Standard No.:	GB 18047-2026
English Name:	Compressed natural gas as vehicle fuel
Chinese Name:	车用压缩天然气
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2026-07-30
Implemented on:	2027-8-1
Status:	to be valid
Superseding:	GB 18047-2017 Compressed natural gas as vehicle fuel
Target Language:	English
File Format:	PDF
Word Count:	12500 words
Translation Price(USD):	375.0
Delivery:	via email in 1 business day

GB 18047-2026 Compressed natural gas as vehicle fuel English, Anglais, Englisch, Inglés, えいご 1 Scope This document specifies the quality requirements, sampling, test methods, inspection and judgment rules, storage, transport and use of compressed natural gas as vehicle fuel. This document applies to compressed natural gas as vehicle fuel. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 11060.1 Natural gas - Determination of sulfur compound - Part 1: Determination of hydrogen sulfide content by iodometric titration method GB/T 11060.2 Natural gas - Determination of sulfur compound - Part 2: Determination of hydrogen sulfide content by methylene blue method GB/T 11060.3 Natural gas - Determination of sulfur compound - Part 3: Determination of hydrogen sulfide content by lead acetate reaction rate dual photo path method GB/T 11060.4 Natural gas - Determination of sulfur compound - Part 4: Determination of hydrogen sulfide content by loxidative microcoulometry method GB/T 11060.5 Natural gas - Determination of sulfur compound - Part 5: Determination of hydrogen sulfide content by hydrogenolysis and rateometric colorimetry method GB/T 11060.8 Natural gas - Determination of sulfur compound - Part 8: Determination of hydrogen sulfide content by hydrogenolysis and rateometric colorimetry method GB/T 11060.10 Natural gas - Determination of sulfur compound - Part 10: Determination of sulfur compounds using gas chromatography method GB/T 11060.11 Natural gas - Determination of sulfur compound - Part 11: Determination of hydrogen sulfide content by length-of-stain detector tubes method GB/T 11060.12 Natural gas - Determination of sulfur compound - Part 12: Determination of hydrogen sulfide content by laser absorption spectroscopy GB/T 11060.13 Natural gas - Determination of sulfur compound - Part 13: Determination of hydrogen sulfide content by ultraviolet absorption method GB/T 11062 Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition GB 13392 The vehicle mark for road transportation dangerous goods GB/T 13609 Natural gas - Gas sampling GB/T 13610 Analysis of natural gas composition - Gas chromatography GB/T 17258 Steel cylinders for the on-board storage of compressed natural gas as a fuel for automotive vehicles GB/T 17283.1 Natural gas - Determination of moisture - Part 1 : Determination of water dew point by cooled surface condensation hygrometers GB/T 18619.1 Natural gas - Determination of water by the Karl Fischer method - Coulometric procedure GB/T 19158 Fully wrapped carbon-fibre reinforced aluminum lined gas cylinders used on containers or skids for transportation or skids for fueling station of compressed hydrogen GB 20300 Safety specifications for road transportation vehicle of explosive substance and chemical toxic substance GB/T 20604 Natural gas - Vocabulary GB/T 21069 Natural gas - Determination of water content at high pressure GB/T 22634 Conversion between water content and water dew point of natural gas GB/T 27894.1 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 1: General guidelines and calculation of composition GB/T 27894.2 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 2: General guidelines and calculation of composition GB/T 27894.3 Natural gas - Determination of composition and associated uncertainty by gas chromatography-Part 3: Precision and bias GB/T 27894.4 Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 4: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns GB/T 27894.5 Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 5: Determination of nitrogen, carbon dioxide and C1 to C5 and C+6 hydrocarbons for a laboratory and on-line process application using three columns GB/T 27894.6 Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 6: Determination of hydrogen helium oxygen nitrogen carbon dioxide and C1 to C8 hydrocarbons using three capillary columns GB/T 27896 Test method for water vapor content of natural gas - Electronic moisture analyzers GB/T 30490 The method for automatic sampling of natural gas GB/T 33440 General requirements for interchangeability of natural gas GB/T 35211 Measurement of nature gas calorific value - Continuous combustion GB/T 43503 Natural gas - Determination of oxygen - Electrochemical method GB 55009 Project code for gas engineering SY/T 6899 Natural gas - Determination of the water dew point - The capacitance method SY/T 7379 Natural gas -Determination of water vapor content-Tunable diode laser absorption spectroscopy (TDLAS) SY/T 7507 Determination of water in natural gas - Electrolytic method SY/T 7607 Rapid determination of hydrogen sulfide and tetra hydrothiophene in natural gas by gas chromatography method with micro TCD SY/T 7675 Natural gas - Determination of water and hydrocarbon dew point - Polarized light cooling mirror method SY/T 7704 Natural gas - Determination of calorific value - Visible spectrum ultrasonic correlation method SY/T 7853 Natural gas - Determination of calorific value, relative density and CO2 concentration -Laser-based method TSG 21 Supervision regulation on safety technology for stationary pressure vessel TSG 23 Regulation on safety technology for gas cylinder 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 20604 and the following apply. 3.1 compressed natural gas natural gas that has been treated and compressed for the purposes of storage and transport [Source: GB/T 20604-2025, 3.1.1.12] 3.2 compressed natural gas as vehicle fuel compressed natural gas stored in dedicated pressure vessels and used as vehicle fuel [Source: GB/T 20604-2025, 3.1.1.12] 3.3 methane number index for evaluating the knock resistance of a gaseous fuel Note: The methane number may be considered as corresponding to the octane number for petrol. The methane number is expressed as the volume percentage of methane in a methane‑hydrogen mixture which, in a test engine under standard conditions, has the same knock tendency as the gaseous fuel being tested. [Source: GB/T 20604-2025, 3.6.6.1] 4 Quality requirements

Contents Foreword I 1 Scope 2 Normative references 3 Terms and definitions 4 Quality requirements 5 Sampling 6 Test methods 7 Inspection and judgment rules 8 Storage, transport and application Annex A (Normative) Motor octane number – methane number calculation method (MON‑MN) Annex B (Normative) Propane Knock Index – Methane Number Calculation Method (PKI‑MN) Annex C (Informative) Safety information for compressed natural gas Bibliography