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Recent content by JASR76

  1. JASR76

    PSV Fire Case vessel full of liquid

    THATS RIGHT CJKruger !! That was the kind of answer I was waiting for. It was assumed the relief valve was sized as vapour and big enough to assume some of liquid at the initial moments. I dont have DIERS papers in my possesion to know if DIERS suggest some strategy to deal with these kind of...
  2. JASR76

    PSV Fire Case vessel full of liquid

    Thank you, Latexman How would you calculate massrate and which vapour fraction would you consider? Regards JASR
  3. JASR76

    PSV Fire Case vessel full of liquid

    In this particular case: a) we are not at bubble point temp (liquid is subcooled at operating conditions) b) exchanger is always full of liquid and PSV located in this vessel only "sees" liquid c) Fire is the critical case to study So my question is not how to avoid this biphasic relieving...
  4. JASR76

    PSV Fire Case vessel full of liquid

    LAtexman, casto, Thank you for your answers. First of all, the critical case in this safety valve is FIRE, all rest scenarios are very reduced in comparison to this FIRE case. And, by the way, this exchanger in fire is only an excuse to treat an important case for me. FIRE in vessels FULL of...
  5. JASR76

    PSV Fire Case vessel full of liquid

    Thank you very much zdas04 but my question is about considering if this particular fire case in a full liquid vessel(considered as critical case) should be consider as: a) Gas relieving b) Biphasic relieving You know that API 521 size with different equations so, it would be possible that...
  6. JASR76

    Criteria to optimize Skirt-Tapered transition accord, to UW-13

    SNTman & Jte, First of all , thank you very much. You were rigth, i was talking about the "straight flange" or skirt on a formed head with a "taper" between plates of SAME thickness. I know typical lengths are about 1.5" or 2" but I heard once that there is an optimal length related to...
  7. JASR76

    Criteria to optimize Skirt-Tapered transition accord, to UW-13

    Hi all!! A tapered transition or skirt is the crown plate that separates the head (ellipsoidal, hemispherical..) of a cilindrical vessel from the shell (as you already know) My question is , does anybody knows (based on an article or publication) how to calculate the optimal heigth of this...
  8. JASR76

    PSV Fire Case vessel full of liquid

    Pipehead, zdas04, Thank you very much for your answers. The question is as simple as a heat exchanger. Imagine a heat exchanger full 100% of Hydrocarbon that is heated (with the help of some steam )from a pressure P1, temp T1 (liquid phase) to a Pressure P2 (P1-dP) and T2 (liquid phase too...
  9. JASR76

    Rectangular Vessel & Components

    Thank you very much Tom Is possible to design a flange according to Div 1 as a 'single' element? Without attaching it at any other elemnent? Thank you and regards
  10. JASR76

    PSV Fire Case vessel full of liquid

    Hi all!! I have a question about Fire Case in a vessel full of liquid (HX, etc..) engulfed by fire using API 521 recommendations. a) At the beggining the liquid will have a thermal expansion and the PSV will relieve liquid. b) After that, an increase in temp will relieve vapors generated...
  11. JASR76

    Rectangular Vessel & Components

    Hi all, A pair of questions to compress users, 1/ IS it possible to design rectangular vessels according to ASME with COMPRESS software? 2/ IS it possible to design single elements like flanges? Thank you in advance Juanan
  12. JASR76

    Evaluation and design of in-tank mixing systems

    Excuse me for my bad explanations, I’ll try to explain better now: I’m working with a storage tank 50,000 m3 capacity. The fluid inside is gasoil. I’m trying to design three jetmixers identical to get a good in-tank mixing (avoid stratification). I’m using a pump that already exists (this pump...
  13. JASR76

    Evaluation and design of in-tank mixing systems

    TD2K thank you very much for your answer But probably it's not as odd as you think. The density inside the tank and the density in the nozzle is not going to be the same, because when you have fluids like crude, gasoil, etc.. inside the tank the density distributes along its height and for the...
  14. JASR76

    Evaluation and design of in-tank mixing systems

    Hi all!! I have a question about mixing one fluid in a tank. In my case we're working with a big tank (50000 m3) and we're designing jet mixers inside it. Our design involves three nozzles inside the tank that recirculate our fluid inside it. We're using a pump to get this operation. My...
  15. JASR76

    Time to discharge a gas from a tank

    LAtexman, I'm sure he wouldn't sell many books, that's why I asked for a reference and not for a rule of thumb. So I suppose that Milton Beychok's book is the best reference for this task and I am very grateful to Montemayor, MortenA and Quark for their information Thank you all
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