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...
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...
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...
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...
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...
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...
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...
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
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...
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
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...
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...
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...
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
Thank you very much for all your answers
The only 'problem' of this web page http://www.air-dispersion.com/usource.html is that you dont have an example to contrast and you can't read the theory that goes under these equations.
I suposse that there is not a web or an article or a book as good...
Thank you very much, Morten
But I dont have this "Compressible flow manual" in my posession,I have only the "Flow of fluids Tech Paper 410" and it isn't very clear with this task.
Does anybody know where could I find a clear example similar to my problem?
Best regards & thanks
Juan Antonio
Consider the case in which a gas (natural gas in my case)flows from one line (where it's trapped, this line could be consider a pressurized 'tank') to atmosphere through a vent pipe . This is my case in a compression station and my objetive is to get my discharge line empty in 5 min (or less)...
