Working Volume and Nominal Capacity
Working Volume and Nominal Capacity
(OP)
Dear All,
I'm an ealry graduated Mechanical Engineer and In my company I'm working on Design of static equipments as P.Vessel,Tank and Heat Exhangers.
Concerning to Pressure Vessel, I would like to know, if I have a Working Capacity of 13m^3, which one could be a Nominal Capacity that could give me my working capacity?
The pressure of the Vessel is 4 bar,so we have decided to design it with Ellipsoidal heads.
I have considered L=6 e D=2.2 L/D=2.8 and N.C=16m^3.
Would be enough?
Usually,which one should be the difference between Nominal Capacity and Working Capacity?Would be enough 20% ?
Thanks for your help,
Regards
I'm an ealry graduated Mechanical Engineer and In my company I'm working on Design of static equipments as P.Vessel,Tank and Heat Exhangers.
Concerning to Pressure Vessel, I would like to know, if I have a Working Capacity of 13m^3, which one could be a Nominal Capacity that could give me my working capacity?
The pressure of the Vessel is 4 bar,so we have decided to design it with Ellipsoidal heads.
I have considered L=6 e D=2.2 L/D=2.8 and N.C=16m^3.
Would be enough?
Usually,which one should be the difference between Nominal Capacity and Working Capacity?Would be enough 20% ?
Thanks for your help,
Regards





RE: Working Volume and Nominal Capacity
Best regards,
gr2vessels
RE: Working Volume and Nominal Capacity
RE: Working Volume and Nominal Capacity
first of all thank you for your help and your suggestions.
You gave me good points to think about it.
It's first time in our department we are developping pressure vessel design,so we are facing for the first time these problems.
My question was a little bit different,I try to explain.
For Example,according to Api 650,par 5.2.63 fig.5-4 ,to design a Tank,you should consider a Minimum operating Volume(all the fluid that you pump cannot pump it out),then you should consider (according to HSE and Process necessitisy)a "dead" volume over the pump to protect it just in case that problems could occur,then an Overfill protection level.
Finally,your Maximum Capacity is different from the Net Capacity that you desired.
I would like to know,is there any similar way to understand how to design a Pressure Vessel (I mean L and D) when The process decide a desiderable Working Volume?
Thank you all for your help and suggestion.
Thank you all guys!!!
RE: Working Volume and Nominal Capacity
Chicopee somewhat confirmed your supposition about using a 20% difference between nominal and working conditions. I get 16.25m3 for the size, not 16m3. Are you now asking what is a good ratio of length to diameter for your tank?
Also are you aware of forum1529: Translation Assistance for Engineers? You could ask your question over there in another language, if necessary, and get guidance on how to ask it so people here would understand your question.
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RE: Working Volume and Nominal Capacity
First think to understand, the pressure vessels are different from Tanks (storage tanks) and they are subject to different codes.
One of the most important pressure vessel code is ASME B&PV Code.
Two of the most important storage tank codes are API 650 and API 620.
You cannot interchange the terms and codes, as many people tend to name the pressure vessels Tanks. In your first post mentioned pressure vessels and their capacities. Now you drifted in citing paragraphs from API 650, a totally different code.
Clarity is the name of the game in engineering.
Cheers,
gr2vessels
RE: Working Volume and Nominal Capacity
I exactly know the different codes and difference between Storage tank and pressure vessel,it was just an example,I tought you could understand an extrapolation from my post,because API 650 clearly talks about this difference between Working Volume and Nominal Volume; probably I was wrong because I missed to tell you that I was working with ASME VIII,and probably you tought that I misunderstood the codes.
By the way,you gave me good ideas so,thank you!