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ISO/TR 17910:2024PublishedNatural gas — Coal-based synthetic natural gas quality designation and the applicability of ISO/TC 193 standardsISO/TS 18222:2025PublishedNatural gas — Correlation between odorant concentration in air and odour intensityISO 18453:2004PublishedNatural gas — Correlation between water content and water dew pointISO 19739:2004PublishedNatural gas — Determination of sulfur compounds using gas chromatographyISO 20676:2018PublishedNatural gas — Upstream area — Determination of hydrogen sulfide content by laser absorption spectroscopyISO 20729:2017PublishedNatural gas — Determination of sulfur compounds — Determination of total sulfur content by ultraviolet fluorescence methodISO 20765-5:2022PublishedNatural gas — Calculation of thermodynamic properties — Part 5: Calculation of viscosity, Joule-Thomson coefficient, and isentropic exponentISO 20765-2:2015PublishedNatural gas — Calculation of thermodynamic properties — Part 2: Single-phase properties (gas, liquid, and dense fluid) for extended ranges of applicationISO 20765-1:2005PublishedNatural gas — Calculation of thermodynamic properties — Part 1: Gas phase properties for transmission and distribution applicationsISO 23219:2026PublishedNatural gas — Format for data from gas chromatograph analysers for natural gas — XML file formatISO 23333:2025PublishedNatural gas — Upstream area — Requirements and testing of slick waterISO 23335:2026PublishedNatural gas — Upstream area — Determination of hydrate equilibrium temperatureISO 23874:2006PublishedNatural gas — Gas chromatographic requirements for hydrocarbon dewpoint calculationISO 23978:2020PublishedNatural gas — Upstream area — Determination of composition by Laser Raman spectroscopyISO/TR 24094:2006PublishedAnalysis of natural gas — Validation methods for gaseous reference materialsISO 24833:2026PublishedNatural gas — Upstream area — Determination of elemental sulfur solubility by saturated dissolution methodISO 24835-1:2025PublishedNatural gas upstream area — Determination and calculation of shale brittleness index — Part 1: Determination of shale mineral characteristics based on X-ray diffraction methodISO 24835-2:2025PublishedNatural gas upstream area — Determination and calculation of shale brittleness index — Part 2: Determination of shale mechanical characteristics based on triaxial testing methodISO 24894:2026PublishedAnalysis of natural gas — Determination of sulfur compounds — Determination of hydrogen sulfide by laser absorption spectroscopyISO/TR 29922:2017PublishedNatural gas — Supporting information on the calculation of physical properties according to ISO 6976ISO/DTR 5268Under developmentNatural gas — Odorants and Odor characterISO/FDIS 6974-4Under developmentNatural gas — Determination of composition and associated uncertainty by gas chromatography — Part 4: Guidelines and requirements for gas analysisISO/DIS 13734Under developmentNatural gas — Organic components used as odorants for fuel gases — Requirements and test methodsISO/DIS 14111Under developmentNatural gas — Guidelines to metrological traceabilityISO/DIS 22355Under developmentTechnical specifications for coalbed methane polyethylene gathering and transportation pipeline project