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 cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. Lijantropo

    Free Vent + Gas reaction

    Dear all colleagues, I am evaluating the required size of a free vent to be installed in a new atmospheric tank. Normally I would follow the API STD 2000 to determine inbreathing/out breathing (including thermal in/out breathing) requirements, and then proceed with a hydraulic calculation to...
  2. Lijantropo

    Partially Filled Pipe Under pressure

    Dear Colleagues, Please see the following discussion related with sealing flow. I believe this could determine which flow makes this system partially-filled or full-filled: http://www.eng-tips.com/viewthread.cfm?qid=177112 I think for an horizontal and vertical pipe, it is possible to use the...
  3. Lijantropo

    Partially Filled Pipe Under pressure

    Good morning, Mr. EnergyMix, It’s not necessary to apologize. I only wanted to clarify that this is not homework in order to continue with the discussion. Moreover, I think of myself as a “student” since I have been working just for few years (5) and I am still learning and understanding new...
  4. Lijantropo

    Partially Filled Pipe Under pressure

    Good morning, Yes I have used it, but the "Manning Equation", the "Open channel flow" and the "partially filled pipe" topics discuss atmospheric gravity lines. Could I use the same equations for system under pressure? Best Regards, Lij.
  5. Lijantropo

    Partially Filled Pipe Under pressure

    Good morning, Mr. EnergyMix, I finished my university a few years ago. This is not a school work. I was evaluating new hydraulic software and among the assumptions used they include “full filled pipe”, so I start wondering, what happens if this is not the scenario. That’s why I created this...
  6. Lijantropo

    Partially Filled Pipe Under pressure

    Hello Dicksewerrat, For the sake of the argument, the control system works.:) However, with regard to your comment: this issue is not only for my imaginary system. If the tank 2 is atmospheric, you still should take into account the inbreathing and out-breathing flows, and size a free vent to...
  7. Lijantropo

    Partially Filled Pipe Under pressure

    Good afternoon, Please find attached a sketch of this “imaginary system”. Let’s imagine that the Second tank, has a control system that keeps the pressure in 50 psig. Now, when the pump starts, the discharge pipe is filled with vapour (or pressurized air, my point is the system is not...
  8. Lijantropo

    Partially Filled Pipe Under pressure

    Hello Dear Colleagues, I'm wondering if it's possible to have a partially-filled pipe but under pressure (no gravity flow). I was thinking of a pair of tanks and a pump. The second tank is higher than the first one, and it operates at 50 psi. The pump have to overcome the static height and...
  9. Lijantropo

    Genereaux Equation

    Thank you all for your answers. My questions are basically on how the factors was estimated (eg "a": annual depreciation on the pipeline, "Le'":factor for friction in fitting), if the equation can be used for any pumping system (centrifugal pumps, rotative pumps, etc), what are the...
  10. Lijantropo

    Genereaux Equation

    Thanks Mr BigInch Mr Shelko. I got the article published on january 2010. But I still have question about the factors. Regards, Lij
  11. Lijantropo

    Genereaux Equation

    Good afternoon, I was reading an article in Chemical Engineering magazine that talked about how to calculate the optimum diameter for a pipe, and it talked about a "Generaux Equation." I was not able to find information on the equation or about the factors. Anyone have information? Regards, Lij
  12. Lijantropo

    Liquid Splash

    Good afternoon Latexman, I think it is important to consider the environment because when the fluid enters the drag causes to require less static column to avoid splattering the roof. Regards, Lij
  13. Lijantropo

    Liquid Splash

    Good afternoon, I'm doing the calculation of a distribution pipe (perforated pipe) and according to my calculations came to the hole with 25 psig. From there the fluid enters a highly viscous media -The distribution pipe is used to mix the fluid inside using pressure- My question: there is any...
  14. Lijantropo

    Mixer power

    Thanks Mr ione for the rar! Lij
  15. Lijantropo

    Mixer power

    Good morning, I have three side entry mixer on a storage tank. Those mixers were designed for homgenize oil (18° API) but now, I want to use them for mix an heavy oil (12° API) and some light oil (45° API). Do you know some expresion to estimate the new energy consumption for that change in...
  16. Lijantropo

    Non newtonian pressure drop

    Good morning, I have been searching in Chemical Engineering Magazine. I found this articles: http://www.che.com/articles/1985-1999/Vol95/chevol95_num18_437.html http://www.che.com/download/facts/CHE_Facts_1208.pdf http://www.che.com/articles/1985-1999/Vol95/chevol95_num18_430.html Regards, Lij
  17. Lijantropo

    Non newtonian pressure drop

    Hi, You're right Mr Latexman, it is shear-thinning. lij
  18. Lijantropo

    Non newtonian pressure drop

    Good morning, I have to pump a non-newtonian fluid (an emulsion). I know some lab properties of the fluids (enough to estimate the apparent viscosity) but I'm not sure of what set of equations I should use. Do you have any good reference where I can find simplified equations for make a good...
  19. Lijantropo

    PSV Relief Requirements

    Good evening, There is a water level because the drums is located next to compressors, and the air is saturated at that point. It will occur some condensation in the drum and if you take into account that we are handle a really big flow, it is possible to reach the 3 ft of water. Regards, Lij
  20. Lijantropo

    PSV Relief Requirements

    Thank you tickle & Ben for your responses. I am trying to do a dynamic calculation to determine what is most important: the vaporization or the increase in the temperature of the air. If anyone have extra information I will appreciate it. Regards, Lij

Part and Inventory Search

Back
Top