GB/T 27894.7-2025 Active National standards

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 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

Publish Date: 2025-08-29 Implement Date: 2026-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 27894.7-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Natural gas

ICS Name: Natural gas

Publish Date: 2025-08-29

Implement Date: 2026-03-01

Pages: 20 pages

Scope

This document describes a method of using two packed columns to quickly determine the helium content by gas chromatography.
This document is suitable for the rapid determination of helium content in different types of natural gas, such as wellhead natural gas, pipeline natural gas, raw gas from processing plants, and processed natural gas, as well as similar gas mixtures, with a mole fraction range of 0.005% to 40%.

Development Information

Word Count: 24 Thousand words Pages: 20 pages

Referenced Standards

GB/T 4946-1985 Terms of gas chromatography GB/T 4946-2008 Terms of gas chromatography 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 14850-1993 Gas analysis—Vocabulary GB/T 14850-2008 Gas analysis—Vocabulary GB/T 14850-2020 Gas analysis—Vocabulary GB/T 20604-2006 Natural gas—Vocabulary GB/T 20604-2025 Natural gas—Vocabulary GB/T 27894.1-2011 Natural gas—Determination of composition with defined uncertainty by gas chromatogramphy—Part 1:Guidelines for tailored analysis GB/T 27894.1-2020 Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 1:General guidelines and calculation of composition GB/T 27894.2-2011 Natural gas—Determination of composition with defined uncertainty by gas chromatography—Part 2:Measuring-system characteristics and statistics for processing of data GB/T 27894.2-2020 Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 2:Uncertainty calculations GB/T 27894.3-2011 Natrual gas—Determination of composition with defined uncertainty by gas chromatography—Part 3:Determination of hydrogen,helium,oxyen,nitrogen,carbon dioxide and hydrocarbons up to C8 using two packed columns GB/T 27894.3-2023 Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 3:Precision and bias GB/T 13609-2025 Natural gas—Gas sampling

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