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  • Users: jchumley
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  1. jchumley

    What does a PE stamp get you?

    My firm sold an industrial system with some heat exchangers, ladders, and platforms, along with the support structure that runs to the ground pads. We had an outside engineer, who is a PE review the designs. All drawings were provided to him in Autocad format. He made a number of required...
  2. jchumley

    C-1008 Carbon Steel - Hardened?

    I work for a manufacturer who builds low pressure (non-ASME) welded plate heat exchangers for gas-to-gas applications. We have a customer who has an abrasive application that we've been selling heat exchangers to for years. Somewhere along the way, a decision was made to change to C-1008...
  3. jchumley

    Aluminum exposed to Air with Citric Acid Fumes

    Anyone know how Aluminum will do when exposed to citric acid fumes? I'm working on a project where we were using 304LSS or 316LSS and now it looks like we might have to go with Aluminum. The problem is the corrosiveness factor. I really don't know if either of the SS are good for citric acid...
  4. jchumley

    Corrosion Resistance of HR CS vs 304LSS vs 316LSS

    As you can see, I'm not a mechanical engineer. I would appreciate it if your responses are in as few non-technical terms as possible. I work for a firm that manufactures air-to-air heat exchangers (recuperators). These are basically welded plate or tubular type recuperators operating at...

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