Testing modified PV level gauge

[abukhaleel]

What is the best way to pressure test a modified pressure vessel level gauge piping? I'll replaced reflex level guages with magnetic types. I've made some modifications to the piping downstream and upstream of the level gauges. The piping upstream of the level gauges are connected to Pressure vessels through welding bosses. The deign pressure of the PV's are 720 & 125 @ 100 oF.

 

[kstaylor]

If there is no way to isolate the level gauges from the vessel you may have to pressure up the vessel in order to test the level gauge piping.