Abstract:In order to evaluate the consistency and reliability of gas flow value transfer in Northwest China, the gas flow comparison was organized and implemented by the North West National Center of Metrology. Xinjiang Institute of Measurement and Testing is the leading laboratory, and other 6 provincial and municipal legal metrology institutions are the reference laboratories. According to the evaluation, the values of En are less than 1, and all of the laboratories are satisfactory. This comparison confirms that the gas flow measurement capacity of each reference laboratory is relatively consistent and reliable, which is conducive to the unity and mutual recognition of gas flow value transmission in Northwest China.