The WOL in the picture can only be installed as a "set on" type of fit up. The part of the fitting that goes on the header is contoured to fit the contour of the pipe it's being installed on. Root opening tolerances are in welding procedure specifications. In all my years in the welding...
First, thanks to all for their time in answering my question. Reading between the lines of all answers, I think what everyone is saying is that a DOT audit won't have a problem with the flanges not being in the hydro. Thanks again to everyone, Bigfaz
LittleInch,
the elevation difference is 400', the wall thickness is .500, the test pressure is being monitored at the lowest elevation. The minimum test pressure is 2220psi. The hydro is now complete and the line dried. The flanges were welded back on and the welds x-rayed in accordance of...
New 24" natural gas pipeline in WV, USA.
Inspection had me remove all 600# flanges and weld temporary test heads on prior to hydro of a section of pipeline. Design pressure is 1480psi, material is X65. Hydro pressure was 2400psi due to elevation difference. Inspection said the flanges are...
