This standard specifies the shape and method of use (installation in equipment and operating conditions) of a critical penturi nozzle (hereinafter referred to as CFVN) when determining the mass flow rate of gas flowing through equipment.
JIS Z 8767:2006 Referenced Document
ISO 5167-1:2003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1: General principles and requirements
ISO 5167-2:2003 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 2: Orifice plates
ISO 6976:1995 Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition
ISO/TR 5168:1998 Measurement of fluid flow - Evaluation of uncertainties
JIS Z 8767:2006 history
2006JIS Z 8767:2006 Measurement of gas flow by means of critical flow Venturi nozzles