This standard specifies the technical requirements, test methods, inspection rules, marking, packaging and storage of air leakage measuring instruments. This standard is effectively used for rotor-type air leakage measuring instruments that are connected to the crankcase that is directly vented to the atmosphere and are composed of a pressure stabilizing box, a flow sensor, and a secondary instrument.
JB/T 5375-1991 history
1991JB/T 5375-1991 Specification for gas leakage measuring apparatus