GB 17919-2025Safety specification for explosion protection in combustible dust collection system (English PDF)

1 Scope

GB 17919-2025 is the Chinese national standard on safety specification for explosion protection in combustible dust collection system, in the field of environment and health protection, safety. It carries no /T suffix, which in the Chinese system means compliance is mandatory: a product or a practice within its scope has to meet it to be lawfully made, sold or carried out in China. It was issued on 31 October 2025 by the State Administration for Market Regulation; Standardization Administration of China, and takes effect on 1 November 2026. Classification: ICS 13.230, CCS C67. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This Document specifies the general requirements, process system and equipment requirements, explosion control measures requirements, monitoring and early warning requirements, and operational safety management requirements for dust collection systems used in the area subject to dust explosion hazardous; and describes the corresponding verification methods. This Document applies to the design, manufacture, installation, acceptance, use, and maintenance of dust collection systems used in area subject to dust explosion hazardous. This Document does not apply to dusty areas in coal mines, of fireworks and firecrackers, explosives, or strong oxidizers.

2 Normative References

The provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document.

GB 2894 Safety colors and safety signs

GB 3836.15 Explosive atmospheres - Part

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 In an atmospheric environment, tiny solid particles that can either settle down by their own weight or remain suspended in the air for a period of time.

3.2 Combustible dust In an atmospheric environment, dust, fibers, or fluffy catkins that can undergo violent oxidation reactions with gaseous oxidants. NOTE. The gaseous oxidant, primarily air, and combustible dust can cause dust explosions under certain conditions.

3.3 Area subject to dust explosion hazardous Locations where there is a risk of flammable dust explosion in the atmospheric environment.

3.4 Dust collection system A system for capturing solid particles in a gas-solid two-phase flow, consisting of a dust hood, ductwork, dust collector, fan, and control device.

3.5 Dust collector Devices or equipment for separating and capturing dust from dusty gases.

3.6 Dry dust collector A dust collector that does not use liquids (water) to capture dust in dusty gases.

3.7 Wet dust collector/wet scrubber A dust collector that uses the washing action of a liquid to separate dust from dusty gases. NOTE. The liquid in a wet scrubber is generally water.

3.8 Gravity dust collector A dust collector that separates and captures dust from dusty gases without using liquid (water), separating the dust from the dusty gases while simultaneously capturing and collecting the dust. It combines a dust collection hood, dust removal duct, dust collector, fan, and control device.

3.18 Honeycomb dust collector A dust collector that is used to collect fibers in textile processes. NOTE. The filter media in the main body of the honeycomb dust collector is disc-shaped, and the filter media is cleaned by a rotating suction arm located in the dusty air chamber.

3.19 Explosion-proof device The Device that employs dust explosion prevention and control technologies to avoid the formation of dust clouds or potential ignition sources, thereby reducing the hazards of explosions. NOTE. Such as explosion venting, inerting, explosion isolation, and explosion suppression devices, etc.

4 General Requirements

4.1 Dust collection systems should be designed and selected based on dust explosion risk assessment, production processes, environmental protection, and occupational health requirements.

4.2 Dust collection systems shall be set up relatively independently for different process areas (zones). A single dust collection system shall not be shared in any of the following situations.

a) Different types of dust that may exacerbate the explosion hazard after mixing;

b) Combustible dust and combustible gases (including vapors);

c) Dust-generating points within two or more independent buildings (structures);

d) Dust-generating points in different fire compartments of the same building (structure);

e) Process dust collection systems and environmental cleaning systems.

4.3 The grinding room, powder screening room, and shot blasting room of metal powder additive manufacturing (3D printing) shall be set up with relatively independent dust collection systems for different process areas (zones).

4.4 When combustible dust and combustible gas coexist or are associated, measures shall be taken simultaneously to prevent explosions of both the combustible gas and combustible dust.

4.5 Dust collection systems in different buildings (structures) or different fire compartments shall not be connected through dust collection pipes, exhaust ducts, or fans.

4.6 Combustible dust shall not share an exhaust chimney with combustible or corrosive waste gases; combustible metal dust collection systems shall not share an exhaust chimney with the fan terminals of other dust collection systems.

4.7 Electrostatic precipitators and gravity dust collectors shall not be used in dust collection systems.

4.8 Inside filtration shall not be used in filter-type dry dust collection systems.

4.9 Dry dust collection systems shall employ one or more explosion control measures, including explosion venting, explosion isolation, explosion suppression, explosion resistance, and inerting; but explosion isolation measures shall not be used alone.

15 Specification of electrical installations design, selection and erection

GB 7231 Basic identification colors and code indications and safety sign for industrial pipelines

GB 12158 General requirements for preventing electrostatic accidents

GB 15577 Safety regulations for dust explosion prevention and protection

GB/T 15604 Terminology for dust explosion prevention

GB 15605 Specifications for pressure venting of dust explosion

GB/T 24626 Explosion resistant equipment

GB 50057 Design Code for Lightning Protection of Buildings

GB 50058 Code for Design of Electrical Installations in Explosive Atmospheres