GB/T 18603-2014 Technical requirements of measuring systems for natural gas

GB/T 18603-2001 Technical requirements of measuring systems for natural gas

GB/T 18603-2023 Technical requirements of measuring systems for natural gas

GB 3836.1-2000 Electrical apparatus for explosive gas atmospheres—Part 1:General requirements GB 3836.1-2010 Explosive atmospheres—Part 1:Equipment—General requirements GB/T 3836.1-2021 Explosive atmospheres—Part 1:Equipment—General requirements GB/T 5274-1985 Gas analysis—Preparation of calibration gas mixtures—Weighing methods GB/T 5274-2008 Gas analysis—Preparation of calibration gas mixtures—Gravimetric method GB/T 5274.1-2018 Gas analysis—Preparation of calibration gas mixtures—Part 1:Gravimetric method for class Ⅰ mixtures GB/T 10248-2005 Gas analysis—Preparation of calibration gas mixtures—Static volumetric methods 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 13609-2025 Natural gas—Gas sampling 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 13837-2003 Sound and television broadcast receivers and associated equipment—Radio disturbance characteristics—Limits and methods of measurement GB/T 13837-2012 Sound and television broadcast receivers and associated equipment—Radio disturbance characteristics—Limits and methods of measurement GB 14023-2000 Vehicles,motorboats and spark-ignited engine-driven devices—Radio disturbance characteristics—Limits and methods of measurement GB 14023-2006 Vehicles,boats,and internal combustion engine driven devices—Radio disturbance characteristics—Limits and methods of measurement GB 14023-2011 Vehicles,boats and internal combustion engine—Radio disturbance characteristics—Limits and methods of measurement for the protection of off-board receivers GB 14023-2022 Vehicles,boats and internal combustion engines—Radio disturbance characteristics—Limits and methods of measurement for the protection of off-board receivers GB/T 17281-1998 Natural gas—Determination of hydrocarbons from butane(C4) to hexadecane(C16)—Gas chromatographic method GB/T 17281-2016 Determination of hydrocarbons from butane (C4) to hexadecane (C16) in naturalgas—Gas chromatographic method GB/T 17626.1-1998 Electromagnetic compatibility—Testing and measurement techniques—Overview of immunity tests GB/T 17626.1-2006 Electromagnetic compatibility—Testing and measurement techniques—Overview of immunity tests GB/Z 17626.1-2024 Electromagnetic compatibility—Testing and measurement techniques—Part 1:Overview of immunity tests GB/T 17626.3-1998 Electromagnetic compatibility—Testing and measurement techniques-Radiated, radio-frequency, electromagnetic field immunity test GB/T 17626.3-2006 Electromagnetic compatibility—Testing and measurement techniques—Radiated, radio-frequency, electromagnetic field immunity test GB/T 17626.3-2016 Electromagnetic compatibility—Testing and measurement techniques—Radiated,radio-frequency,electromagnetic field immunity test GB/T 17626.3-2023 Electromagnetic compatibility—Testing and measurement techniques—Part 3:Radiated,radio-frequency,electromagnetic field immunity test GB/T 17626.6-1998 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances, induced by radio-frequency fields GB/T 17626.6-2008 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances,induced by radio-frequency fields GB/T 17626.6-2017 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances,induced by radio-frequency fields GB/T 17626.9-1998 Electromagnetic compatibility Testing and measurement techniques Pulse magnetic field immunity test GB/T 17626.9-2011 Electromagnetic compatibility—Testing and measurement techniques—Pulse magnetic field immunity test GB/T 17626.9-2025 Electromagnetic compatibility—Testing and measurement techniques—Part 9:Impulse magnetic field immunity test GB 17743-1999 Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment GB/T 17743-2007 Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment GB/T 17743-2017 Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment GB/T 17743-2021 Limits and methods of measurement of radio disturbance characteristics of electrical lighting and similar equipment GB/T 17747.1-1999 Natural gas—Calculation of compression factor—Part 1:Introduction and guidelines GB/T 17747.1-2011 Natural gas—Calculation of compression factor—Part 1:Introduction and guidelines GB/T 17747.2-1999 Natural gas—Calculation of compression factor—Part 2:Calculation using molar-composition analysis GB/T 17747.2-2011 Natural gas—Calculation of compression factor—Part 2:Calculation using molar composition analysis GB/T 17747.3-1999 Natural gas—Calculation of compression factor—Part 3:Calculation using physical properties GB/T 17747.3-2011 Natural gas—Calculation of compression factor—Part 3:Calculation using physical properties GB 17820-1999 Natural gas GB 17820-2012 Natural gas GB 17820-2018 Natural gas GB/T 18604-2001 Measurement of natural gas flow by ultrasonic flow meter GB/T 18604-2014 Measurement of natural gas flow by gas ultrasonic flow meters GB/T 18604-2023 Measurement of natural gas flow by gas ultrasonic flow meters GB/T 19000-2000 Quality management systems—Fundamentals and vocabulary GB/T 19000-2008 Quality management systems—Fundamentals and vocabulary GB/T 19000-2016 Quality management systems—Fundamentals and vocabulary GB/T 19000.2-1998 Quality management and quality assurance standards—Part 2:Generic guidelines for the application of GB/T 19001、GB/T 19002 and GB/T 19003 GB/T 19000.3-2001 Quality management and quality assurance standards—Part 3:Guidelines for the application of GB/T 19001-1994 to the development, supply, installation and maintenance of computer software GB/T 19000.4-1995 Quality management and quality assurance standards—Part 4:Cuide to dependability programme management GB/T 21391-2008 Measurement of natural gas flow by turbine meters GB/T 21391-2022 Measurement of natural gas flow by turbine gas meters GB/T 21446-2008 Measurement of natural gas flow by means of standard orifice meter GB/T 21446-2025 Measurement of natural gas flow by means of standardized orifice meter GB/T 22723-2008 Energy determination for natural gas GB 50251-2015 Code for design of gas transmission pipeline engineering GB 50540-2009 Code for construction of pipe process in oil and gas transmission pipeline station SY/T 6658-2021 Using a swirl-type vortex flow meter to measure natural gas flow SY/T 6658-2006 Using a swirl-type vortex flow meter to measure natural gas flow SY/T 6659-2016 Using a Coriolis mass flowmeter to measure natural gas flow rate SY/T 6659-2006 Measuring natural gas flow with a Coriolis mass flow meter SY/T 6660-2021 Measuring natural gas flow using a rotating volumetric gas flow meter SY/T 6660-2006 Measuring natural gas flow using a rotating volumetric gas flow meter JJG 700-1999 Gas Chromatograph JJG 700-2016 Gas Chromatographs JJG 1003-2016 Flow Integration Meters JJG 1055-2009 On-line Gas Chromatograph ISO 10723