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Recent content by Silje

  1. Silje

    pressure test for piping according to ASME

    hahaha, no, only the new ones.
  2. Silje

    pressure test for piping according to ASME

    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...
  3. Silje

    pressure test for piping according to ASME

    Good news! We have non-boiler external piping. That makes it much cheaper and easier. Thank you Stanweld
  4. Silje

    calculations for non listed valves

    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...
  5. Silje

    pressure test for piping according to ASME

    Hei Stanweld, you mean, that I am in the wrong thread? Could be, I will try pressure vessels, thank you for your hint
  6. Silje

    pressure test for piping according to ASME

    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...
  7. Silje

    life time cycles on name plates?

    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
  8. Silje

    life time cycles on name plates?

    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...
  9. Silje

    ASME 31.3 for valves

    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...
  10. Silje

    B31.3 calculation for unlisted materials

    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...
  11. Silje

    B31.3 calculation for unlisted materials

    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...
  12. Silje

    ASME in China

    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
  13. Silje

    is ASME a law?

    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...
  14. Silje

    heat exchangers of 9 bar inside a pressure vessel of 4 bar

    Thank you all! I checked the parts in B31.1 and in UG 19. Definitely, the heat exchangers must be in ASME. greetings Silje
  15. Silje

    heat exchangers of 9 bar inside a pressure vessel of 4 bar

    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
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