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GB/T 23335-2025Natural gas vehicles - Engineering approval evaluation programme (English PDF)

天然气汽车定型试验规程

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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 23335-2025 is the English-translated version of 天然气汽车定型试验规程.

GB/T 23335-2025 is the Chinese standard "Natural gas vehicles - Engineering approval evaluation programme". Its scope clause reads: This document specifies the requirements, test items and methods, and test report content for the type approval test of natural gas vehicles.

This document applies to the installation of vehicle natural gas systems or the conversion of existing natural gas fuel systems in newly developed basic natural gas vehicles and existing model vehicles. Natural gas vehicles powered by natural gas engines.

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Document preview — GB/T 23335-2025

National Standard of the People's Republic of China

ICS: 43.020
Classification: T 40
Replacing: GB/T 23335-2009

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Test conditions and conditions for terminating the test
5.Test Items and Methods
6.Compliance determination
7 Test Report

1 Scope

This document specifies the requirements, test items and methods, and test report content for the type approval test of natural gas vehicles.

Natural gas vehicles powered by natural gas engines.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB 1495 Limits and Measurement Methods for Exterior Noise of Automobiles During Acceleration

GB 1589 Limits for the overall dimensions, axle load and mass of automobiles, trailers and automobile combinations

GB 3847 Emission Limits and Measurement Methods for Pollutants from Diesel Vehicles (Free Acceleration Method and Loaded Deceleration Method)

GB/T 6323 Test Method for Handling Stability of Automobiles

GB 7258 Technical Conditions for Safe Operation of Motor Vehicles

GB/T 12534 General Rules for Road Test Methods of Automobiles

GB/T 12535 Test Method for Starting Performance of Automobiles

GB/T 12536 Test Method for Coasting of Automobiles

GB/T 12538 Determination of the position of the center of gravity of road vehicles

GB/T 12539 Test Method for Automobile Climbing Steep Hills

GB/T 12540 Methods for measuring minimum turning diameter, turning circle and overrun of automobiles and automobile trains

GB/T 12543 Test Methods for Acceleration Performance of Automobiles

GB/T 12544 Test Method for Maximum Vehicle Speed

GB/T 12547 Test Method for Minimum Stable Vehicle Speed

GB/T 12548 Test and Calibration Methods for Automobile Speedometers and Odometers

GB/T 12673 Methods for Measuring Main Dimensions of Automobiles

GB/T 12674 Methods for measuring mass parameters of automobiles, trailers and automobile combinations

GB/T 12677 Methods for Inspecting the Technical Condition of Automobiles While Driving

GB/T 12678 Test Methods for Vehicle Reliability in Road Conditions

GB 17691 Emission Limits and Measurement Methods for Pollutants from Heavy-Duty Diesel Vehicles (China VI Stage)

GB/T 17895 Vocabulary for Natural Gas Vehicles and Liquefied Petroleum Gas Vehicles

GB 18047 Compressed Natural Gas for Vehicles

GB 18285 Emission limits and measurement methods for pollutants from gasoline vehicles (dual idle speed method and simplified operating condition method)

GB 18352.6 Limits and Measurement Methods for Pollutant Emissions from Light-Duty Vehicles (China Stage VI)

GB/T 18697 Acoustic Measurement Method for Vehicle Interior Noise

GB/T 19204 General characteristics of liquefied natural gas

GB 19239 Installation Specification for Gas Systems of Gas-Powered Vehicles

GB/T 20735 | GB 19578 | GB 20997 | GB/T 40711.3 | GB/T 47341 | […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

QC/T 691-2011Technical specifications for mono-fuel natural gas vehicle engines

Editions of GB/T 23335

Edition	Title	Revision	Status
GB/T 23335-2025	Natural gas vehicles engineering approval evaluation program	current edition	Current
GB/T 23335-2009	Natural gas vehicles -- Engineering approval evaluation program	previous edition	In force

This page sells the current edition, GB/T 23335-2025. Earlier editions are listed for reference only.

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