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  1. mafa

    Fiberglass Gasket

    Hello. I understand Fiberglass may be toxic. Can this material be used as gasket material for a Column internals? I am talking particularly about the tray downcomers, in which I have to bolt impingement baffles, for some process reason. The tray manufacturer is offering fiberglass gasket for...
  2. mafa

    Inspection Code API 510 vs. National Board Inspection Code

    Hello, I am preparing a document that will describe the steps to be followed and codes to be used in a modification that we have to perform on a pressure vessel fabricated under ASME Secc. VIII, Div. 1. Basically, we are going to open two new nozzles on a vessel that has been in service since...
  3. mafa

    Pressure Vessels Legs

    Hi everybody! Does anybody know whether exists or not a limit for a vertical vessel´s diameter / height to use LEGS as support? (I am talking about pressure vessels under ASME Secc. VIII, Div. 1). Also, if you have a vessel exposed to seism and wind loads, should you add the thicknesses obtained...
  4. mafa

    Nozzle Openings in existing Manway

    Hi auba, I am in the same situation. There is actually another forum here that is handling the same information (UG-39 in the title). Check UG-39 for the cross-sectional area you need when you open a hole on a blind flange, which is considered a flat head in this case. Apparently it is...
  5. mafa

    What to do when UG-39 doesn't apply

    Hi there, Is it a common solution anyway? to disable an existing nozzle in order to avoid opening a new hole in the vessel? In my case I am being asked to disable a Manhole, and it makes the distance between the next two manholes be 15 meters (49 feet). In this particular case the fact that...

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