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  1. MDS N SONS

    Dimple Jacket Proof Test

    We are fabricating a pressure vessel to Section VIII Div 1 which will have a dimple jacket. We plan to proof test per UG-101(m). It will be an embossed plate, plug welded to a plain plate. Welds are being looked at per UW-19(c)and the plain plate as a stayed surface per UG-47. We will calculate...
  2. MDS N SONS

    90 deg Conical Head

    The dimple jacket is existing. It's shot so we are removing it and replacing it with a conventional wall jacket. The vessel is code stamped and the new jacket needs to comply with Sect. VIII and will be considered an alteration and will be "R" stamped.
  3. MDS N SONS

    90 deg Conical Head

    Sketch attachedhttp://files.engineering.com/getfile.aspx?folder=8f1d7da9-d717-4f78-93f2-3fd1a1f79eff&file=jacket_sketch.pdf
  4. MDS N SONS

    90 deg Conical Head

    Our client has an existing pressure vessel with a 90 deg included angle conical bottom head. It currently has a dimple jacket. They want to remove the dimple jacket and install a convention jacket on the bottom cone. There will be a closure ring at the top and bottom of the jacket cone. Does the...
  5. MDS N SONS

    Welding SA-312 TP321H pipe to SA-182 F9 Socket Weld Valve

    Got it. Thank you Metengr!
  6. MDS N SONS

    Welding SA-312 TP321H pipe to SA-182 F9 Socket Weld Valve

    OK, we typically use ERNiCr-3 for some of our other dissimilar procedures so I'll probably go with that. Am I on the right track for preheat and PWHT?
  7. MDS N SONS

    Welding SA-312 TP321H pipe to SA-182 F9 Socket Weld Valve

    I've got the subject scenario to do. I need to qualify a weld procedure. Planning on 400°F preheat and 1350°F or so PWHT. Having some difficulty picking the best filler metal. Line will be in high temperature steam service. I was thinking either going matching the lower alloy and using ER80S-B8...
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