Don't worry, the tubes are designed for this pressure, but according to PED we only do welding line inspection. We are using these tubes for 40 years and never ever happened something. But for ASME you have to prove by calculation that a tube holds the pressure. The calculations we have done...
Hello,
in B31.3 it is said that all unlisted components like valves and tubes and flanges need the proof by calculation that they can stand the pressure and the heat. There are calculations for the tubes in 341, but not for valves. Do you know an engineering office who can calculate unlisted...
Hello,
In B31.1, there is a leak test, duration 10min, to ensure the quality of our piping. It is in 345.4.3. But it is not clear to me whether an inspector has to come to ensure the test was done, or if our "owners inspector" can sign. Do we have to deliver the test result to our customers or...
We have only a Div.1 vessel. We do the life cycle calculation according to EN13445, because ASME can't give us the calculations for this kind of vessel. That means to me, that we can mention it, but we don't have to, only if the customer asks for it.
Thank you
Hello,
do some of the Americans here knows about the lifetime cycles of a pressure vessel. We have different cycles with pressure and temperature changes, so we always do a FEM approval, that the chamber can stand at least 25000 cycles. In Europe nobody is interested in having this number...
Hello,
we are building sterilizers in Europe. Therefore all our tubes and valves are unlisted according to ASME 31.3. For the tubes it was easy to prove, that they are according to ASME with the calculations in chapter 304. There is a hint in 307 that all valves not listed must be according to...
Thank you Ijzer, absolutely right. Now I have the same result.
But there is still the question about the ch-value. I see, it is the c from calculation 2. It is the sum of mechanical allowances.
An Idea why they used 12.5% and not 0,5 mm at it is described in the explanation for c? With 12,5% the...
Hey engineers,
My company has only unlisted components for tubing. We follow 304 of B31.3 and because there are too many parts, I asked an engineering office to do the calculations for us to prove that the thickness is over the calculated minimum thickness for tubes.
I think, the calculation...
Hi, gr2vessels,
when you are that familiar to GB150, perhaps you can explain to me what is JB4732? It must be a chinese code like GB150, but I am not sure at all. Have you heard about this?
Cheers from Silje
Hello,
I could read once that ASME is mandatory in America, but somebody told me, that ASME is like a law. You have to work exactly according to ASME. For example, the yield strength for the ASME materials are higher than in the European PED. Could I use a European steel with better (means...
at your service, thank you for trying to help!
Siljehttp://files.engineering.com/getfile.aspx?folder=7e8abeee-919c-4a5a-b434-3ac3cd5bd6aa&file=heat_exchangers.jpg
Hi,
the first time that we have to design a pressure vessel with heat exchangers inside in ASME. Our tubes are section 31,3. That means, we can build them according to AD2000 but only the vessel is designed in ASME. Normally the heat exchangers belong to the tubes and we don't need to buy them...
Hi,
my company built a local branch in China. Chinese workers and engineers but they shall use our know-how and the CEO is located in Europe, steering from abroad. Everybody tells us, that we have to use GB150 as the vessels are manufactured in China.
I read in a document of CSEI, that we can...
Hi,
I am confused. My boss sent me a list of the differences between JB and GB standard. I thought that if you are working with China you have to use both simultaneously. Not decide for one.
