BS ISO 3354:2008 - Page 2

Measurement of clean water flow in closed conduits. Velocity-area method using current-meters in full conduits and under regular flow conditions. | Status: Current, Proposed for withdrawal

1 Scope This International Standard specifies a method for the determination of the volume flow-rate in a closed conduit by means of the velocity-area method using propeller-type current-meters under the following conditions:

1. a) the velocity distribution is regular (see 6.1.2);
2. b) the fluid is water which is clean or considered to be clean 1);
3. c) the conduit is full;
4. d) the flow is steady 2).

It deals in particular with the technology and calibration of propeller-type current-meters, the measurement of local velocities and the calculation of the flow-rate by velocity integration.