GB/T 35077-2025Safety of machinery — Local exhaust ventilation system — Safety requirements (English PDF)

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.

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

GB/T 15706-2012

GB/T 16758-2008

GB/T 16855.1

GB/T 23819

GB/T 25749

GB/T 33579

GB/T 38367

GB/T 42598

GB 50016-2014

GB 50019-2015

GB 50057

GB 50058

GB 55037-2022

3 Terms and definitions

The terms and definitions defined in GB/T 15706-2012 and the following apply to this document.