All pressurized piping must have leak detection. Regulations
require
ONE leak detection method from EACH of the
following sets
Set 1: Automatic Line Leak Detector Systems
Set 2: Other Methods
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The automatic line leak detector used must be able to detect a leak at least as small as 3 g/hr at a line pressure of 10 pounds per square inch. It must then respond within 1 hour by shutting off the product flow, restricting product flow, or triggering an audible or visual alarm.
The line tightness test must be able to detect a leak as small as 0.1 g/hr when the line pressure is 1.5 times its normal operating pressure.
The ground water, vapor, and interstitial monitoring systems have the same regulatory requirements for piping as they do for tanks.
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