ISO 7145:1982

Determination of flowrate of fluids in closed conduits of circular cross-section — Method of velocity measurement at one point of the cross-section

Specifies a method for the determination of the volume rate of flow of a single phase fluid of a substantially constant density (Mach number 0,25) under steady fully developed flow conditions in a closed conduit of circular cross-section running full by measurement of the flow velocity in a single point.