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GB/T 35077-2025: Safety of machinery - Local exhaust ventilation system - Safety requirements
Status: Valid GB/T 35077: Evolution and historical versions
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| GB/T 35077-2025 | English | 539 |
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Safety of machinery - Local exhaust ventilation system - Safety requirements
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GB/T 35077-2025
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| GB/T 35077-2018 | English | 339 |
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Safety of machinery -- Local exhaust ventilation system -- Safety requirements
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GB/T 35077-2018
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PDF similar to GB/T 35077-2025
Basic data | Standard ID | GB/T 35077-2025 (GB/T35077-2025) | | Description (Translated English) | Safety of machinery - Local exhaust ventilation system - Safety requirements | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J09 | | Classification of International Standard | 13.110 | | Word Count Estimation | 26,253 | | Date of Issue | 2025-05-30 | | Date of Implementation | 2025-09-01 | | Older Standard (superseded by this standard) | GB/T 35077-2018 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 35077-2025: Safety of machinery - Local exhaust ventilation system - Safety requirements---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 13.110
CCSJ09
National Standard of the People's Republic of China
Replaces GB/T 35077-2018
Safety of machinery - Safety requirements for local exhaust ventilation systems
Released on 2025-05-30
2025-09-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
Introduction V
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Basic Requirements 3
5 Structure and layout 3
5.1 System Structure 3
5.2 System Layout 4
5.3 Job Isolation 4
5.4 Individual settings 4
6 Exhaust hood 4
7 Pipes and exhaust pipes 5
7.1 Pipeline 5
7.2 Exhaust pipe 5
8 Air Purification Equipment 6
9 Fan 6
10 Make-up air system 8
11 Control System 8
12 Usage Information 9
Appendix A (Informative) Schematic diagram of local exhaust ventilation (LEV) system components 10
Appendix B (Informative) Design information for exhaust hoods 11
Appendix C (Normative) Requirements for the selection of flame arresters, breathing valves or emergency relief valves 12
Appendix D (Informative) Non-contact thermal particle detection 13
Appendix E (Informative) Examples of Safety Control Measures for Air Purification Equipment 14
Appendix F (Informative) Mechanism of action of inert dust 16
Reference 18
Foreword
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 35077-2018 "Safety requirements for local exhaust ventilation systems for machinery safety" and GB/T 35077-
Compared with.2018, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
--- Changed the scope of inapplicability of the document (see Chapter 1, Chapter 1 of the.2018 edition);
--- Change the terms "inlet coefficient", "air collection hood", "air collection flow" and "user" to "exhaust hood resistance coefficient", "exhaust hood", "exhaust
Airflow” and “user” (see 3.3, 3.7, 3.8 and 3.12, 3.6, 3.10, 3.11 and 3.21 of the.2018 edition); “average” was deleted
balance", "deflector", "branch", "capture velocity", "surface wind speed", "loss coefficient", "main pipe", "slot velocity", "system operating point
The terms and definitions of "System Operation Permit" and "System Efficiency Loss" (see 3.3, 3.4, 3.5, 3.8, 3.12, 3.14, 3.15,
3.18, 3.19, 3.20);
--- Changed the technical content of "Basic Requirements" (see Chapter 4, Chapter 4 of the.2018 edition);
--- Changed the technical content of "Structure and layout" (see Chapter 5, 5.1, 5.2, 5.3 of the.2018 edition);
--- Deleted the relevant provisions on factory building renovation in structure and layout (see 5.4 of the.2018 edition);
--- Changed the technical requirements for exhaust hoods (see 6.1, 6.2, 6.4, 6.5, 6.7, 7.1, 7.3, 7.4, 7.6, 7.8, 7.12 of the.2018 edition);
--- Deleted the requirements for the use and monitoring of exhaust hoods (see 7.5, 7.10, 7.11 of the.2018 edition);
--- Changed the technical requirements for pipes and exhaust pipes (see 7.1.2, 7.1.3, 7.1.4, 7.2.1, 7.2.2, 7.2.3, 7.2.4,.2018 edition
