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  1. bobracha

    UCS-79 - Measured Thickness vs Specified

    I have posed the question to them, was curious if anybody else had any experience. I'm still fairly new to PV design, sort of surprised how many things can be left to the discretion of the AI...[surprise]
  2. bobracha

    UCS-79 - Measured Thickness vs Specified

    Per UCS-79(d) we would need to perform heat treatment on heads when the extreme fiber elongation is greater than 5% unless none of UCS-79(d)(1-5) apply. My problem comes with a 1/2” thick (pre forming) head. The manufacturer of the heads would only guarantee and provide papers showing that the...
  3. bobracha

    Welding After PWHT

    I'm having a bit of a debate within my group about whether or not ANY welding is permitted after PWHT without having to heat treat a second time. The situation is this: We have a vessel with 1 1/4" thk shell sections. The rear head had a straight flange thickness of 1 3/8". The head was...
  4. bobracha

    Longitudinal Forces in Horizontal Vessel

    I'm designing a vessel in Compress that will be mounted on a trailer and pulled behind a truck. Therefore, I'm trying to minimize weight and material where possible to keep the trailer loading down. The vessel itself is very light, <5000lbs, so the saddles it will be mounted on don't require a...

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