Welded Pipe Connections to Inlets & Outlets
Welded Pipe Connections to Inlets & Outlets
(OP)
Hello,
I have a 32" OD Section VIII vessel where the Inlets and Outlets are NPS 10" and the Vents/Drain are NPS 3". Because of leak prevension we designed the nozzles to be welded to the piping system rather than use a flanged connection.
However the safety inspector is viewing the connection as an alteration to the vessel.
I thought that was some mention of this being acceptible in Section VIII, but I can not seem to locate it.
Does anyone have an idea where I can clarify, connecting the nozzles to the piping is either an alteration or it is acceptable?
Thanks
I have a 32" OD Section VIII vessel where the Inlets and Outlets are NPS 10" and the Vents/Drain are NPS 3". Because of leak prevension we designed the nozzles to be welded to the piping system rather than use a flanged connection.
However the safety inspector is viewing the connection as an alteration to the vessel.
I thought that was some mention of this being acceptible in Section VIII, but I can not seem to locate it.
Does anyone have an idea where I can clarify, connecting the nozzles to the piping is either an alteration or it is acceptable?
Thanks





RE: Welded Pipe Connections to Inlets & Outlets
RE: Welded Pipe Connections to Inlets & Outlets
The welds, and weld metal, are considered piping.
jt
RE: Welded Pipe Connections to Inlets & Outlets
RE: Welded Pipe Connections to Inlets & Outlets
Connections to the vessel are identified and relevant when determining the vessel scope. Usually the MDR specifies whether the connections were provided as stub ends or with welded flanged/proprietary connections etc.... A properly completed Data Report with any additional info in the remarks section is especially helpful.
But...you got it sorted out....
FAQ731-376: Eng-Tips.com Forum Policies
RE: Welded Pipe Connections to Inlets & Outlets
B31.1 para. 100.1.2(3) "terminal points themselves are considered part of the piping"
B31.3 para 300.1.1(c)"The joint connecting piping to equipmentis within the scope of B31.3."
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RE: Welded Pipe Connections to Inlets & Outlets