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Hello to everyone, it seems that I post only to solve my troubles, but... I hope I will give soon my feed back! Well, I have to size a pressure safety valve installed downstream an furnace, in wich occurs a partial vaporization of an hydrocarbons mixture. The calculation hypothesis is: outlet...

Thank you Guidoo, I found useful your suggestions about the codes... I just can add this note: there is a specific API guideline, that is API RP 526, in which are stated both stadard orifice areas/diameters and inlet/outlet safety valve connections. So, I think that you guessed right about the...

Hi, I have to size a pressure safety vale for an off-shore platform skid, and reading a technical clarification by client I found this specification: "the PSV inlet and outlet shall be sized as per API 14J requirement". What does it mean? Usually I apply the API RP 520 code for safety valve...

Hi, another question: I have to calculate the release flow rate of a relief valve on a diesel oil storage tank, using the external fire case condition; the set pressure of the valve is 0,35 barg and the tank is pressurized with natural gas. I'm not able to find the entalpy of vaporization for...

Hi, I have to install a flame arrestor on a blowdown line: someone knows if there is an API statement or another technical reference that prevent it? It depends only on pressure drop evaluation? Thank you.

Thank you PremP, but I can't choose a different heater because of the supply specifications that the client gave me. Thanks to all of you for your answers.

I have to design a very unusual natural gas heater for a sea platform skid, that shall be structured in this way: - A jacketed vertical vessel with dyatermic oil inside, heated by an electric resistance, provided by a on-off device; - A natural gas flux trough the jacket, where the gas has to...

Hello, I know that somewhere there are freezing point tables of various water liquid mixtures (eg.: water-glycol, water-ethanol) at different compositions: can someone tell me where is possible to find theese informations (books, articles, etc.)? Thank you.

I use HYSYS 2.2 for my symulations, but I'm not licenced to operate in the dynamic mode; however, Hysys is a very expensive sym software! Do you know another sym software less expensive than Hysys? Thank you.

Thank you svv, but I have to tell you that I actually use Hysys! I know the feature you were talking about and I used it. The problem is that I can't understand the applied method: the heat transfer problem that Hysys solves refers to an external fire case (the mathematical model used by Hysys...

Thank you for your answers; the final pressure wasn't the atmospheric pressure, but this is a value that I posted for istance. I think the problems depends on: 1) The vessel mass 2) The vessel wall thickness 3) The thermal conductivity and the specific heat of the wall material 3) The...

Hello, I have a gas depressuring system in wich a pressure vessel has to be depressurized from about 29 bar to environmental pressure, using a pressure relief valve. This is the question and I wonder if you could help me: do you know a mathematical model that is able to tell me what is the...