GB 17750-2025 Safety specification for dipping coating English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS H
National Standard of the People's Republic of China
GB 17750-2025
Safety specification for dipping coating
浸漆涂装安全规范
Issue date: 2025-12-31 Implementation date: 2027-01-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Dipping Equipment
6 Electrical and Automatic Control
7 Ventilation Systems and Exhaust Gas Treatment
8 Paint Storage and Conveyance
9 Operation and Maintenance
10 Verification Methods
Annex A (Normative) Division of Hazardous Areas for Explosive Gas Atmospheres in Dipping Areas
Bibliography
Safety Code for Dipping Coating
1 Scope
This document specifies the general requirements for safe production in dipping coating, including safety technical requirements for dipping equipment, electrical and automatic control, ventilation systems and exhaust gas treatment, paint storage and conveyance, operation and maintenance, etc. It also describes verification methods.
This document applies to dipping coating processes using flammable or combustible liquid paints, and the design, manufacture, installation, acceptance, and use of related equipment.
This document does not apply to electrophoretic painting using liquid paints.
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 5083 General Rules for Safety and Health Design of Production Equipment
GB 6514 Safety Code for Painting — Safety of Painting Process and Its Ventilation
GB 11341 Safety Code for Overhead Conveyors
GB 12158 General Guidance for Preventing Electrostatic Accidents
GB/T 14441 Safety Terminology for Painting Operations
GB 14443 Safety Technical Requirements for Coating Drying Ovens
GB 16297 Comprehensive Emission Standard of Air Pollutants
GB 20101 Safety Technical Requirements for Purification Equipment of Organic Exhaust Gas from Painting
GB 37822 Standard for Fugitive Emission Control of Volatile Organic Compounds
GB 39800.1 Specifications for the Provision of Personal Protective Equipment — Part 1: General
GB 50016 Code for Fire Protection Design of Buildings
GB 50019 Design Code for Heating, Ventilation and Air Conditioning of Industrial Buildings
GB 50058 Code for Design of Electrical Installations in Explosive Atmospheres
GB 50140 Code for Design of Extinguisher Distribution in Buildings
GB 55037 General Code for Building Fire Protection
GBZ 2.1 Occupational Exposure Limits for Hazardous Agents in the Workplace — Part 1: Chemical Hazardous Agents
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 14441 and the following apply.
3.1
dipping coating
dipping
A process in which a workpiece is immersed in paint, then withdrawn after the surface is coated, and excess paint is removed.
3.2
dip tank
A tank containing paint that can be used for dipping workpieces and has safety protection functions.
3.3
vacuum dipping
A process in which a workpiece is placed in a sealed, pressure-resistant, vacuum-pumped container, paint is injected and pressurized to thoroughly impregnate the workpiece.
3.4
electromagnetic wire dipping
A process in which an electromagnetic wire is immersed in insulating varnish to allow the varnish to fully penetrate the wire surface, forming a complete insulating coating.
3.5
dipping area
The painting area where dipping operations are performed.
3.6
dipping vapor source
Any source within 0.3 m of the exposed area where paint liquid and dipped workpieces are draining, where the concentration of paint vapor exceeds 25% of its lower explosion limit (LEL).
4 General Requirements
4.1 The dipping area shall include:
a) Areas containing dipping vapor sources, such as dipping booths, dip tanks, vacuum dipping equipment, electromagnetic wire dipping equipment, and ancillary equipment;
b) The interiors of dipping equipment and their connected ventilation systems;
c) Enclosed internal spaces within a dipping production line.
4.2 Passages, entrances, and exits within the dipping area shall be unobstructed and comply with the provisions of GB 50016.
4.3 A ventilation system shall be provided in the dipping area. Ventilation shall comply with the provisions of GB 6514 and GB 50019. The concentration of flammable gases in the dipping area shall not exceed 25% of their lower explosion limit (LEL).
4.4 Dipping booths shall comply with the following provisions:
a) When dipping operators are working, the concentration of chemical hazardous agents in the workplace air shall comply with the provisions of GBZ 2.1;
b) Dipping booths shall be equipped with independent ventilation systems;
c) Continuously operating dipping booths shall be equipped with combustible gas detection and alarm systems, fire alarm systems, and automatic fire extinguishing systems;
d) The alarm setpoint of combustible gas detectors shall not exceed 25% of the lower explosion limit (LEL) of the monitored combustible gas.
4.5 Lighting fixtures inside dipping booths shall be of explosion-proof or sealed explosion-proof lamp types; glass windows and observation windows on the booth structure shall be made of safety glass.
4.6 Open-top dip tanks with a volume ≤ 0.6 m³ or a liquid surface area ≤ 1 m² shall be equipped with non-combustible cover plates and dedicated fire extinguishing devices. Dip tanks with a volume > 0.6 m³ or a liquid surface area > 1 m² shall be equipped with dedicated or automatic fire extinguishing devices.
4.7 Prominent safety signs shall be posted in the dipping equipment area. Safety signs shall comply with the provisions of GB 5083 and GB 55037.
5 Dipping Equipment
5.1 Dip Tanks
5.1.1 The tank body shall be constructed of steel, reinforced concrete, or other non-combustible materials. For tanks with a volume exceeding 2 m³ or a liquid surface area exceeding 1 m², the fire resistance rating of the structural materials shall be not less than 1 hour.
5.1.2 Dip tanks placed underground shall have anti-leakage measures, and the tank opening shall be at least 150 mm above ground level. For dip tanks placed on the ground, when the distance between the tank opening and the ground floor or operating platform is less than 1050 mm, safety guardrails shall be installed around the tank opening.
