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  1. JoeBobJenkins

    Looking for a replacement for bronze sil-brazed unions

    My understanding is that most of the aversion is that it's faster, cheaper, and more shipyards can weld to as good of a quality. I can't vouch for this personally but it's what I'm told. My job was to find a spec that would be for welding. in lieu of sil-brazing. I'll try to find a spec for...
  2. JoeBobJenkins

    Looking for a replacement for bronze sil-brazed unions

    Welding. 1,3,and 4 are out.
  3. JoeBobJenkins

    Is there an equivalent to ASTM D-930 and ASTM D1280?

    Thanks, a few of those might work. We're already working on if F483 cuts the mustard. I'll take a look at the others.
  4. JoeBobJenkins

    Is there an equivalent to ASTM D-930 and ASTM D1280?

    I guess the main question is, will they still be available or does it become a ticking time bomb? We're getting out of the military world and moving toward the commercial. Sometimes if a MIL-SPEC has been canceled, give it enough time and it's no longer available. Don't want to risk the same...
  5. JoeBobJenkins

    Looking for a replacement for bronze sil-brazed unions

    I'm working on a project where what was used before for 3000lb and 1500lb valve end was a navy drawing for silbrazed unions (DWG 1385943 and 1385946). We're looking to go away from sil-brazing and I was hoping to see if there were another option in terms of a spec I can call out. I was looking...
  6. JoeBobJenkins

    Questions on becoming a Piping Engineer

    Thanks. I'm starting in on the design societies. There's a lot more than I expected. I've got a couple of coals in the fire w/ my job but they're largely maybe, if we win the contract. Just looking for avenues that people in the field would suggest so I can steer in a more fruitful direction...
  7. JoeBobJenkins

    Questions on becoming a Piping Engineer

    So I've been in the shipbuilding world, doing a lot of structures work. At the same time I love doing design work so I got fairly good with IV and Femap. Got a little into the Aux world (shipboard hvac, piping, etc.) but largely as a designer/ spec review. I took another job that was heavy on...
  8. JoeBobJenkins

    Questions on becoming a Piping Engineer

    So I want to be a piping engineer. Problem is my career has been in almost anything but, meaning I'm worth a lot in a small sector but my skills aren't demanding of such a salary in the Piping field. I've been able to scratch the surface the past 6 years or so and I find piping really...
  9. JoeBobJenkins

    Is there an equivalent to ASTM D-930 and ASTM D1280?

    I've got instructions stating I need to test aluminum corrosion limits for a cleaner IAW ASTM D-930 or ASTM D-1280. Problem is both of these have been withdrawn and not superceded. I can't seem to find a replacement or equivalent for either. Any hints?
  10. JoeBobJenkins

    Where can I find dessicant data?

    Thanks for the help. I had no idea I could do a search engine check. Now I have the 1.4 million ads I was looking for!
  11. JoeBobJenkins

    Where can I find dessicant data?

    I need to find data on variant types of dessicant materials, (absorption rates in different humidities, etc.). I'm finding it very difficult to find any data on this. Any advice?
  12. JoeBobJenkins

    What causes PRV blowdown?

    thanks, that was my first thought but then I thought how could that be significantly higher than the base pressure. I guess it is.
  13. JoeBobJenkins

    What causes PRV blowdown?

    This might be a stupid question but what causes blowdown pressure? Why would the pressure to open the valve be different than resetting the valve, or at least significantly different?
  14. JoeBobJenkins

    can I show a contour of max stress for all time steps?

    I want to show a contour of the maximum stress for all of the time steps. At time T2 element 1 could be at 60ksi but element 2 is 40. Then at T3 element 1 is 40ksi and 2 is at 60. I want to show a contour that shows both elements at 60 since that's the max they see over the entire time...
  15. JoeBobJenkins

    How do I get membrane stresses out of Abaqus?

    So as far as I can tell membrane stresses are only for solid elements. Continuum elements is a very fancy way of saying shells (I'm sure there's a deeper nuance but as far as I can see not much of a practical difference). So the way I'm trying now is to go to the material and make sure...
  16. JoeBobJenkins

    How do I show stresses from other section points than top and bottom?

    I added in my field output (surface shell elements) the section point 3 of 5. Problem is I'm not sure what I need to do to get the principal stresses from this point to show on screen.
  17. JoeBobJenkins

    How do I get membrane stresses out of Abaqus?

    thought I did, I'm trying to get membrane stresses and Abaqus doesn't seem to have this capability w/o some weird method. In Femap I run a script that comes standard w/ the program and viola I've got membrane stresses. With Abaqus I have to create some crossection path only to have a "paper...
  18. JoeBobJenkins

    How do I get membrane stresses out of Abaqus?

    I've tried the help's linearization steps but I get this error, Results for all the points along the stress line were not found. Selected end points and all intermediate sample points must lie within the current display group, and within solid continuum elements. Due to tolerance...
  19. JoeBobJenkins

    Do Femap contact surfaces/elements transfer easily into Abaqus.

    I'm working on a problem where we initially wanted to use Nastran linear solver but now realize we need to be using contact surfaces. The first thought is to use Abaqus in a non-linear way. We've got beams, bars, bricks, and shell elements all together. Since I currently use Femap I feel...
  20. JoeBobJenkins

    How do I add contact surfaces for a transient dynamic analysis

    I'm doing a transient analysis with an acceleration input. However my model contains many segregated portions that are held together w/ pins and latches. I'm not sure how to set up contact surfaces without having a 3d mesh. I've got tubes joining in a T that are both modeled with plate...

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