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See Chinese contents: GB/T 18443.4-2010 GB/T 18443.4-2010: Testing method of performance for vacuum insulation cryogenic equipment -- Part 4: Leak-outgassing rate measurement
This part of GB/T 18443 specifies the requirements of the test principle and method, test devices, equipment and instruments, test conditions and test preparations, test procedures, data processing, test records, and test reports for the measurement of interspace leak-outgassing rate of vacuum insulated cryogenic equipment. This part applies to the measurement of interspace leak-outgassing rate of vacuum insulated cryogenic equipment, such as vacuum insulated cryogenic pressure vessels except for the storage and transportation of liquid hydrogen medium, vacuum insulated cryogenic welded gas cylinders, vacuum insulated pipes and pipe fittings; the measurement of other equipment can be implemented by reference.