Standard
GB 17750-2025 Safety specification for dipping coating (English Version)
GB 17750-2025 Safety specification for dipping coating English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS H
National Standard of the People's Republic of China
GB 17750-2025
Safety specification for dipping coating
浸漆涂装安全规范
Issue date: 2025-12-31 Implementation date: 2027-01-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Dipping Equipment
6 Electrical and Automatic Control
7 Ventilation Systems and Exhaust Gas Treatment
8 Paint Storage and Conveyance
9 Operation and Maintenance
10 Verification Methods
Annex A (Normative) Division of Hazardous Areas for Explosive Gas Atmospheres in Dipping Areas
Bibliography
Safety Code for Dipping Coating
1 Scope
This document specifies the general requirements for safe production in dipping coating, including safety technical requirements for dipping equipment, electrical and automatic control, ventilation systems and exhaust gas treatment, paint storage and conveyance, operation and maintenance, etc. It also describes verification methods.
This document applies to dipping coating processes using flammable or combustible liquid paints, and the design, manufacture, installation, acceptance, and use of related equipment.
This document does not apply to electrophoretic painting using liquid paints.
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB 5083 General Rules for Safety and Health Design of Production Equipment
GB 6514 Safety Code for Painting — Safety of Painting Process and Its Ventilation
GB 11341 Safety Code for Overhead Conveyors
GB 12158 General Guidance for Preventing Electrostatic Accidents
GB/T 14441 Safety Terminology for Painting Operations
GB 14443 Safety Technical Requirements for Coating Drying Ovens
GB 16297 Comprehensive Emission Standard of Air Pollutants
GB 20101 Safety Technical Requirements for Purification Equipment of Organic Exhaust Gas from Painting
GB 37822 Standard for Fugitive Emission Control of Volatile Organic Compounds
GB 39800.1 Specifications for the Provision of Personal Protective Equipment — Part 1: General
GB 50016 Code for Fire Protection Design of Buildings
GB 50019 Design Code for Heating, Ventilation and Air Conditioning of Industrial Buildings
GB 50058 Code for Design of Electrical Installations in Explosive Atmospheres
GB 50140 Code for Design of Extinguisher Distribution in Buildings
GB 55037 General Code for Building Fire Protection
GBZ 2.1 Occupational Exposure Limits for Hazardous Agents in the Workplace — Part 1: Chemical Hazardous Agents
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 14441 and the following apply.
3.1
dipping coating
dipping
A process in which a workpiece is immersed in paint, then withdrawn after the surface is coated, and excess paint is removed.
3.2
dip tank
A tank containing paint that can be used for dipping workpieces and has safety protection functions.
3.3
vacuum dipping
A process in which a workpiece is placed in a sealed, pressure-resistant, vacuum-pumped container, paint is injected and pressurized to thoroughly impregnate the workpiece.
3.4
electromagnetic wire dipping
A process in which an electromagnetic wire is immersed in insulating varnish to allow the varnish to fully penetrate the wire surface, forming a complete insulating coating.
3.5
dipping area
The painting area where dipping operations are performed.
3.6
dipping vapor source
Any source within 0.3 m of the exposed area where paint liquid and dipped workpieces are draining, where the concentration of paint vapor exceeds 25% of its lower explosion limit (LEL).
4 General Requirements
4.1 The dipping area shall include:
a) Areas containing dipping vapor sources, such as dipping booths, dip tanks, vacuum dipping equipment, electromagnetic wire dipping equipment, and ancillary equipment;
b) The interiors of dipping equipment and their connected ventilation systems;
c) Enclosed internal spaces within a dipping production line.
4.2 Passages, entrances, and exits within the dipping area shall be unobstructed and comply with the provisions of GB 50016.
4.3 A ventilation system shall be provided in the dipping area. Ventilation shall comply with the provisions of GB 6514 and GB 50019. The concentration of flammable gases in the dipping area shall not exceed 25% of their lower explosion limit (LEL).
4.4 Dipping booths shall comply with the following provisions:
a) When dipping operators are working, the concentration of chemical hazardous agents in the workplace air shall comply with the provisions of GBZ 2.1;
b) Dipping booths shall be equipped with independent ventilation systems;
c) Continuously operating dipping booths shall be equipped with combustible gas detection and alarm systems, fire alarm systems, and automatic fire extinguishing systems;
d) The alarm setpoint of combustible gas detectors shall not exceed 25% of the lower explosion limit (LEL) of the monitored combustible gas.
4.5 Lighting fixtures inside dipping booths shall be of explosion-proof or sealed explosion-proof lamp types; glass windows and observation windows on the booth structure shall be made of safety glass.
4.6 Open-top dip tanks with a volume ≤ 0.6 m³ or a liquid surface area ≤ 1 m² shall be equipped with non-combustible cover plates and dedicated fire extinguishing devices. Dip tanks with a volume > 0.6 m³ or a liquid surface area > 1 m² shall be equipped with dedicated or automatic fire extinguishing devices.
4.7 Prominent safety signs shall be posted in the dipping equipment area. Safety signs shall comply with the provisions of GB 5083 and GB 55037.
5 Dipping Equipment
5.1 Dip Tanks
5.1.1 The tank body shall be constructed of steel, reinforced concrete, or other non-combustible materials. For tanks with a volume exceeding 2 m³ or a liquid surface area exceeding 1 m², the fire resistance rating of the structural materials shall be not less than 1 hour.
5.1.2 Dip tanks placed underground shall have anti-leakage measures, and the tank opening shall be at least 150 mm above ground level. For dip tanks placed on the ground, when the distance between the tank opening and the ground floor or operating platform is less than 1050 mm, safety guardrails shall be installed around the tank opening.
