Sometimes those systems can be isolated and tested by themselves but sometimes not because it isn't "practical" for any one of several reasons.
According to what I see in your quote of specs you need to bring it up to a specified pressure and hold it there for 2 hrs to validate strength as well as obviously leakage.
Have you ever seen a weak weld, connection, seam, valve, blow under pressure? They peel open pretty good and not necessarily the minute the pressure is applied. Some items, depending upon materials used such as valves, can even have shrapnel because of the way they come apart.
Bottom line: stand clear during testing.
He Is In Control, Have a Great Day, Brent
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