GB/T 3634.2-2025Hydrogen - Part 2: Pure hydrogen, high purity hydrogen and ultra purity hydrogen (English PDF)
氢气 第2部分：纯氢、高纯氢和超纯氢
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 31, 2025
Implementation date
May 1, 2026
Scope
GB/T 3634.2-2025 is the English-translated version of 氢气 第2部分：纯氢、高纯氢和超纯氢.
GB/T 3634.2-2025 sets the technical requirements for pure hydrogen, high purity hydrogen and ultra purity hydrogen, together with sampling, inspection rules, marking, packaging, transportation and storage, describes the test methods and gives safety information.
It applies to hydrogen obtained by fossil fuel conversion, chemical cracking, as an industrial by-product, by separation and purification of hydrogen compressed natural gas, and by water electrolysis.
Purity is calculated from the total impurity content, itself the sum of the oxygen, nitrogen, carbon monoxide, carbon dioxide, total hydrocarbon and moisture mole fractions.
Oxygen is determined electrochemically, the permanent gases by gas chromatography with helium ionization, flame ionization, flame photometric or plasma emission detectors, and moisture by the dew point or cavity ring-down spectroscopy methods.
It replaces GB/T 3634.2-2011, was issued on 31 October 2025 and has applied since 1 May 2026.
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Document preview — GB/T 3634.2-2025
National Standard of the People's Republic of China
- ICS
- 71.100.20
- Classification
- G 86
- Replacing
- GB/T 3634.2-2011
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- Introduction6
- 1 Scope7
- 2 Normative references7
- 3 Terms and definitions8
- 4 Technical requirements8
- 5 Sampling9
- 6 Test methods9
- 7 Inspection rules11
- 8 Marking, packaging, transportation, storage and safety information12
- References14
1 Scope
This document specifies the technical requirements, sampling, inspection rules, marking, packaging, transportation and storage requirements for pure hydrogen, high purity hydrogen and ultra purity hydrogen, describes the corresponding test methods, and provides safety information for pure hydrogen, high purity hydrogen and ultra purity hydrogen.
This document applies to pure hydrogen, high-purity hydrogen, and ultra-purity hydrogen produced from fossil fuel conversion, chemical cracking, industrial by-product hydrogen, hydrogen compressed natural gas through separation and purification, and water electrolysis.
2 Normative references
The provisions of the following documents constitute the essential clauses of this document through normative references in this text. Among them, for any dated reference, only the version corresponding to that date applies to this document; for any undated reference, the latest version (including all amendments) applies to this document.
GB 190 Packing symbol of dangerous goods
GB/T 3634.1 Hydrogen - Part 1: Industrial hydrogen
GB/T 5099(All Parts) Seamless steel gas cylinders
GB/T 5832.2 Gas analysis - Determination of water - Part 2: Dew point method
GB/T 5832.3 Gas analysis - Determination of moisture in gases - Part 3: The method of cavity ring-down spectroscopy
GB/T 6285 Determination of trace oxygen in gases - Electrochemical method
GB/T 7144 Coloured cylinder mark for gases
GB/T 8984 Gas analysis - Determination of the contents of trace carbon monoxide, carbon dioxide and hydrocarbon in gases - Gas chromatography with flame ionization detector
GB/T 11640 Seamless aluminum alloy gas cylinders
GB/T 14194 Rules for filling of compressed gas cylinders
GB 15258 General rules for preparation of precautionary label for chemicals
GB/T 16804 Precautionary labels for gas cylinders
GB/T 28726 Gas analysis - Gas chromatograph with helium ionization detector
GB/T 28727 Gas analysis - Determination of the contents of trace sulfur compounds in gases - Gas chromatography with flame photometric detector
GB/T 33145 Large capacity seamless steel gas cylinders
GB/T 34528 Regulation for filling of cylinder bundle
GB/T 37182 Gas analysis - Gas chromatograph with plasma emission detector
GB/T 43306 Gas analysis - Sampling guidelines
TSG 23 Regulation on Safety Technology for Gas Cylinder
TSG R0005 Supervision Regulations on Safety Technology for Transportable Pressure Vessel
3 Terms and definitions
This document does not contain any terms or definitions that need to be defined.
4 Technical requirements
The technical requirements for pure hydrogen, high-purity hydrogen, and ultra-purity hydrogen shall comply with the provisions of Table 1.