8.3, 8.4, 8.5, 8.8, 8.9, 8.10);
--- Added technical requirements for pipelines for transporting hot particles and requirements that pipelines should not be concealed (see 7.1.6, 7.1.8);
--- Added requirements for lightning protection of exhaust ports and metal mesh screens (see 7.2.5, 7.2.6);
--- Deleted the requirements for personnel and layout of pipeline design (see 8.1 and 8.7 of the.2018 edition);
--- Changed the technical requirements for air purification equipment (see 8.1, 8.2, 8.4, 9.1 and 9.2 of the.2018 edition);
--- Deleted the requirements for the use of purification equipment and waste treatment requirements (see 9.3 and 9.4 of the.2018 edition);
--- Added technical requirements for air purification equipment for treating combustible pollutants (see 8.3, 8.5, 8.6);
--- Changed the technical requirements for fans (see 9.1, 9.2, 9.3, 9.4, 9.5, 9.7, 9.8, 9.11, 9.12, 10.1, 10.2,.2018 edition
10.5, 10.6, 10.7, 10.8, 10.11);
--- Deleted the requirements for fan system operating points, operation and maintenance, and metal mesh screens (see 10.3, 10.4, and 10.9 of the.2018 edition);
--- Added requirements for fans that handle combustible pollutants and requirements for connections between fans and pipes (see 9.6, 9.9);
--- Changed the technical requirements for the make-up air system (see 10.1, 10.2, 10.4, 10.5, 10.6, 10.9, 10.10, 6.1,.2018 edition
6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 6.10);
--- Deleted the requirements for supplementary air for personnel comfort and the requirements for supplementary air as propulsion air (see the.2018 edition
6.11, 6.12, 6.13);
--- Added requirements for the location of the supplementary air inlet and the requirements for heating the supplementary air (see 10.3, 10.7, 10.8,
10.10);
--- Added relevant requirements for "control systems" (see Chapter 11);
--- Added relevant requirements for "information for use" (see Chapter 12);
--- Added the normative appendix "Requirements for the selection of flame arresters, breathing valves or emergency relief valves" (see Appendix C).
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 and coordinated by the National Technical Committee for Machinery Safety Standardization (SAC/TC208).
This document was drafted by. Dongguan Huile Technology Co., Ltd., Nanjing Preteg Safety Equipment Engineering Co., Ltd., Hangzhou Gujia Ship
Bo Technology Co., Ltd., China Machinery Research Institute of Standards and Technology (Beijing) Co., Ltd., Yalong Intelligent Equipment Group Co., Ltd., Lantu Auto
Technology Co., Ltd., Ningde New Energy Technology Co., Ltd., Zhejiang Wujing Machinery Manufacturing Co., Ltd., GAC Aion New Energy Automobile Co., Ltd.
Company, Zhejiang Longyuan Sifang Machinery Equipment Manufacturing Co., Ltd., Xinwanda Electronics Co., Ltd., Sichuan Shuxing Youchuang Safety Technology Co., Ltd.
Tesla (Shanghai) Co., Ltd., CRRC Dalian Locomotive and Rolling Stock Co., Ltd., Ningbo Weicheng Technology Co., Ltd., Nanjing University of Science and Technology,
Guangzhou Special Electromechanical Equipment Testing Institute, Lane Intelligent Alloy (Guangde) Co., Ltd., Pilz Electronics (Changzhou) Co., Ltd., China Railway Construction University
Bridge Engineering Bureau Group Electrification Engineering Co., Ltd., Aneng Chongqing Construction Development Co., Ltd., Guangdong Polytechnic Normal University, China Railway Construction Bridge Engineering
Bureau Group Building Assembly Technology Co., Ltd., China University of Metrology Modern Science and Technology College, Guangzhou West Daff Industrial Co., Ltd., Shaoxing Keqiao Jiang
Waterfront Treatment Co., Ltd., Qingdao Meide Shanghe Rubber & Plastic Technology Co., Ltd., Shenzhen Danse Visual Arts Co., Ltd., Guangqi Honda Automobile Co., Ltd.
Company, Wuxi Hongye Automation Engineering Co., Ltd., Chengdu Ruixue Fengtai Precision Electronics Co., Ltd., Xinjiang Dingfeiyi Intelligent Technology Co., Ltd.
Company, Shaanxi Baoyu Technology Industry Co., Ltd., Haining Aifuluo Electric Co., Ltd., Shaoxing Yuzhimeng Food Co., Ltd., Binzhou Municipal Procuratorate
Inspection and Testing Center, Lijun Machinery Equipment (Qihe) Co., Ltd., Shenzhen Bangzheng Precision Machinery Co., Ltd., Yiwu Jinglong Mould Co., Ltd.,
Jiangsu Liansheng New Technology Co., Ltd.
