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  • Users: Silje
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  1. 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...
  2. 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...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. Silje

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

    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...
  8. Silje

    ASME in China

    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...
  9. Silje

    GB150 vs JB 4732

    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.
  10. Silje

    ASME VIII Devision 1 or 2

    Hello, I am reading a comparison of different standards. ASME VIII Division 1 gives more strength, Devision 2 has not the same calculations as EN13445 or PD 5500, but gets the same results. But how do I know which division I shall use when a customer asks me to work according to ASME ? Silje
  11. Silje

    pressure vessels to the Ukraine

    Hello, does anybody knows whether it is possible to deliver pressure vessels with AD or EN13445 to Ukraine? Is there anything else the Ukraine strictly wants or does not allow ? For example, I have learned now that Russia accepts AD, but not absolute. The x-ray test must be 25% even if in AD...
  12. Silje

    Russian GOST vs. PED

    Hei, we have a customer in Russia who wants us to deliver a pressure vessel according to PB 03-576-03. We can deliver immediately but only with PED (european pressure vessel guideline). What is the difference ? I know PED is accepted in Russia with GOST license but how to explain to the...
  13. Silje

    ASME design from Chinese supplier to chinese market

    Hello, we found a Chinese company building pressure vessels and all equipment around for us. We deliver the drawings and the know-how and they will build them. The vessels are only for the Chinese market, but as we are responsible we design in ASME and asked them to build in ASME. I know that...
  14. Silje

    Hello, we want to deliver a cylind

    Hello, we want to deliver a cylindrical pressure vessel for hot water sterilization to Melbourne. We were told that it is no problem to design according to ASME, the piping does not need any specific consideration at it is not under pressure. Is it necessary to design according to seismic...

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