组合使用关键词、标准类型、状态与 ICS 分类，快速定位所需国家标准。
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GB/T 30491.5-2026
Natural gas—Calculation of thermodynamic properties—Part 5:Calculation of viscosity, Joule-Thomson coefficient, and isentropic exponent
GB/T 27894.8-2026
Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 8:Determination of hydrogen oxygen nitrogen carbon monoxide carbon dioxide and C1 to C5 and C6+ hydrocarbons by micro-cell thermal conductivity detector
GB/T 17283.2-2026
Natural gas—Determination of moisture—Part 2：Determination of water content by oscillation frequency difference method
GB/T 46553-2025
Natural gas—Analysis of composition by gas chromatography method—Rapid determination of conventional components and sulfur compounds by integrated comprehensive analyzer
GB/T 46546-2025
Natural gas—Guidelines to traceability in analysis
GB/T 46550.2-2025
Natural gas—Determination of odorant—Part 2:Determination of tetrahydrothiophene by electrochemical sensor
GB/T 46550.1-2025
Natural gas—Determination of odorant—Part 1:Determine tetrahydrothiophene and non-sulfur odorant concentration by gas chromatography with photo ionization detector
GB/T 13609-2025
Natural gas—Gas sampling
GB/T 27894.7-2025
Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 7:Rapid determination of helium content using two packed columns
GB/T 17283.1-2025
Natural gas—Determination of moisture—Part 1:Determination of water dew point by cooled surface condensation hygrometers
GB/T 45848-2025
Natural gas—Format for data from gas chromatograph analysers for natural gas—XML file format
GB/T 20604-2025
Natural gas—Vocabulary
GB/T 33296-2025
Quality requirements and test methods for shale gas products
GB/T 32865-2025
Quality requirements and test methods for tight sandstone gas products
GB/T 44561-2024
Petroleum and natural gas industries—Design and testing of LNG marine transfer arms for conventional onshore terminals
GB/T 22723-2024
Natural gas—Energy determination
GB/T 44398-2024
Refrigerated hydrocarbon fluids—Dynamic measurement—Requirements and guidelines for the calibration and installation of flowmeters used for liquefied natural gas (LNG) and other refrigerated hydrocarbon fluids
GB/T 30491.2-2024
Natural gas—Calculation of thermodynamic properties—Part 2:Single-phase properties (gas，liquid，and dense fluid) for extended ranges of application
GB/T 20603-2023
Refrigerated light hydrocarbon fluids—Sampling for liquefied natural gas
GB/T 43503-2023
Natural gas—Determination of oxygen—Electrochemical method