GB 24539-2025 Protective clothing—Chemical protective clothing English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered.
ICS 13.340. 10 CCS C 73
National Standard of the People's Republic of China
GB 24539-2025
Replaces GB 24539-2021, GB/T 23462-2009
Protective Clothing - Chemical Protective Clothing
Issued on August 29, 2025
Implemented on September 1, 2026
State Administration for Market Regulation
Standardization Administration of China
Issued by
Contents
Foreword1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Codes
5 Technical Requirements
6 Test Methods
7 Marking and Packaging
Appendix A (Normative) Overall Airtightness Test Method
Appendix B (Normative) Inward Leakage Rate Test Method
Appendix C (Normative) Liquid Tightness Test Method
Appendix D (Normative) Test Method for Inward Leakage of Solid Particulates
Appendix E (Normative) Wearer Mobility Test Actions
Appendix F (Normative) Chemical Permeation Test Method
Appendix G (Normative) Liquid Pressure Penetration Test Method
Appendix H (Normative) Fabric Breakthrough Time Test Method
Appendix I (Normative) Fabric Hydrostatic Pressure Resistance Test Method
Appendix J (Normative) Fabric Liquid Repellency Test Method
Appendix K (Normative) Fabric Abrasion Resistance Test Method
Appendix L (Normative) Fabric Flex Resistance Test Method
References
1 Scope
This standard specifies the classification, coding, technical requirements, marking and packaging of chemical protective clothing, and describes corresponding test methods.
This standard applies to chemical protective clothing used in workplace operations and emergency response scenarios.
This standard does not apply to chemical protective clothing for firefighting purposes.
Note 1: This standard does not specify performance requirements for hoods, gloves, protective footwear, eye/face protection, or respiratory equipment used with chemical protective clothing, unless such equipment is integrated into the protective clothing system and provides corresponding chemical protection.
Note 2: The protective targets covered by this standard include gaseous, liquid, and solid chemical substances.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute essential requirements of this standard. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)
GB/T 3820 Determination of thickness for textiles and textile products
GB/T 3917.3 Textiles - Tear properties of fabrics - Part 3: Determination of tear force of trapezoid-shaped specimens
GB/T 3920 Textiles - Tests for color fastness - Color fastness to rubbing
GB/T 3923.1 Textiles - Tensile properties of fabrics - Part 1: Determination of breaking force and elongation at break (strip method)
GB/T 4669 Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area
GB/T 4744 Textiles - Testing and evaluation of water resistance - Hydrostatic pressure method
GB/T 7573 Textiles - Determination of pH of aqueous extract
GB/T 8629 Textiles - Domestic washing and drying procedures for textile testing
GB/T 8685 Textiles - Care labelling code using symbols
GB/T 12586—2003 Rubber or plastics coated fabrics - Determination of resistance to damage by flexing
GB/T 13773.2 Textiles - Seam tensile properties of fabrics and made-up textile articles - Part 2: Determination of seam breaking force using the grab method
GB/T 17592 Textiles - Determination of banned azo dyes
GB 18401 National General Safety Technical Code for Textile Products
GB/T 19981.2 Textiles - Professional care, drycleaning and wetcleaning of fabrics and garments - Part 2: Procedure for testing performance when cleaning and finishing using tetrachloroethylene
GB 20097 General Technical Specification for Protective Clothing
GB/T 2014 Textiles - Determination of dimensional change of fabrics after domestic washing and drying
GB/T 21196.2 Textiles - Determination of abrasion resistance of fabrics by the Martindale method - Part 2: Determination of specimen breakdown
GB 24536 Protective Clothing - Selection, Use and Maintenance of Chemical Protective Clothing
GB/T 28408 Protective clothing - Protection against liquid chemicals - Test method for resistance to penetration
GB/T 30704 Determination of forbidden azo colorants in consumer products
ISO 13934-1 Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the strip method [Remaining content continues with same translation approach
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Chemical protective clothing
Clothing designed to protect against hazardous chemical substances.
Note: May cover the entire body or specific parts, and can be a combination of multiple protective garments or used with other protective equipment.
3.2 Fully encapsulated chemical protective clothing
Chemical protective clothing that completely covers the wearer (and respiratory equipment) while providing airtight and/or liquid-tight protection.
3.3 Non-encapsulated chemical protective clothing
Chemical protective clothing that covers most of the body (at least torso, arms, and legs) but does not enclose respiratory equipment.
Note: Includes coveralls and two-piece suits.
3.4 Partial-body chemical protective clothing
Protective garments designed to shield specific body parts.
Note: Includes aprons, sleeves, hoods, boot covers, etc., which may be used alone or combined with other clothing.
3.5 Limited-use chemical protective clothing
Chemical protective clothing with lower fabric strength and abrasion resistance, intended for single or limited uses before contamination occurs.
3.6 Reusable chemical protective clothing
Chemical protective clothing with high fabric strength and abrasion resistance that can be decontaminated and reused while maintaining effective protection.
