STATIONARY SOURCE EMISSIONS - MEASUREMENT OF VELOCITY AND VOLUME FLOWRATE OF GAS STREAMS IN DUCTS (ISO 10780:1994 (2005), IDT)
This Malaysian Standard specifies manual methods for determining the velocity and volume flowrate of gas streams in ducts, Stacks and chimneys vented to the atmosphere. lt specifies the use of two types of Pitot tubes, type L and type S, for determining the velocity and the volume flowrate, and recommends sampling conditions for which each type of Pitot tube is preferred.
The use of other types of Pitot tubes is permitted in acordance with this Malaysian Standard providing they meet the accuracy requirements in clause 10.
This Malaysian Standard applies to gas streams with essentially constant density, temperature, flowrate and pressure at the sampling Points. lt applies to situations where the Reynolds number of the gas stream as it flows around the Pitot tube is greater than 1,2, the pressure differential across the Pitot tube orifices (ports) is greater than 5 Pa and the Cross-sectional area of the duct at the sampling Point is at least 0,07 m2. lt specifies the technology and ma
