This question 7 is in continuation of question 6 in which we started explaining why an active vacuum leak detection system is superior over an active pressurized system. Active leak detection systems can be either a pressurized system, in which an inert carrier gas stream flows through the leak detection circuits most probably only via the machined leak detection grooves present in the carbon steel and a vacuum system, where one pulls vacuum pressure underneath the liner.

We recommend a vacuum based leak detection system for several reasons:

Reason #2: Direct detection of the complete carbon steel surface

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