SY/T 6659-2006 (English Version) PDF

Scope: This standard specifies the measurement conditions, measurement performance, technical requirements, use, installation, maintenance, and real flow calibration methods of Coriolis mass flowmeters used to measure natural gas flow, and gives gas mass flow and standard reference conditions. Calculation method and uncertainty estimation method of volume flow rate and energy flow rate. This standard applies to Coriolis mass flow meters (hereinafter referred to as flow meters) that measure natural gas flow. Typical applications include natural gas extraction, processing, transportation, storage, distribution and other production processes and terminal gas metering systems. The natural gas measured by the flow meter is a single-phase gas, and its true relative density is 0.55 to 0.80. The standard reference conditions for natural gas volume flow calculation and calorific value calculation used in this standard are: pressure is 0.101325MPa (absolute pressure) and thermodynamic temperature is 293.15K. Other reference conditions specified in the contract may also be used.

SY/T 6659-2006 Referenced Document

GB 3836.2-2000 Electrical apparatus for explosive gas atmospheres-Part 2: Flameproof enclosure "d"
GB 3836.4-2000 Electrical apparatus for explosive gas atmospheres. Part 4: Intrinsic safety“i”
GB 4208-1993 Degrees of protection provided by enclosure (IP code)
GB/T 11062-1998 Natural gas--Calculation of calorific values, density, relative density and Wobbe index from composition
GB/T 13610-2003 Analysis of natural gas by gas Chromatography