The main drafters of this document are. Wang Xinhua, Zhang Peng, Liang Jun, Lin Weibo, Han Ji, Ma Yuning, Zhang Yan, Chen Jiquan, Chen Chaoyang, Chang Yi, Wang Lidong,
Chen Hui, Chen Guoliang, Xiao Xiukun, Chen Yuansen, Qin Peijun, Liu Zhilong, Liu Guoxiang, Zhang Xiuzhuo, Liu Zhiyong, Huang Zhijiong, Lan Xu, Dai Wenjie, Gou Yujun,
Mi Hao, Cheng Yindai, Li Qin, Ren Ye, Zhang Wei, Wang Feng, Zhang Pengyue, Cheng Hongbing, Zhang Xiaofei, Wu Xianglin, Xu Xiaoming, Curie Kai, Zhang Yadong, Qian Yan,
Qu Gang, Zhang Pengkun, Zhang Jie, Hou Bin, Ou Xuefeng, Jiang Ping, Wang Wenbin, Gong Lihua, Zhu Weifeng, and Yang Senlin.
This document was first published in.2018 and this is the first revision.
Introduction
The structure of safety standards in the field of machinery is as follows.
--- Category A standards (basic safety standards) give basic concepts, design principles and general characteristics applicable to all machinery;
--- Class B standards (general safety standards) involve a safety feature in a machine or a type of safety device with a wider range of use.
● Category B1, safety features (such as safety distance, surface temperature, noise) standards;
● Category B2, safety device (such as two-hand control device, interlock device, pressure sensitive device, protective device) standard.
---C-type standards (machinery product safety standards) are standards that specify detailed safety requirements for a specific machine or a group of machines.
According to GB/T 15706, this document belongs to Class B1 standard.
This document is particularly relevant to the following stakeholders involved in machinery safety.
---Machine manufacturer;
---Health and safety agencies.
Other stakeholders affected by the level of machinery safety are.
---Machine users;
---Machine owner;
---Service providers;
--- Consumer (for machinery intended for use by consumers).
All of the above stakeholders may participate in the drafting of this document.
Furthermore, this document is intended for use by standardization bodies drafting Type C standards.
The requirements specified in this document may be supplemented or modified by Type C standards.
For machines within the scope of Class C standards and designed and manufactured in accordance with Class C standards, the requirements in Class C standards shall take precedence.
Local exhaust ventilation (LEV) is an important engineering control technique for maintaining acceptable air quality for personnel in industrial work environments.
Its main purpose is to control or contain airborne contaminants as close as possible to the point of their generation. Local exhaust ventilation is often used in conjunction with other control
Local exhaust ventilation, if properly designed, installed, and operated, should be used in conjunction with other measures, such as isolation, dilution ventilation, or personal protective equipment.
(LEV) is able to control airborne pollutants very well.
This document aims to improve working conditions in industrial enterprises, protect the health and safety of people in environments where pollutant emissions are present, and avoid or reduce
Fewer safety accidents.
Safety of machinery - Safety requirements for local exhaust ventilation systems
1 Scope
This document specifies the requirements for local exhaust ventilation (LEV) systems to prevent or avoid exposure of personnel to airborne contaminants in industrial environments.
Basic safety requirements.
This document applies to the design, installation, operation and maintenance of fixed industrial local exhaust ventilation (LEV) systems, mobile exhaust ventilation
The system can also be used for reference.
This document does not apply to local exhaust ventilation (LEV) systems used for.
---Comfortable ventilation;
--- Transporting air as part of an industrial process;
---Not for the primary purpose of protecting personnel;
---Save energy;
---Handling of radioactive materials;
---Special purpose, special purification and special protection requirements.
2 Normative references
The contents of the following documents constitute 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 15706-2012 General principles for safety design of machinery - Risk assessment and risk reduction
GB/T 16758-2008 Classification and technical requirements of exhaust hoods
GB/T 16855.1 Safety of machinery - Safety-related components of control systems - Part 1.General principles for design
GB/T 23819 Machinery Safety Fire Prevention and Protection
GB/T 25749 (all parts) Safety of machinery - Assessment of emissions of airborne hazardous substances
GB/T 33579 Safety of machinery - Hazardous energy control methods - Lockout/tagout
GB/T 38367 Risk assessment of ignition hazards for safety of machinery
GB/T 42598 General rules for drafting safety instructions for machinery
GB 50016-2014 Code for fire protection design of buildings
GB 50019-2015 Design specification for heating, ventilation and air conditioning of industrial buildings
GB 50057 Code for Lightning Protection Design of Buildings
GB 50058 Design specification for electrical installations in explosive atmospheres
GB 55037-2022 General code for fire protection of buildings
3 Terms and definitions
The terms and definitions defined in GB/T 15706-2012 and the following apply to this document.
3.1
Exhaust systemexhaustsystem
A mechanical system that removes airborne contaminants from a space and consists of one or more of the following components or systems.
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