrogen service lines

    Hi, Are there any specific design criteria to size Hydrogen service pipe lines such as velocity, Pressure Drops etc.? We attempted to optimize line sizes using indutry norms, but were questioned for basis. Don't have any specifc references to answer back. One thought of is API RP 14E. However...
  6. Mche

    Flow thru Full Open Control valve, Liquid Service

    Centrifugal pump operating at recycle flow. Minimum flow control valve (fails and) opens 100%. How to estimate flow for this situation? Assume pump will not trip on motor overload. Expectedly pump will operate between minimum flow point to normal operating point along its performance curve...
  7. Mche

    Hot Oil System Specification

    Please suggest reading material and useful information for developing general purpose Hot Oil System duty specification. Preferably on internet. Thanks.
  8. Mche

    Bowing in cryogenic piping

    HI everybody ! Is there any criteria to decide when bowing is likely to occur in pipe line carrying cryogenic liquids? Regards, MST
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