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See Chinese contents: GB/T 21451.2-2019 GB/T 21451.2-2019: Petroleum and liquid petroleum products -- Measurement of level and temperature in storage tanks by automatic methods -- Part 2: Measurement of level in marine vessels
This Part of GB/T 21451 provides the accuracy, installation, calibration and inspection guidance for immersive and non-immersive automatic level gauge (ALG), which is adopted for the measurement of level of petroleum and liquid petroleum products, which are transported in marine vessels and with the Reid vapor pressure of less than 100 kPa.
