City gas pressure regulators; ICS: 91.140; HS: 90328100
National Standard of the P.R.C., City Gas Pressure Regulators (53 page(s), in Chinese)
This standard replaces the National Standard of the P.R.C., City Gas Pressure Regulators (GB 27790-2011). This standard specifies the terms and definitions, symbols, classifications and marks, structures and materials, requirements, test methods, inspection rules, marks, labels, operation instructions, packaging, transportation and storage of gas pressure regulators for urban gas (artificial gas and natural gas) transmission and distribution systems.