Introduction of Liquid Flow Standards Section Fluid Flow Division National Metrology Institute of Japan (NMIJ)

Water Flow Facility

Overview of water calibration facility I - Bird’s-eye view Overflow Head Tank Feed Pumps Circulation Pumps Control Bldg. Working Standard Flowmeters Testing Bldg. Calibration Bldg. Prover Bldg. 5t, 500kg Weighing Tank Bldg. Small Water Calibration Rig 50t Weighing Tank Bldg.

Hydrocarbon Flow Facility

Hydrocarbon Flow (Large) Kerosene Light oil Storage Tank （Light Oil；43m3） Storage tank （Kerosene；43m3） Heat exchanger Diverter/ Weighing Tank/ Balance Servo PD meter SVP Test line Pump Chiller Unit the fluctuation of temperature for 10 min. is less than 0.03 ºC

Flow Calibration Services at NMIJ Water Flow Size Facility Calibration Range BMC (k = 2) Small 10 kg Weighing Tank 0.002 m3/h to 1.2 m3/h 0.039 % Large and Medium 500 kg, 5 t and 50 t Weighing Tanks with Constant Head Tank 0.3 m3/h to 3000 m3/h 0.042 % to 0.060 % Super-Large Reference meters Ball prover 750 m3/h to 12 000 m3/h at 70 C 0.081 % Hydrocarbon Flow (Kerosene and Light oil) Facility Calibration Range BMC (k = 2) Small 2 kg Weighing Tank 0.01 m3/h to 0.1 m3/h 0.03 % (mass) 0.06%(volume) Middle 32 kg Weighing Tank 0.1 m3/h to 15 m3/h 0.02 % (mass) 0.03%(volume) Large 10 t and 1t Weighing Tanks 3 to 300 m3/h 6