Hey All,
We need to Hydrotest a pipeline that has some large elevation changes. ( approx. 1500 ft)
The pipe line will be in nitrogen when we begin to fill it with water for the Hydrotest.
Our current plan is to maintain a nitrogen backpressure on the filling pigs so the line does not go slack...
Can someone either point me to a resource or explain clearly when transition pieces are required between pipes of either different grade or wt?
1) Say I wanted to join an 8" Pipe .188 wt X-52 to 8" .500 wt X-52. Would I need a transition spool?
2) How about 8" .250 wt Grade B to 8" .500"...
As part of our gathering system we have centrifugal pumps that feed oil down a 4 mile line to a storage Tank. From the tank we have a PD pumps that move the oil farther down the system.
Due to the high cost of tank maintenance/inspection we are discussing tightlining around the tank.
I am...
