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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 17919-2025 | English | 305 |
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Safety specification for explosion protection in combustible dust collection system
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| GB/T 17919-2008 | English | 70 |
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Directives for dust explosion protection for dust collectors in dust explosion hazardous area
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| GB/T 17919-1999 | English | 239 |
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Directives for dust explosion protection for dust collectors in dust explosion hadardous ares
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GB 17919-2025: Safety specification for explosion protection in combustible dust collection system
---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/GB17919-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.230
CCS C 67
Replacing GB/T 17919-2008
Safety Specification for Explosion Protection in Combustible
Dust Collection System
Issued on: OCTOBER 31, 2025
Implemented on: NOVEMBER 1, 2026
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 6
4 General Requirements... 8
5 Process System and Equipment Requirements... 10
5.1 Dry dust collector... 10
5.2 Wet dust collector... 13
5.3 Wet dust removal integrated equipment... 13
5.4 Dust collection hood... 14
5.5 Dust collection duct... 14
5.6 Dust collection fan... 15
5.7 Dust bin... 15
6 Requirements for Explosion Control Measures... 15
6.1 Explosion venting... 15
6.2 Explosion isolation... 16
6.3 Explosion suppression... 16
6.4 Explosion resistance... 17
6.5 Inerting... 17
7 Requirements for Monitoring and Early Warning... 18
8 Requirements for Operational Safety Management... 19
8.1 Dust cleaning... 19
8.2 Maintenance and repair... 20
9 Verification Methods... 21
Safety Specification for Explosion Protection in Combustible
Dust Collection System
1 Scope
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 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
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.
4.10 When a dry dust collection system is connected to process equipment that is prone to
generating high temperatures, sparks, or other ignition sources, measures shall be taken to
prevent ignition sources in the air inlet duct of the dust collection system.
4.11 When handling niobium, tantalum, titanium, zirconium, and hafnium dust, dry dust
collection methods shall not be used without inerting protection measures.
4.12 Dry dust collectors used for additive manufacturing (3D printing) of metal powders such
as aluminum, magnesium, and titanium shall employ atmosphere inerting measures.
4.13 Combustible metal dust collection systems shall use negative pressure dust collection
methods. When other combustible dust collection systems are limited by process conditions to
use positive pressure blowing methods, measures shall be taken to prevent ignition sources.
4.14 When a multi-stage dust collector is connected in series in a dust collection system for
combustible metal dust, no dust collection fans shall be installed between the dust collectors;
when a multi-stage dust collector is connected in series in a dust collection system for other
combustible dust, if dust collection fans are installed between the dust collectors, measures
shall be taken to prevent ignition sources.
4.15 Dust collectors and their pipelines located outside buildings shall be protected against
water mist and rainwater infiltration.
4.16 The electrical design, selection, and installation of dust collection systems shall meet the
relevant requirements of GB 50058 and GB 3836.15.
4.17 Metal pipelines, supports, components, dust collector bodies, and dust collection
containers (buckets) made of metal materials in dust collection systems shall be equipped with
anti-static grounding measures.
4.18 Anti-static bridging shall be applied to areas where static electricity may discontinuity
occurs, such as flange connections of metal pipelines, both ends of flexible connections, and
both ends of valves. Static electricity protection measures shall meet the relevant requirements
of GB 12158.
4.19 Lightning protection measures for dust collection systems shall meet the relevant
requirements of GB 50057.
4.20 Safety signs for dust collection systems shall meet the relevant requirements of GB 2894.
4.21 Before entering area subject to dust explosion hazardous, fuel-powered vehicles shall be
equipped with exhaust spark extinguishing devices.
5 Process System and Equipment Requirements
5.1 Dry dust collector
5.1.1 Dust collector housing
5.1.1.1 It shall be made of steel; and the design strength of the housing shall be able to withstand
the maximum explosion pressure after explosion-proof measures are taken.
5.1.1.2 The interior surface of the dust collector shall be smooth and rust-proofed; aluminum
coating shall not be used.
5.1.1.3 Internal measures such as flow guidance or arcing shall be taken to prevent dust
accumulation. The angle between the ash hopper wall and the horizontal plane shall be greater
than 65°.
5.1.1.4 An inspection door shall be provided. The design strength of the inspection door and its
connections shall be no less than the design strength of the dust collector housing.
5.1.1.5 Fire extinguishing device interfaces shall be provided according to the physicochemical
properties of the dust.
5.1.2 Filter media
5.1.2.1 Flame-retardant and anti-static filter media shall be used.
5.1.2.2 The electrostatic protection measures for metal components connecting the filter media
(such as filter media frames, tube sheets, short pipes, etc.) shall meet the relevant requirements
of GB 12158.
5.1.3 Dust cleaning
5.1.3.1 Filter media in porous layer dust collectors shall not be cleaned by mechanical or manual
shaking.
5.1.3.2 The air source of dust cleaning for porous layer dust collectors shall use purified gas
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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