Development of primary standard for hydrocarbon flow and traceability system of measurement in Japan

It is of importance to establish the hydrocarbon flow standard which acts as the basis for vast dealings and taxation for hydrocarbons, enforcement of the policy on energy savings and high quality management of industries. As a result of investigation into calibration methods, reliability, and effectiveness, the specification of the national primary standard and the traceability system for hydrocarbon flow in Japan was designed. We took the technical initiative in establishing the traceability system using JCSS (Japan Calibration Service System) as basis of the national primary standard in the limited region of flow rates and various kinds of liquids. The national primary standard of high accuracy and safety has been developed. This project was evaluated through verification of international consistency by way of international key comparisons.