5 Sampling
Sampling of pure hydrogen, high-purity hydrogen and ultra-purity hydrogen shall comply with the provisions of GB/T 43306.
6 Test methods
WARNING -- During the measurement, hydrogen exhaust gas treatment measures shall be in place to prevent the safety risks associated with hydrogen.
6.1 Purity of pure hydrogen, high-purity hydrogen, and ultra-purity hydrogen
6.2 Determination of the contents of oxygen, argon, nitrogen, carbon monoxide, and carbon dioxide
6.3 Determination of total hydrocarbon content (by methane)
6.1.1 Total impurity content
The total impurity content is calculated according to formula (1), where: x1 -- oxygen content (mole fraction); x2 -- nitrogen content (mole fraction); x3 -- carbon monoxide content (mole fraction); x4 -- carbon dioxide content (mole fraction); x5 -- total hydrocarbon content (mole fraction); x6 -- moisture content (mole fraction); x7 -- total impurity content (mole fraction).
6.1.2 Purity calculation of pure hydrogen, high-purity hydrogen, and ultra-purity hydrogen
The purity of pure hydrogen, high-purity hydrogen, and ultra-purity hydrogen is calculated according to formula (2), where: x -- purity (mole fraction) of pure hydrogen, high-purity hydrogen, and ultra-purity hydrogen.
6.2.1 Determination method
6.2.1.1 The oxygen content is determined according to the method specified in GB/T 6285.
6.2.1.2 The contents of argon, nitrogen, carbon monoxide and carbon dioxide are determined according to the method specified in GB/T 28726.
6.2.1.3 The contents of oxygen, argon, nitrogen, carbon monoxide and carbon dioxide may be determined by other equivalent methods specified in 6.2.2. When there is any objection to the determination result of oxygen content, the method specified in GB/T 6285 shall be the arbitration method. When there is any objection to the determination result of argon, nitrogen, carbon monoxide and carbon dioxide content, the method specified in GB/T 28726 shall be the arbitration method.
6.2.2 Other equivalent determination methods
6.2.2.1 The contents of oxygen, argon, nitrogen, carbon monoxide and carbon dioxide are determined according to the method specified in GB/T 37182.
6.2.2.2 The contents of carbon monoxide and carbon dioxide are determined according to the method specified in GB/T 8984.
6.2.2.3 The oxygen content is determined according to the method specified in GB/T 28726. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB 190Packing symbol of dangerous goods
- GB/T 3634.1Hydrogen - Part 1: Industrial hydrogen
- GB/T 5832.2Gas analysis - Determination of water - Part 2: Dew point method
- GB/T 5832.3Gas analysis — Determination of moisture in gases — Part 3: The method of cavity ring-down spectroscopy
- GB/T 6285Determination of trace oxygen in gases—Electrochemical method
- GB/T 7144Coloured cylinder mark for gases
GB/T 5099 · TSG 23 · TSG R0005
Cited by
- GB/T 47080-2026Test method for the dislocation density of polished single crystal diamond wafers
- GB/Z 168-2026Large capacity fully wrapped carbon fiber reinforced gas cylinders with plastic liners for compressed hydrogen
- GB/T 19158-2025Fully wrapped carbon-fibre reinforced aluminum lined gas cylinders used on containers or skids for transportation or skids for fueling station of compressed hydrogen
- GB/T 28727-2025Gas analysis — Determination of the contents of trace sulfur compounds in gases — Gas chromatography with flame photometric detector
- GB/T 28729-2025Nitrous oxide
- GB/T 3634.1-2025Hydrogen - Part 1: Industrial hydrogen
Editions of GB/T 3634.2
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 3634.2-2025 | Hydrogen - Part 2: Pure hydrogen, high purity hydrogen and ultra purity hydrogen | current edition | Current |
| GB/T 3634.2-2011 | Hydrogen - Part 2: Pure hydrogen, high pure hydrogen and ultrapure hydrogen | previous edition | In force |
This page sells the current edition, GB/T 3634.2-2025. Earlier editions are listed for reference only.
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Related Standards
GB 15258-2009 — General rules for preparation of precautionary label for chemicals
GB 190-2009 — Packing symbol of dangerous goods
GB 1900-2010 — National food safety standards of food additives dibutyl hydroxy toluene (BHT)
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