ISO 2186:2007 Fluid flow in closed conduits - Connections for pressure signal transmissions between primary and secondary elements
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 5221:1984 Air distribution and air diffusion; Rules to methods of measuring air flow rate in an air handling duct
GOST R EN 306-2011 history
2011GOST R EN 306-2011 Heat exchangers. Methods of measuring the parameters necessary for establishing the performance