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  1. VQ35

    Div 2 Variable thickness nozzle reinforcement

    Is someone able to explain to me if the following is a feature or a bug in Div 2? I am designing a Div 1 vessel and using Appendix 46 for some large nozzle openings. I made 2 identical nozzles of variable thickness in the same vessel. Same orientation, projection, etc. If I add a relatively...
  2. VQ35

    CSA B-51 figure 1a interpretation for Dimple Jacket

    The governing distance in your application has nothing to with the diameter of the vessel. Your fluid layer is thin and the shape is most similar to an obround vessel, the dimples behave as stays. I'd say the governing distance could be the pitch of the dimples, but your best to confirm with the...
  3. VQ35

    Are sample pots excluded from ASME VIII?

    What jurisdiction is applicable? What size of sample pots are you envisioning?
  4. VQ35

    B31.3 Weld Metal Impact Test Exemptions

    You will calculate coincident ratios for the 2 parts you are joining. The maximum of those coincident ratios gives you your allowable reduction per Figure 323.2.2B That reduction (say it is 50°F) is applied to each of your components. Pipe: -20°F - 50°F = -70°F (but limited to -55°F per...
  5. VQ35

    Manganese build up in weld deposit

    ironic, I'm curious why you conclude "don't worry about the manganese". I expect you'd agree that there are more important properties that could be measured from the completed weld metal. In our application we did find a crude correlation between toughness and Manganese content. That said, I do...
  6. VQ35

    Manganese build up in weld deposit

    What type of electrode coating? How many passes to complete a joint? I've experienced similar results with SA516-70N but using SAW process and the flux played a significant role. Base metal was 1.4%, wire was <1.25% as per AWS A5.17 EM12K, but we had results as high as 1.95% in our deposited...
  7. VQ35

    Sec VIII Div 1 Appendix 47

    Hi James, I'm surprised to find this thread so quiet, I'd been assigned the same task as you in my organization. Things got busy towards the end of the year and this task got pushed. What is your take on Table 47-5-1, specifically "Design due to seismic reactions"? The sub-bullets a) and b)...

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