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  1. airhog

    Handle material 4041 al vs. 6061 steel, corrosion in atmosphere.

    Hello Gibson, My crystal ball tends to work intermittently as well. :) The handle does need to be stronger than the current aluminum one, thus the material change. I am also trying to standardize components so the custom hook (used else where) can still be used and not modified in any way...
  2. airhog

    Handle material 4041 al vs. 6061 steel, corrosion in atmosphere.

    This handle holds a significant amount of weight, therefore making it hollow is not an option. Especially with the recent modifications. It will have to be: Steel Steel with corrosion inhibitor Stainless Steel
  3. airhog

    Handle material 4041 al vs. 6061 steel, corrosion in atmosphere.

    Hello Jtseng123, The reason for the material change is because the handle has been modified with a hook to hang a plate assembly. Because of the weight and the insert used, purchasing the Al handle then modifying the Al handle is expensive. I plan on pricing out some plating options to see...
  4. airhog

    Handle material 4041 al vs. 6061 steel, corrosion in atmosphere.

    ETA: Just to clarify, I meant 4140 steel and 6061 aluminum. Thanks
  5. airhog

    Handle material 4041 al vs. 6061 steel, corrosion in atmosphere.

    Hello, I am currently looking into changing a lifting handle from 6061 aluminum, to a steel handle. The lift handle will be used in a indoor environment. I am wondering if I should just go right to 304SS instead of messing with 4041 and using some type of coating, nickel plating. Costs are...
  6. airhog

    Pressure relief valves and burst valves question?

    Hello Berkshire, The vessel does contain liquid nitrogen. Vpl, my goal is to come up with an alternative solution, without explicitly stating what system i am working on. I do have a pressure vessel design book, however it is a few hundred miles away from me at the moment.
  7. airhog

    Pressure relief valves and burst valves question?

    To answer you question gerald j. It is part of my job description to reduce the costs of this particular system. Upon investigation it looks like the rupture disk and pressure vessel are not designed to asme standards and i was hoping to find out from someone more experienced, why that is the...
  8. airhog

    Pressure relief valves and burst valves question?

    You have not provided sufficient information for anyone to help. In what country/ area are you located? That will givethe codes that apply. What pressure does the tank operate under? What does the nameplate say? Just because you don't think you need both doesn't make it a good idea to remove...
  9. airhog

    Pressure relief valves and burst valves question?

    I can see your point of view. However, I still feel that having both pressure relief systems, when the system in 10+ years old and has never had a NEED to vent is overkill. (not to mention how the rupture disc is well above mawp) I will re-state this "as only using a rupture disc as an...
  10. airhog

    Pressure relief valves and burst valves question?

    Hello, I am currently looking into a nitrogen pressure vessel design and have noticed that is uses a pressure relief valve (set a mawp). It then has a burst valve in parallel (with the relief valve) set above mawp (over 20 percent). Which I believe to be a mistake. My question is, is there...
  11. airhog

    Graduating soon, ramifications of a non-engineering position???

    Thanks for the replies! This has played out much the same as in my mind... I will add that the "tech customer rep" position wasn't local...it was a regional position and I do have some experience in the field. To make matters worse I do have MBA ambitions, however, I have worked hard...
  12. airhog

    Graduating soon, ramifications of a non-engineering position???

    Hello, I am graduating in May with a mechanical engineering degree. I have considered applying for a non-engineering position that requires "Mechanical aptitude" etc. The position is something along the lines of "technical customer service representative". (it is cooler than it sounds I...

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