Hello,
We do have a similar problem on a drilling rig.
An existing pipe of 5000 PSI with 5000 PSI working pressure welded in valves.
Some parts of the line and some valves are renewed.
Now is the question do we have to test all to 1.5 X MWP , so 7500 PSI or to 5000 PSI MWP of valves.
Not...