This Malaysian Standard specifies requirements and recommendations for ultrasonic meters (USMs), which utilise the transit time of acoustic signals to measure the flow of single phase homogenous gases in closed conduits.
This Malaysian Standard applies to transit time ultrasonic meters used for custody transfer and allocation metering, such as full bore, reduced area, high pressure, and low pressure meters or any combination of these. There are no limits on the minimum or maximum sizes of the meter. It can be applied to the measurement of almost any type of gas; such as air, natural gas, and ethane.
Included are flow measurement performance requirements for custody transfer and allocation measurement meters.
This standard specifies construction, performance, calibration and output characteristics of ultrasonic meters for gas flow measurement and deals with installation conditions.