You are not gonna find "ART agreemeents" anywhere. The ART is a document that a licensed engineer (in brazil they have to be members of a council called CREA to be licensed) creates where he states some parameters of the vessel and assumes responsability for its design, so it is a custom made...
Hi SMcI,
In Brazil there are not any codes or standards that are mandatory for pressure vessels, they do have to comply with NR13 but it is mostly about documentation, and some inspection requirements.
Usually vessels are designed based on codes like ASME BPVC, EN 13445, PD 5500, AD Merkblatt...
Hi,
I'm trying to evaluate the design of a cargo tanker using FEA, however I'm struggling to get a good model and boundary conditions to work on.
Traditionally, when doing this by hand calcs, one calculates hoop stress and longitudinal stress from pressure, and then, treating the vessel as a...
Hi,
Usually for the support structures the value used for Fb is 0.6Fy, this is based on AISC Manuals, if you take a look on other procedures on the same book you will find some information about this.
Can't help you with the h dimension though.
Victor
LIAM 7
I think other experienced members may give you better advice, but here is my 10 cents.
It's not about ONLY achieving convergence. You have to fulfill all the requirements of the part. When you multiply your loads for a factor and achieve convergence it means that your equipment maximum...
If you have tubes and shell diameter, you should be able to calculate U using geometric and conduction/convection constants. Sounds like a standard textbook question to me, take a look on some heat transfers books I'm sure you will find the expressions for U there.
PS: This question would be...
Hi
I may be wrong, but as-rolled normalizing seems like when you use plates that have been normalized during its fabrication, I think that in this context, the requirement is to normalize the whole vessel after it is fabricated.
This requirement is probably to avoid hydrogen induced cracking.
Hi, Sorry for the long time to reply this, got busy with some other stuff.
Regarding pressure, yes the code says P is design pressure, but I also found an interpretation which says that MAWP + static head can be use as P. (...
Hi Caloooomi,
Yes, I agree with on that. That's how I design them, I got some proven designs and calculated the FlowRating/FinArea for some different models, not a linear relation though. Changes considerably depending on the flow rate, that why I am interest on understanding the method to at...
When you depressurize a gas, it will tend to expand in order to do that it will steal heat from the surrounds the faster you depressurize the faster this occurs the colder the piping will get, hence the umidity in the air is freezing when this occurs. The defrosting depends on your local...
Managed to get it working. I was seeting hydrostatic acceleration same direction as gravity, when I changed the signal it worked. Loads were very weird before, now its ok. Thank you for your help
Hi Erik
I`m doing statics, but hidrostatic pressure load simulates only the pressure loading (only differs from pressure loading because pressure is inputed as a function of height), and do not consider the stresses generated by the fluid weight, different things.
As I stated this can be...
Hi,
I'm modelling a horizontal vessel and would like to know how to input the weight of the fluid inside. I tried applying hidrostatic pressure, but the mass of the fluid wasn't added, i checked using the probe of force reaction on the supports.
How could I input this mass to be considered?
Hi MJCronin,
I`m not designing this vessel for any client, as I said I'm just studying the case based on some old drawing I found with little information on them.
Material is SA-516 gr70N, CO2 is kept liquid at a temperature of -20 - -29 at pressures from 16-24bar
I`m aware it's not good...
Hi Kevin,
I'm aware this is not a new question, but in my searches never find a good answer, lots of different opinions. Thank you for the links, I was studying the method of EN 13445 which incorporates multiple saddles, but I'm trying to use only ASME VIII-2
From my studies, Part 4 is only...
Hi,
I've been looking at some old drawings of refrigerated CO2 storage vessels, with capacities ranging from 500- 600 tons (DIA 3000-3800, length (30-50m), and all of them had 3 saddle supports.
In the searches I made, I've seen that it is not a good practice to use more than 2 saddles, and...
Hi,
I'm studying Part 5 of ASME VIII-2 and am in doubt about if I am interpreting this correctly. Could you please confirm if I got the idea right?
Here is what I understand.
Type 1 analysis is a eigenvalue buckling situation where pre-stress is from an elastic approach.
Type 2 analysis is a...
Where are you getting this 1.2 factor from?
Results from applying ASME formulas will give you the minimum finished thickness of the head, you must account for losses on thickness due to the fabrication process.
