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See Chinese contents: GB/T 30832-2014 GB/T 30832-2014: Valves -- Test method of flow coefficient and flow resistance coefficient
This Standard specifies the terms and definitions, test equipment and measuring instruments, test requirements, test procedures, calculation and test report for the test of flow coefficient and flow resistance coefficient. The test of flow-pressure loss, flow coefficient and flow resistance coefficient of other similar valves and pipeline shall refer to the methods in this Standard.
