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See Chinese contents: GB/T 18443.2-2010 GB/T 18443.2-2010: Testing method of performance for vacuum insulation cryogenic equipment -- Part 2: Vacuum degree measurement
This Part of GB/T 18443 specifies the test principles and methods, test devices, equipment and instruments, test conditions and preparation, test procedures, data processing, test records and test reports of the vacuum degree measurement of the interspace of vacuum insulated cryogenic equipment. This Part is applicable to the vacuum degree measurement of the interspace of vacuum insulated cryogenic equipment, such as: vacuum insulated cryogenic pressure vessels, vacuum insulated cryogenic welding gas cylinders and vacuum insulated pipes and their pipe fittings, except for liquid hydrogen storage and transportation media. The other equipment may take this as a reference.
