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  • Users: ajcousins
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  1. ajcousins

    Welding on live equipment - burn-through calcs

    Hello. I am in the middle of writing a procedure/policy for welding on live equipment in a chemical manufacturing facility. From past experience, we used a software (E2G SagePlus) to help with heat transfer during welding to determine the heat input and related welding variables in order to...
  2. ajcousins

    Pyrogel insulation thickness specificiation

    Hello, I'm being asked to specify a thickness of pyrogel insulation on a vessel for heat conservation. Any ideas on how to go about doing this? The operating temp of the vessel is 250F.
  3. ajcousins

    Torquing

    Hello. Can someone give me some guidance on when to specify torque values for heat exchanges and pressure vessels? Thanks.
  4. ajcousins

    Preheat on Weld

    Hello, I'm being asked if preheat is required to weld 5/8" thick CS beveled lifting lugs to the top of a 6" thick SA350-LF2 CS blind flange. My thoughts are no because it's just a bevel, full-pen weld on a 5/8" thick CS plate. Can anyone give input on this? TIA!
  5. ajcousins

    Tightness/leak test of shell-and-tube heat exchangers

    Hello all, We have a handful of exchangers that we're pulling during our next TA to blast and clean the tubes. We want to do a tightness/leak test after we've cleaned them and put the bundles back. My question is what pressure should we bring the shell and tube sides up to? I was thinking 1.1x...

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