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ICS 13.230
CCS C 67
National Standard of the People’s Republic of China
GB 32276-2025
Replaces GB 19881-2005, GB 32275-2015, GB 32276-2015
Safety specification for dust explosion protection in textile industry
纺织工业粉尘防爆安全规范
Issue date: 2025-10-31 Implementation date: 2026-05-01
Issued by the State Administration for Market Regulation of the People's Republic of China
the Standardization Administration of the People's Republic of China
Safety specification for dust explosion protection in textile industry
1 Scope
This document specifies the classification and scope of dust explosion hazardous areas in the textile industry, general requirements for dust explosion prevention and protection, requirements for buildings and structures, ventilation systems, dust collection systems, explosion control measures, electrical equipment, and operational safety management. It also describes the corresponding verification methods.
This document applies to the design, operation, and safety management of dust explosion hazardous areas and dust collection systems in the textile industry using cotton, hemp, wool, blended fibers, chemical fibers, silk, etc., as raw materials.
2 Normative References
The contents of the following documents constitute essential provisions of this document through normative reference in the text. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 3836.1 Explosive atmospheres - Part 1: Equipment - General requirements
GB 3836.15 Explosive atmospheres - Part 15: Design, selection and erection of electrical installations
GB 3836.16 Explosive atmospheres - Part 16: Inspection and maintenance of electrical installations
GB 12158 General guidance for preventing electrostatic accidents
GB 15577 Safety regulations for dust explosion prevention and protection
GB/T 15604 Terminology of dust explosion prevention and protection
GB 50016 Code for fire protection design of buildings
GB 50057 Design code for protection of structures against lightning
GB 50058 Code for design of electrical installations in explosive atmospheres
GB 50565 Code for fire protection design of textile engineering
GB 55037 General code for fire protection in buildings
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 15604 and the following apply.
3.1
dust collection room
a building or structure housing dust removal equipment and associated fans.
Note: Includes the enclosed pressure-bearing shell of cellular-type dust removal equipment.
3.2
dust collection system
a system consisting of hoods, ducts, dust removal equipment, fans, and control devices used to capture solid particulates from a gas-solid two-phase flow.
Note: In textile processes, mobile vacuum cleaners and pneumatic conveying systems are not considered dust collection systems.
3.3
dust removal equipment
equipment used to separate and capture dust from dust-laden air.
Note: Includes pre-filtration equipment, fine filtration equipment, dust collectors, and compactors.
3.4
pre-filtration
the process of (initially) separating and capturing large dust particles and fibers from the air.
3.5
fine filtration
The process of separating and capturing fine dust particles from the air.
3.6
dust collector
equipment used to collect dust from filter media.
3.7
compactor
equipment that compacts the dust collected in the dust collector into a dense mass.
3.8
mobile vacuum cleaner
a movable dust suction device with a dust storage capacity of less than 15 liters, used in processes such as roving and spinning to collect dust and fibers from the air (or settled on the floor) in the workshop.
3.9
dust removal pipeline
piping used to convey the airflow containing dust and fibers discharged from textile production equipment.
3.10
return air trench
an underground channel connecting the workshop air return inlets with the air conditioning system's return air chamber.
3.11
opening and cleaning
the process in the initial stage of spinning used to loosen and blend fibrous raw materials and remove impurities and foreign fibers.
4 Classification and Scope of Dust Explosion Hazardous Areas in the Textile Industry
4.1 The classification and scope of textile dust explosion hazardous areas shall be determined based on factors such as the process, material characteristics, location of textile dust release sources, the quantity and likelihood of dust release, explosion conditions, ventilation and dust removal, and the structure and layout of the area.
4.2 When changes occur in raw materials, processes, equipment, area structure and layout, or work organization methods in textile processing, the scope and classification level of the dust explosion hazardous area shall be re-evaluated, defined, and classified.
4.3 Documentation defining the zoning classification and its rationale shall be maintained throughout the lifecycle of the operation, and the process hazards and zoning shall be dynamically assessed periodically.
4.4 When changes occur in the classification or scope of textile dust explosion hazardous areas, technical and managerial measures shall be promptly implemented to ensure that equipment and facilities within the changed area meet the requirements for dust explosion prevention and protection.
4.5 Process workshops such as garment manufacturing, printing and dyeing, and nonwovens shall be classified as non-dust explosion hazardous areas. However, the dust collection systems for processes such as raising, brushing, tumble drying, milling, shearing, carding, sanding, and beating shall be classified as dust explosion hazardous areas.
Contents
Foreword III
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Scope of Dust Explosion Hazardous Areas in the Textile Industry
5 General Requirements
6 Requirements for Buildings and Structures
7 Requirements for Ventilation Systems
8 Requirements for Dust Collection System
9 Requirements for Explosion Control Measures
10 Electrical Requirements
11 Operational Safety Management Requirements
12 Verification Methods
Appendix A (Informative) Fundamental Data on Textile Fiber Dust Explosions
