GB 17820-2012 Natural gas

GB 17820-1999 Natural gas

GB 17820-2018 Natural gas

GB/T 13611-2006 Classification and essential property of city gas GB/T 11060.1-1998 Natural gas—Determination of hydrogen sulfide content—Iodometric titration method GB/T 11060.1-2010 Natural gas—Determination of sulfur compound—Part 1:Determination of hydrogen sulfide content by iodometric titration method GB/T 11060.1-2023 Natural gas—Determination of sulfur compound—Part 1:Determination of hydrogen sulfide content by iodometric titration method GB/T 11060.2-1998 Natural gas—Determination of hydrogen sulfide content—Methylene blue method GB/T 11060.2-2008 Natural gas—Determination of sulfur compound—Part 2:Determination of hydrogen sulfide content by methylene blue method GB/T 11060.2-2023 Natural gas—Determination of sulfur compound—Part 2:Determination of hydrogen sulfide content by methylene blue method GB/T 11060.3-2010 Natural gas—Determination of sulfur compound—Part 3:Determination of hydrogen sulfide content by lead acetate reaction rate dual photo path method GB/T 11060.3-2018 Natural gas—Determination of sulfur compound—Part 3:Determination of hydrogen sulfide content by lead acetate reaction rate dual photo path method GB/T 11060.4-2010 Natural gas—Determination of sulfur compound—Part 4:Determination of total sulfur content by oxidative microcoulometry method GB/T 11060.4-2017 Natural gas—Determination of sulfur compound—Part 4:Determination of total sulfur content by oxidative microcoulometry method GB/T 11060.5-2010 Natural gas—Determination of sulfur compound—Part 5:Determination of total sulfur content by hydrogenolysis and rateometric colorimetry method GB/T 11062-1998 Natural gas—Calculation of calorific values, density, relative density and Wobbe index from composition GB/T 11062-2014 Natural gas—Calculation of calorific values,density,relative density and Wobbe index GB/T 11062-2020 Natural gas—Calculation of calorific values,density,relative density and Wobbe indices from composition GB/T 13609-1999 Natural gas—Sampling guidelines GB/T 13609-2012 Natural gas sampling guidelines GB/T 13609-2017 Natural gas sampling guidelines GB/T 13610-2003 Analysis of natural gas by gas Chromatography GB/T 13610-2014 Analysis of natural gas composipion—Gas chromatography GB/T 13610-2020 Analysis of natural gas composition—Gas chromatography GB/T 17283-1998 Determination of the water dew point of natural gas—Cooled surface condensation hygrometers GB/T 17283-2014 Determination of the water dew point of natural gas—Cooled surface condensation hygrometers GB/T 22634-2008 Conversion between water content and water dew point of natural gas GB 50251-2015 Code for design of gas transmission pipeline engineering GB 50028-2006 Code for design of city gas engineering GB 50183-2015 Petroleum and natural gas engineering design fire prevention specifications GB/T 17283.1-2025 Natural gas—Determination of moisture—Part 1:Determination of water dew point by cooled surface condensation hygrometers GB/T 13609-2025 Natural gas—Gas sampling GB/T 17283.2-2026 Natural gas—Determination of moisture—Part 2:Determination of water content by oscillation frequency difference method