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  • Users: carletes
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  1. carletes

    Tanks overflow protection

    Thank you. I have read that API again and I don't see it clear. In appendix B.4 it says regarding overfill level that this "the level at which any additional product will overflow and spill out of the tank and/or in the case of a floating roof tank the contact or damage will occur between the...
  2. carletes

    Tanks overflow protection

    Dear all, I have some doubts regarding overflow protection of storage tanks apart from the level gauges and similar protections. I mean, in case level control fails whether it is uasual to provide another menas of protection such as overflow slots or similar. In my case I am working with fixed...
  3. carletes

    LPG pumping

    Any book o publication explaining how to calculate that transient until the equilibium is reached again during which the pressure inside the LPG vessel being emptied or filled is not coincident with equilibrium pressure? Best regards
  4. carletes

    LPG NPSHA CALCULATIONS AND SOLUTIONS

    Hello again, Related to this matter, does anybody know of recommended LPG loading rates into rail cars and trucks depending of the type of filling or where to find them? (i.e bottom, with or without vapor return, etc) I have been looking for them with no result. Thank you.
  5. carletes

    LPG pumping

    Dear all! I am facing a propane and butane bulk transfer system from horizontal bullets vessels towards rail tank wagons with no vapor return line. As far as I know in steady state the pressure inside the LPG vessels will depend only on their temperature and will be coincident with the LPG...
  6. carletes

    LPG NPSHA CALCULATIONS AND SOLUTIONS

    Thank you very much for all the answers. I see that the installation of vapor return line or a recirculation line into the supply vessel (according to dcasto experience) highly depends on pumping rate, vessels volumes, ambient temperature... If the pumping rate is very low I suppose that...
  7. carletes

    LPG NPSHA CALCULATIONS AND SOLUTIONS

    25632, I suppose that the pressure decrease will be accompanied by a cooling effect at vapor space, but I am not so sure that the temperature of the liquid being pumped will be affected instantaneously... Answering to MJCronin it is my first experience with LPG pumping and it is for a project...
  8. carletes

    LPG NPSHA CALCULATIONS AND SOLUTIONS

    Hello again, I was not considering the installation of a vapor return line after reading some recommendations such as the following link, about not installing a vapor return but using spray filling in the vapor space. http://ts.nist.gov/WeightsAndMeasures/upload/LPG-Chptr2May-05.pdf Anyway...
  9. carletes

    LPG NPSHA CALCULATIONS AND SOLUTIONS

    Dear all! I am facing a propane and butane bulk transfer system from horizontal bullets vessels towards rail tank wagons with no vapor return line. As far as I know in steady state the pressure inside the LPG vessels will depend only on their temperature and will be coincident with the LPG...
  10. carletes

    LPG storage-spheres/bullets

    Hello, I have usually seen in refinery LPG storages the use of both spheres and bullets. Which is the reason for combining both types of storages? I have been told that LPG refinery production goes to spheres from which is stored in bullets and LPG are exported from this bullets towards the...
  11. carletes

    Storage tanks bottom types

    Hello again, The tanks I am working are: Crude oil storage: diameter 65 m kerosene: diameter 40 m Diesel: 64 m Gasoline: 45 m Naphta: 30 m Regards
  12. carletes

    API 650-Bottom shape selection

    Dear all, I have seen storage tanks (crude oil, diesel, kerosene,..) which have different bottom types: some of them have conical shape (slope approx. 1:120) with the tank center being the highest point and a drawoff sump near the shell but in other cases the bottom has inverted conical shape...
  13. carletes

    Storage tanks bottom types

    Dear all, I have seen storage tanks (crude oil, diesel, kerosene,..) which have different bottom types: some of them have conical shape (slope approx. 1:120) with the tank center being the highest point and a drawoff sump near the shell but in other cases the bottom has inverted conical shape...
  14. carletes

    Storage tanks bunds draining during fire

    Dear Pennpiper, Thanks a lot for your answer. Effectively, with bund I wanted to mean the diked area around the tanks used as containment for any spillage. In my case I have several dikes. For example one of them includes three tanks of 200000 bbl of gasoline (heigth 20 m, diameter 45 m). My...
  15. carletes

    NFPA 30 Diking capacity

    Dear all! I am dealing with the sizing of the required capacity of the impoundment (diked) area around two crude oil storage tanks. I know that according to NFPA 30 it must be as a minimum equal to the largest tank volume. My question regards to the fire fighting water storage. I thought that...
  16. carletes

    Storage tanks bunds draining during fire

    Dear all! I am dealing with the sizing of the required capacity of the impoundment (diked) area around two crude oil storage tanks. I know that according to NFPA 30 it must be as a minimum equal to the largest tank volume. My question regards to the fire fighting water storage. I thought that...
  17. carletes

    Steam accumulator sizing

    Dear all!! I am designing my first steam accumulator for a thermosolar power plant. Could anybody suggest me any publication, code, etc with good documentation and rules about it? Thanks and best regards
  18. carletes

    DIN Flanges Pressure Ratings

    Dear all! I am quite used to ANSI standards but now I have to deal with a piping project with DIN pipes. I am looking for something similar to ANSI B16.5 but DIN, where I could find for the different materials the temperature-pressure ratings and maximum operating temperatures. Does anyone know...
  19. carletes

    Supposrted Cone Roof Design

    Dear all! I am quite new in API 650 design, and I have a question about supported cone roof design. Is there any API publicatiosn regarding this issue? (rafters design, compression ring, shell to roof junction, etc) because I think it is not included in API 650. Or perhaps there is any other...
  20. carletes

    P91 welded pipe

    Dear davefitz, So in your opinion a welded P91 pipe with a correct N+T can substitute a seamless pipe? I thought so, but, surprisingly, ASME B31.1 permits the use of A691 pipe for non-bolier external piping but not in the case of bolier external piping (ASME I)when the design conditions are...

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