This standard specifies measuring performance requirements, meter body requirements, installation and maintenance, site verification testing requirement as well as flow calculation method and measurement uncertainty estimation of ultrasonic flow meters.
This standard is applicable to plug-in gas ultrasonic flow meter (transit-time difference method, hereinafter referred to as flow meter) and is generally used for measurement of natural gas flow in gathering and transportation device, gas transmission line, storage facility, gas distribution system and user metering system. The use of jacket-type gas ultrasonic flow meter may also refer to this standard.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, only the edition cited applies. For the undated reference, the latest edition (including any amendments) applies.
GB 3836.1 Explosive Atmospheres - Part 1: Equipment - General Requirements
GB 3836.2 Explosive Atmospheres - Part 2: Equipment Protection by Flameproof Enclosures “d”
GB 3836.4 Explosive atmospheres - Part 4: Equipment protection by intrinsic safety
GB/T 4208 Degrees of Protection Provided by Enclosure (IP Code) ((IEC 60529)
GB/T 11062-1998 Natural Gas - Calculation of Calorific Values, Density, Relative Density and Wobbe Index from Composition
GB/T 13610 Analysis of Natural Gas by Gas Chromatography
GB/T 17747(All parts) Natural Gas - Calculation of Compression Factor
GB/T 21446-2008 Measurement of Natural Gas Flow by means of Standard Orifice Meter
SY/T 0599-2006 Metallic Material Requirements on Resistance to Sulfide Stress Cracking and Stress Corrosion Cracking for Natural Gas Surface Equipment
JJG 1030-2007 Ultrasonic Flowmeters
IS0 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)
AGA Report No.10 Speed of Sound in Natural Gas and Other Related Hydrocarbon Gases)
3 Quantities, Terms and Definitions
3.1 Quantities
See Table 1 for names and symbols of quantities and units in this standard.
