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Recent content by Buchi

  1. Buchi

    Plant Blowdown Starting Pressure

    Hi Maddocks, I think the clients Design practice should take precedence on this. Exxonmobil, for instance, requires that you start blowing down from the maximum operating pressure. I have encounted clients to prefers PSHH set point, which can be like 90% of the MAWP. But for compressors, you...
  2. Buchi

    standard liquid flow rate in HYSYS

    Hi gangs, i have found the answer to my question. so you don't need to bother. Buchi
  3. Buchi

    Flare's, Heat Attenuation, and Water Injection

    Hi DM2, it is not just about flowrate. API 521 explicitly states that the amount of steam required is primarily a function of the following; 1. flare gas composition 2. flowrate 3. steam pressure 4. tip design since tip design is a factor, that was why i suggested you touch base with your...
  4. Buchi

    Effect of HIPPs with PRV as Overpressure Protection

    Hi, The HIPPS according to ASME case 2211 can replace a PRV. This is a case where an instrumented system can be used to replace a PRV. So, HIPPs when used, are proactive and can eliminate a particular relieving load scenario which could have been handled by a PRV. it cuts of the source of...
  5. Buchi

    Flare's, Heat Attenuation, and Water Injection

    Hi DM2, One of the best ways to reduce the heat radiation on the personnel is to assist the flare tip with high pressure fluids like gas injection, water injection, steam injection etc. this is quite common in Low pressure conventional tips or so called open pipe tip which are usually subsonic...
  6. Buchi

    standard liquid flow rate in HYSYS

    Hi all, HYSYS reports two types of "liquid flowrates" in its conditions results tab as follows; 1. std ideal liq vol. flow in barrels/day 2. liq volume flow@std cond.in barrels/day the values assigned to these two conditions are usually close. but my question is, what is the real difference...
  7. Buchi

    OLGA tutorial

    Hi processengineer1998, I don't imagine that you are trying to master OLGA on your own without attending the workshop in SPT group. It is a very complicated software and it seems that OLGA made that complicated to attract users to their training. actually, a trainer confided in me on that. it...
  8. Buchi

    Vent header sizing

    Hi all, I am trying to perform a capacity check on an existing vent header. My largest venting load has been determined. Is there some sizing criteria that one can apply to ensure a suitable vent header size. I know that relief header considers the mach number and the rhov2 criteria in...
  9. Buchi

    Vent system Design

    Hi Guys, Does anyone have useful guides or reference on vent system sizing such as the sizing of the vent header and the vent scrubber? I am more farmilar with flare header sizing using flarenet and flare scrubber sizing using the API 521 criteria. thanks Buchi
  10. Buchi

    Flare stack rating using Flaresim

    Hi all, Has anyone used flaresim lately for performing flare radiation calculation? I am trying to figure how to use this software for rating an existing flare stack i.e, i already know the stack height, and would want to determine what would be the radiation on receptor points for this stack...
  11. Buchi

    Effect of entropy on Process equipment design

    Hi Guys, Can someone help explain to me, in simple terms, the effect of entropy on process equipment design. thanks Buchi
  12. Buchi

    TEG dehydration

    In case you are getting into full blown detailed simulation of the TEG system, I am aware that HYSYS cannot be relied on for such. There are better simulators like ProMax. But like Mortena said, a simple component splitter will suffice if you are just simulating TEG in the overall...
  13. Buchi

    Corrosion inhibitors injection rate

    Hi gangs, can anyone help with calculation method for determining the rate of injecting corrotion inhibitor for a give flowrate through the pipeline. best regards, Buchi Buchi
  14. Buchi

    3 phase separator

    Hi Darsh73, you did not tell us whether your separator is two phase or three phase separator. It makes a whole lot of difference in the calculations algorithm. The vertical separator pretty straight forward: The calculation steps are 1. Determine the maximun superficial velocity (which uses...
  15. Buchi

    SHELL LENGTH FOR VERTICAL SEPARATORS

    Hi gangs, I need some clarification on determining the shell length for vertical separator. I am using seventh edition of API 12J, october 1, 1989. If you see page 13, Appendix C - Design and sizing calculations. There is a table c.1 titled "K factors for determining maximum allowable...
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