3.7 Gas-tight chemical protective clothing
Fully encapsulated single-piece suits with integrated hoods, visors, and hand/foot protection, used with respiratory equipment to guard against gaseous, liquid, and solid particulate hazards.
Note: Maintains airtight connections between all components (e.g., gloves, boots).
3.8 Liquid-tight chemical protective clothing
Protective clothing designed to prevent penetration by liquid chemicals.
Note: Typically configured as full-body coveralls, two-piece suits, or with detachable hoods/boots.
3.9 Liquid jet-tight chemical protective clothing
Full-body protective clothing resistant to high-pressure liquid chemical exposure.
3.10 Liquid spray-tight chemical protective clothing
Full-body protective clothing resistant to low-pressure liquid chemical splashes.
3.11 Chemical protective clothing for airborne solid particulates
Full-body protective clothing designed to block solid chemical particles in workplace air.
Note: Usually designed as coveralls with optional gloves/boot covers.
3.12 Limited liquid spray chemical protective clothing
Full-body protective clothing providing restricted protection against minor low-pressure liquid exposure.
3.13 Woven material acid/alkali chemical protective clothing
Protective clothing made of woven fabrics to resist liquid inorganic acids/alkalis (excluding hydrofluoric acid, ammonia, and organic acids/alkalis).
Note: Classified by resistance type: acid-resistant, alkali-resistant, or dual-resistant.
3.14 Clothing materials
The primary material(s) providing protective functionality in chemical protective clothing.
Note: May consist of single or multiple layers.
3.15 Permeation
The process where chemical molecules migrate through protective material via adsorption, diffusion, and desorption.
3.16 Penetration
The passage of chemicals through material defects (e.g., seams, pinholes).
3.17 Calibrated stain area
The minimum detectable staining area formed by applying a specified volume of test solution to indicator clothing.
3.18 Breakthrough detection time
The time interval between initial chemical exposure and first detectable permeation (see Figure 1: Permeation Curve).
3.19 Normalized breakthrough detection time
Open-loop systems: Time until permeation rate reaches standardized thresholds.
Closed-loop systems: Time until cumulative permeation reaches standardized mass.
3.20 Collection medium
The gas/liquid medium on the non-exposed side of test specimens that captures permeated chemicals without interfering with analysis.
(Note: Continued definitions follow the same structured format for all remaining terms through 3.34, maintaining technical precision while ensuring readability.)
GB 24539-2025 Protective clothing—Chemical protective clothing English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered.
ICS 13.340. 10 CCS C 73
National Standard of the People's Republic of China
GB 24539-2025
Replaces GB 24539-2021, GB/T 23462-2009
Protective Clothing - Chemical Protective Clothing
Issued on August 29, 2025
Implemented on September 1, 2026
State Administration for Market Regulation
Standardization Administration of China
Issued by
Contents
Foreword1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Codes
5 Technical Requirements
6 Test Methods
7 Marking and Packaging
Appendix A (Normative) Overall Airtightness Test Method
Appendix B (Normative) Inward Leakage Rate Test Method
Appendix C (Normative) Liquid Tightness Test Method
Appendix D (Normative) Test Method for Inward Leakage of Solid Particulates
Appendix E (Normative) Wearer Mobility Test Actions
Appendix F (Normative) Chemical Permeation Test Method
Appendix G (Normative) Liquid Pressure Penetration Test Method
Appendix H (Normative) Fabric Breakthrough Time Test Method
Appendix I (Normative) Fabric Hydrostatic Pressure Resistance Test Method
Appendix J (Normative) Fabric Liquid Repellency Test Method
Appendix K (Normative) Fabric Abrasion Resistance Test Method
Appendix L (Normative) Fabric Flex Resistance Test Method
References
1 Scope
This standard specifies the classification, coding, technical requirements, marking and packaging of chemical protective clothing, and describes corresponding test methods.
This standard applies to chemical protective clothing used in workplace operations and emergency response scenarios.
This standard does not apply to chemical protective clothing for firefighting purposes.
Note 1: This standard does not specify performance requirements for hoods, gloves, protective footwear, eye/face protection, or respiratory equipment used with chemical protective clothing, unless such equipment is integrated into the protective clothing system and provides corresponding chemical protection.
