02-12-2024, 03:12 PM
The comment about testing with water makes a lot of sense, because failure in that situation will not send sections of tank in all directions. I would be inclined to pump up with water to twice the maximum pressure you use, which should be controlled by the safety valve and the pressure switch. If the tank survives without leaks I reckon you are probably safe for another five years. I would add that I am not an expert, but long time ago in my working life we used to test steam and hydraulic pipe systems usually at up to twice normal working pressure, the final check being that the pressure did not decay for a period after the test was applied.