GB/T 22723-2008

This standard provides methods for energy measurement of natural gas by either measurement or calculation, and describes the relevant technologies and measures that must be adopted. The energy calculation is based on separately measuring the quantity (mass or volume) of the natural gas being transported (hereinafter referred to as "gas") and its calorific value (obtained by measurement or calculation). This standard also provides a general method for estimating the uncertainty of energy measurement.
This standard only applies to systems currently in use.
This standard is applicable to any gas metering stations from civil gas to high-pressure gas transmission.
This standard does not exclude the application of new technologies, as long as the technology is proven to be equivalent to or better than the technologies covered by this standard.
Gas metering systems are not the subject of this standard.