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GB/T 23334-2025: Open-type roof escape hatch on bus
Status: Valid GB/T 23334: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 23334-2025 | English | 359 |
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Open-type roof escape hatch on bus
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GB/T 23334-2025
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| GB/T 23334-2009 | English | 189 |
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Open-type roof escape hatch on bus
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GB/T 23334-2009
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Basic data | Standard ID | GB/T 23334-2025 (GB/T23334-2025) | | Description (Translated English) | Open-type roof escape hatch on bus | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | T42 | | Classification of International Standard | 43.080.20 | | Word Count Estimation | 18,120 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 23334-2009 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 23334-2025: Open-type roof escape hatch on bus---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT23334-2025
ICS 43.080.20
CCST42
National Standard of the People's Republic of China
Replaces GB/T 23334-2009
Openable bus safety roof window
Released on August 29, 2025
Implementation on March 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 Product classification and model number 2
5 Technical Requirements 3
6 Test methods 6
7 Inspection Rules 9
8 Packaging and Storage 10
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 23334-2009 "Openable Passenger Vehicle Safety Top Window". Compared with GB/T 23334-2009, except for the structural adjustment
Besides the editorial changes, the main technical changes are as follows.
a) The definition of openable passenger car safety roof window has been changed (see 3.1, 3.1 of the.2009 edition);
b) Added a schematic diagram of the main components of the safety roof window (see Figure 1);
c) The movement mode of the safety top window has been deleted (see 5.4 of the.2009 edition);
d) Added the requirement that safety top windows should have operating devices (see 5.1.2);
e) The emergency exit sign requirements have been modified (see 5.1.3, 5.5 of the.2009 edition);
f) The standards for the opening dimensions of safety roof windows have been changed (see 5.1.4, 5.6 of the.2009 edition);
g) Changed the ambient temperature requirements for safety roof windows (see 5.2.1, 5.3 of the.2009 edition);
h) Changed the opening time and operating force requirements for emergency exits of safety roof windows (see 5.2.2, 5.9 of the.2009 edition);
i) Changed the performance requirements for safety skylight motors (see 5.2.3, 5.11 of the.2009 edition);
j) Changed the electromagnetic disturbance performance requirements for safety roof windows (see 5.2.9 and 5.18 of the.2009 edition);
k) Changed the combustion characteristics requirements for non-metallic materials of safety roof windows (see 5.2.10, 5.10 of the.2009 edition);
l) Changed the standards for contact resistance and insertion force of low-voltage connectors for safety roof windows with ventilation fans (see 5.2.12,.2009)
Version 5.19);
m) Added requirements for ventilation fan integrated purification devices (see 5.2.13);
n) Changed the ambient temperature requirements for the working environment adaptability test (see 6.1, 6.1 of the.2009 edition);
o) The test method for the opening time and operating force of the emergency exit of the safety roof window has been changed (see 6.2, 6.2 of the.2009 edition);
p) Added motor performance test method (see 6.3);
q) Added electromagnetic disturbance characteristics test method (see 6.9);
r) Added the standard for the combustion characteristics of non-metallic materials of safety roof windows (see 6.10);
s) Added low-voltage wiring harness test method (see 6.12);
t) Added the test method for ventilation fan integrated purification device (see 6.13);
u) Added inspection items (see 7.3).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee for Automotive Standardization (SAC/TC114).
This document was drafted by. Yutong Bus Co., Ltd., Xiamen King Long Motor Co., Ltd., China Highway Vehicle Machinery Co., Ltd.,
Xiangyang Daan Automobile Testing Center Co., Ltd., Danyang Vehicle and Ship Decoration Co., Ltd., China Automotive Engineering Research Institute Co., Ltd.,
Commercial Bureau Vehicle Testing Technology Research Institute Co., Ltd., Zhongtong Bus Co., Ltd., Shanghai Motor Vehicle Testing and Certification Technology Research Center Co., Ltd.
Company, Jiangsu Defulai Auto Parts Co., Ltd.
The main drafters of this document are. Li He, Lai Zhiyi, Yu Yali, Liao Mengnan, Shi Jianbai, Zhang Lei, Liu Zhaoxin, Xu Yi, Qiu Xuerui, Wang Xuan,
Xu Jianghua.
This document was first published in.2009 and this is the first revision.
Openable bus safety roof window
1 Scope
This document specifies the product classification and model designation, technical requirements, test methods, inspection rules, packaging and
store.
This document applies to the design, manufacture and inspection of opening passenger bus safety roof windows for M2 and M3 category passenger buses.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 191 Pictorial markings for packaging, storage and transportation
GB/T 2423.10 Environmental testing Part 2.Test methods Test Fc. Vibration (sinusoidal)
GB/T 2423.17 Environmental testing Part 2.Test methods Test Ka. Salt spray
GB/T 2423.22 Environmental testing Part 2.Test method Test N. Temperature change
GB/T 2423.34 Environmental testing Part 2.Test methods Test Z/AD. Temperature/humidity combined cycle test
GB/T 4214.1 General requirements for noise test methods for household and similar electrical appliances
GB 13094 Structural safety requirements for passenger cars
GB/T 15089 Classification of motor vehicles and trailers
GB/T 18655-2025 Radio disturbance characteristics of vehicles, ships and internal combustion engines - Limits and measurements for the protection of on-board receivers
method
GB/T 19951-2019 Test method for immunity of electrical and electronic components of road vehicles to electrostatic discharge
GB/T 21437.2-2021 Road vehicles - Test methods for electrical disturbances caused by conduction and coupling on electrical/electronic components - Part 2
Points. Electrical transient conducted emissions and immunity along power lines
GB/T 21437.3-2021 Road vehicles - Test methods for electrical disturbances caused by conduction and coupling on electrical/electronic components - Part 3
. Immunity to transients coupled to non-power lines
GB 30678 Safety signs and information symbols for passenger vehicles
GB/T 33014.2-2016 Test methods for immunity of electrical and electronic components of road vehicles to narrowband radiated electromagnetic energy Part 2
Points. Anechoic chamber method
GB/T 33014.4-2016 Road vehicles - Test methods for immunity of electrical and electronic components to narrowband radiated electromagnetic energy - Part 4
Points.Bulk Current Injection (BCI) method
GB 38262 Combustion characteristics of passenger car interior materials
JT/T 305-2023 Electric ventilation fans for passenger cars
QC/T 413-2002 Basic Technical Requirements for Automotive Electrical Equipment
QC/T 476 Passenger car rainproof sealing limit and test method
QC/T 484 Automobile Paint Coating
QC/T 625 Coatings and chemical treatment layers for automobiles
QC/T 639 Rubber sealing strips for automobiles
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