Detail of GB 21148-2020

Introduction of GB 21148-2020

Foot protection - Safety footwear 1 Scope This standard specifies the terms and definitions, classifications, styles and marking, basic requirements, protective performance, additional requirements, identification and information of safety footwear that shall be provided by the manufacturer. This standard is applicable to footwear that protects the wearer's feet from hazards or safety in working area. 2 Normative references The following referenced documents are indispensable for the application 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 308.1 Rolling bearings - Balls - Part 1:Steel balls GB/T 20991-2007 Personal protective equipment - Test methods for footwear GB/T 22807 Leather and fur- -Chemical tests- Determination of chromium (VI) content : Colorimetric method GB 24541-2009 Hand protection - Protective gloves against mechanical risks GB/T 28287-2019 Foot protection - Test method for footwear slip resistance GB/T 28288-2012 Foot protection - Toecaps and penetration-resistant inserts GB/T 31009 Foot protection - Critical substance requirements and test methods for footwear 3 Terms and definitions For the purposes of this document, the following definitions and terms apply. 3.1 safety footwear footwear that protect the wearer from accidental injuries, have protective features and provide protection in working areas Note 1: It does not include boots for negative firefighting operations, footwear for chain sawing, footwear against chemicals, footwear against molten metal and splash of molten metal, and footwear for motorcycle riders. Note 2: Safety footwear components are illustrated in Figure 1, Figure 2 and Figure 3.   3.2 leather leather that won't rot after tanning 3.3 rubber vulcanized rubber 3.4 polymeric materials high molecular weight compound formed by repeatedly connecting structural units (monomers) through covalent bonds Example: polyurethane (PU) or polyvinyl chloride (PVC). 3.5 insole fixed sole component that is usually connected to the upper during footwear production 3.6 insock movable or fixed footwear part that covers part or all of the insole 3.7 lining material covering the inner surface of the upper Note 1: The wearer's feet are in direct contact with the lining. Note 2: At the opening of the front upper with the toecap, or external material is sewn on the upper to form a bagged toecap, and the material under toecap is the lining. 3.7.1 vamp lining material covering the inner surface of the front part of the upper 3.7.2 quarter lining material covering the inner surface of the rear side of the upper 3.8 cleat(s) convex part of the outer surface of the sole 3.9. rigid outsole sole that cannot bend to 45° at 30N load when the whole shoe is tested according to 8.4.1 in GB/T 20991-2007 3.10 cellular outsole outsole with density of 0.9 g/cm3 or less and with a porous structure that can be seen under a 10X magnifier 3.11 penetration-resistant insert a shoe part placed in a sole assembly to prevent penetration 3.12 toecap a shoe part installed in footwear to protect the toes of a wearer from the impact and crushing of heavy objects 3.13 seat region rear part of footwear (upper and sole), the rear 10% area of the whole shoe length 3.14 hybrid foot wear Class II footwear with other materials on the upper part of the upper

Contents of GB 21148-2020

GB 21148-2020 Foot protection - Safety footwear Contents Foreword 1 Scope 2 Normative References 3 Terms and definitions 4 Classification, styles and marking 5 Basic requirements 5.1 General 5.2 Finished shoes 5.3 Upper 5.4 Vamp and quarter lining 5.5 Tongue 5.6 Insole and insock 5.7 Outsoles 6 Protective performance 6.1 General 6.2 Toe protection 6.3 Puncture resistance 6.4 Electrical property 6.5 Resistance to harsh environment 7 Additional requirements 7.1 General 7.2 Energy absorption in seat area 7.3 Water resistance 7.4 Metatarsal protection 7.5 Ankle protection 7.6 Cutting prevention 7.7 Water permeability and water absorption of upper 7.8 Thermal contact resistance of outsole 7.9 Oil resistance of outsole 8 Identification 9 Information provided by the manufacturer 9.1 General requirements 9.2 Electrical property 9.3 Insock Annex A (Normative) Hybrid footwear Annex B (Normative) Test of nonmetal penetration-resistant insert Annex C (Normative) Electrical insulation performance withstand voltage test Annex D (Normative) Evaluation of shoes in thermal performance test Annex E Informative) Marking categories of international standards Bibliography