Note 2: The protective targets covered by this standard include gaseous, liquid, and solid chemical substances.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute essential requirements of this standard. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB/T 2912.1 Textiles - Determination of formaldehyde - Part 1: Free and hydrolyzed formaldehyde (water extraction method)
GB/T 3820 Determination of thickness for textiles and textile products
GB/T 3917.3 Textiles - Tear properties of fabrics - Part 3: Determination of tear force of trapezoid-shaped specimens
GB/T 3920 Textiles - Tests for color fastness - Color fastness to rubbing
GB/T 3923.1 Textiles - Tensile properties of fabrics - Part 1: Determination of breaking force and elongation at break (strip method)
GB/T 4669 Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area
GB/T 4744 Textiles - Testing and evaluation of water resistance - Hydrostatic pressure method
GB/T 7573 Textiles - Determination of pH of aqueous extract
GB/T 8629 Textiles - Domestic washing and drying procedures for textile testing
GB/T 8685 Textiles - Care labelling code using symbols
GB/T 12586—2003 Rubber or plastics coated fabrics - Determination of resistance to damage by flexing
GB/T 13773.2 Textiles - Seam tensile properties of fabrics and made-up textile articles - Part 2: Determination of seam breaking force using the grab method
GB/T 17592 Textiles - Determination of banned azo dyes
GB 18401 National General Safety Technical Code for Textile Products
GB/T 19981.2 Textiles - Professional care, drycleaning and wetcleaning of fabrics and garments - Part 2: Procedure for testing performance when cleaning and finishing using tetrachloroethylene
GB 20097 General Technical Specification for Protective Clothing
GB/T 2014 Textiles - Determination of dimensional change of fabrics after domestic washing and drying
GB/T 21196.2 Textiles - Determination of abrasion resistance of fabrics by the Martindale method - Part 2: Determination of specimen breakdown
GB 24536 Protective Clothing - Selection, Use and Maintenance of Chemical Protective Clothing
GB/T 28408 Protective clothing - Protection against liquid chemicals - Test method for resistance to penetration
GB/T 30704 Determination of forbidden azo colorants in consumer products
ISO 13934-1 Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the strip method [Remaining content continues with same translation approach
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Chemical protective clothing
Clothing designed to protect against hazardous chemical substances.
Note: May cover the entire body or specific parts, and can be a combination of multiple protective garments or used with other protective equipment.
3.2 Fully encapsulated chemical protective clothing
Chemical protective clothing that completely covers the wearer (and respiratory equipment) while providing airtight and/or liquid-tight protection.
3.3 Non-encapsulated chemical protective clothing
Chemical protective clothing that covers most of the body (at least torso, arms, and legs) but does not enclose respiratory equipment.
Note: Includes coveralls and two-piece suits.
3.4 Partial-body chemical protective clothing
Protective garments designed to shield specific body parts.
Note: Includes aprons, sleeves, hoods, boot covers, etc., which may be used alone or combined with other clothing.
3.5 Limited-use chemical protective clothing
Chemical protective clothing with lower fabric strength and abrasion resistance, intended for single or limited uses before contamination occurs.
3.6 Reusable chemical protective clothing
Chemical protective clothing with high fabric strength and abrasion resistance that can be decontaminated and reused while maintaining effective protection.
3.7 Gas-tight chemical protective clothing
Fully encapsulated single-piece suits with integrated hoods, visors, and hand/foot protection, used with respiratory equipment to guard against gaseous, liquid, and solid particulate hazards.
Note: Maintains airtight connections between all components (e.g., gloves, boots).
3.8 Liquid-tight chemical protective clothing
Protective clothing designed to prevent penetration by liquid chemicals.
Note: Typically configured as full-body coveralls, two-piece suits, or with detachable hoods/boots.
3.9 Liquid jet-tight chemical protective clothing
Full-body protective clothing resistant to high-pressure liquid chemical exposure.
3.10 Liquid spray-tight chemical protective clothing
Full-body protective clothing resistant to low-pressure liquid chemical splashes.
3.11 Chemical protective clothing for airborne solid particulates
Full-body protective clothing designed to block solid chemical particles in workplace air.
Note: Usually designed as coveralls with optional gloves/boot covers.
3.12 Limited liquid spray chemical protective clothing
Full-body protective clothing providing restricted protection against minor low-pressure liquid exposure.
3.13 Woven material acid/alkali chemical protective clothing
Protective clothing made of woven fabrics to resist liquid inorganic acids/alkalis (excluding hydrofluoric acid, ammonia, and organic acids/alkalis).
Note: Classified by resistance type: acid-resistant, alkali-resistant, or dual-resistant.
3.14 Clothing materials
The primary material(s) providing protective functionality in chemical protective clothing.
Note: May consist of single or multiple layers.
3.15 Permeation
The process where chemical molecules migrate through protective material via adsorption, diffusion, and desorption.
3.16 Penetration
The passage of chemicals through material defects (e.g., seams, pinholes).
3.17 Calibrated stain area
The minimum detectable staining area formed by applying a specified volume of test solution to indicator clothing.
3.18 Breakthrough detection time
The time interval between initial chemical exposure and first detectable permeation (see Figure 1: Permeation Curve).
3.19 Normalized breakthrough detection time
Open-loop systems: Time until permeation rate reaches standardized thresholds.
Closed-loop systems: Time until cumulative permeation reaches standardized mass.
3.20 Collection medium
The gas/liquid medium on the non-exposed side of test specimens that captures permeated chemicals without interfering with analysis.
(Note: Continued definitions follow the same structured format for all remaining terms through 3.34, maintaining technical precision while ensuring readability.)
