Detail of GB 24539-2021

Introduction of GB 24539-2021

Protective clothing - Chemical protective clothing 1 Scope This document specifies the classification, grading, labeling, basic technical requirements and test methods of chemical protective clothing. This document is applicable to chemical protective clothing required by operating personnel in workplaces and emergency rescue work. This document is not applicable to chemical protective clothing used in firefighting and other applications. Note 1: This document does not address performance indicator requirements for personal protective equipment such as gloves, protective boots/shoes, face masks, sight windows, safety glasses and respiratory devices, unless they are an integral part of the protective clothing and provide corresponding chemical protective performance. Note 2: The protection objects covered by this document include gaseous, liquid and solid chemicals. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any 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 of textiles and textile products GB/T 3917.3 Textiles - Tear properties of fabrics - Part 3: Determination of tear force of trapezoid-shaped test specimens GB/T 3920 Textiles - Tests for colour fastness - Colour fastness to rubbing GB/T 3923.1 Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the 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 for 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 labeling code using symbols GB/T 12586 Rubber-or plastics-coated fabrics - Determination of resistance to damage by flexing GB/T 13640 Size designation of protective clothing GB/T 13773.2 Textiles - Seam tensile properties of fabrics and made-up textile articles - Part 2: Determination of maximum force to seam rupture using the grab method GB/T 17592 Textiles - Determination of the banned azo colourants 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 tetrachloroethene GB/T 20655 Protective clothing - Mechanical properties - Determination of the resistance to puncture GB/T 21196.2-2007 Textiles - Determination of the abrasion resistance of fabrics by the Martindale method - Part 2: Determination of specimen breakdown GB/T 21294-2014 Testing methods of physical and chemical performance of garments GB/T 23344 Textiles - Determination of 4-aminoazobenzene GB/T 23462 Protective clothing - Test method for chemical protective materials to permeation by chemicals ISO 15797 Textiles - Industrial washing and finishing procedures for testing of workwear 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 chemical protective clothing clothing worn to protect the body against chemicals Note: Such clothing may cover the whole, or greater part of the body, i.e. trunk, arms and legs. The chemical protective clothing may consist of garments combined together to provide protection to the body, and may also be used in combination with other protective equipment. 3.2 fully encapsulated chemical protective clothing clothing that may completely cover the wearer (or completely cover the wearer and respiratory protective equipment) and may provide gas-tight and/or liquid-tight protection 3.3 non-encapsulated chemical protective clothing clothing that protects greater part of the body, including at least trunk, arms and legs, which is unnecessarily to cover the respiratory equipment used by the wearer Note: It is classified into one-piece coveralls or two-piece suits. 3.4 limited use chemical protective clothing protective clothing that has low requirements imposed on the strength and abrasion resistance of clothing materials and may be used only once or for a limited number of times until it is contaminated 3.5 reusable chemical protective clothing protective clothing that has high requirements imposed on the strength and abrasion resistance of clothing materials, and once used, may still provide effective protection after necessary decontamination treatment and qualification 3.6 gas-tight chemical protective suits one-piece chemical protective clothing with hood, sight window and hand and foot protection, which can provide the wearer with protection against a high level of toxic and harmful chemicals (gaseous, liquid and solid particulates, etc.) when equipped with appropriate respiratory protective equipment 3.7 chemical protective clothing for emergency response team type of chemical protective clothing worn by operating personnel in emergency rescue work Note: The chemical protective clothing for emergency response team is represented by the abbreviation "ET", e.g. gas-tight chemical protective suits for emergency response team and liquid jet tight chemical protective clothing for emergency response team. 3.8 gas-tight chemical protective suits for emergency response team type of one-piece chemical protective clothing with hoods, sight windows and hand and foot protection required by operating personnel in emergency rescue work, which provides the wearer with protection against toxic and harmful chemicals such as gaseous, liquid and solid particulates 3.9 liquid tight chemical protective clothing clothing providing protection against liquid chemicals Note: Full-body protective clothing with liquid tight connection between all parts of protective clothing and the equipment such as hood, gloves, shoes and boots, face panel or respiratory protective equipment used with it. It may be a one-piece coverall, a two-piece suit, or clothing with hood, face panel, socks, boots, gloves, etc. 3.10 liquid jet tight chemical protective clothing full-body protective clothing providing protection against liquid chemicals under high pressure Note: Protective clothing with liquid jet tight connection between all parts of protective clothing and the equipment such as hood, gloves, shoes and boots, face panel or respiratory protective equipment used with it. It may be a one-piece coverall, a two-piece suit, or clothing with hood, face panel, socks, boots, gloves, etc. 3.11 liquid spray tight chemical protective clothing full-body protective clothing providing protection against liquid chemicals under low or no pressure

Contents of GB 24539-2021

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Classification and codes 5 Technical requirements 6 Test methods 7 Labeling Annex A (Normative) Test method for overall gas tightness of chemical protective clothing Annex B (Normative) Test method for inward leakage of chemical protective clothing Annex C (Normative) Test method for liquid tightness of chemical protective clothing Annex D (Normative) Test method for inward leakage of chemical protective clothing providing protection against airborne solid particulate Annex E (Normative) Test subject actions in practical performance test and evaluation Annex F (Normative) Test method for resistance to penetration by liquid under pressure Annex G (Normative) Test method for penetration time of woven material liquid acid and alkali chemical protective clothing materials Annex H (Normative) Test method for resistance of woven material liquid acid and alkali chemical protective clothing materials to hydrostatic pressure Annex I (Normative) Test method for liquid repellency of chemical protective clothing material Annex J (Normative) Test method for abrasion resistance of chemical protective clothing materials Annex K (Normative) Test method for resistance to damage by flexing of chemical protective clothing materials Bibliography