GB 21148-2020
On Jul 23rd, 2020, State Administration of market supervision and administration and State Standardization Administration issued Foot protection-Safety footwear product standard GB 21148-2020 and it became effective on Aug 1, 2021. The previous versions of GB 21148-2020 replacing and abolishing the standard are as follows:
- GB 12011-1989、GB 12011-2000、GB 12011-2009;
- GB 21146-2007;
- GB 21147-2007;
- GB 21148-2007.
The new standard is applicable to shoes that protect the wearer's feet from hazards in the work area or safety in the work area.
Main Technical Changes
GB 21148-2020 <Foot Protection-Safety footwear> is mainly based on GB 21148-2007, integrating the contents of GB 21146-2007, GB 21147-2007 and GB 12011-2009.
The main differences between GB 21148-2020 and GB 21148-2007:
- The scope of application has been revised
- Four terms of "safety shoes", "leather", "polymeric materials" and "protective Baotou" were revised; four terms of "conductive shoes", "antistatic shoes", "electric insulating shoes" and "fuel oil" were deleted; and the term of "mixed shoes" was added
- Part of shoe parts description has been modified
- Added and modified protective performance marking symbols
- The basic requirements and additional requirements of safety shoes are adjusted to basic requirements, protective performance and additional requirements
- Added shoe seat area requirements
- Modified the structure requirements of sole performance
- Revised Ergonomics requirements
- The requirement of slip resistance is added
- Increased the wear resistance requirements of shoe seat area lining
- The general requirements for toe protection are added
- The perforation force and structure requirements of perforation resistant insert are added and modified, and Appendix B is added accordingly
- The requirements of electrical insulation performance are modified and Appendix C is added accordingly
- The requirements of thermal insulation performance are modified and Appendix D is added accordingly
- Appendix A is deleted
- Added "mixed shoes" related content
- The information provided by the manufacturer shall include the statement of harmlessness and the requirement of safety information
- Appendix E is added to the adjustment
Main technical requirements of GB 21148-2020 <Foot Protection-Safety footwear>
| Basic Requirement | ||
|---|---|---|
| No. | Item | Requirement |
| 1 | Whole shoe | Upper height: meet the requirements of table 5; Upper / sole bonding strength: the bonding strength shall not be less than 4.0 N/mm; If the sole is torn, the bonding strength should not be less than 3.0 N/mm Leak proof: there should be no air leakage; Ergonomics requirements: GB/T 20991-2007, 5.1 requirements; Slip resistance: ceramic tile surface with detergent solution ≥ 0.28. |
| 2 | Upper | Thickness: rubber ≥ 1.50 mm, polymer ≥ 1.00 mm; Tearing property: leather ≥ 120 N, coated fabric / textile ≥ 60 N; Tensile property: it shall meet the requirements of table 10; Flexing resistance: Rubber 125,000 times without crack; polymer 150,000 times without crack; Water vapor permeability: ≥ 0.8 mg / (cm 2. h); Water vapor coefficient: ≥ 15 mg / cm2; pH: ≥ 3.2 (if pH < 4, dilution difference should be less than 0.7); Hydrolysis: Polyurethane uppers flex 150,000 cycles without cracks; Cr VI: ≤ 3.0 mg/kg. |
| 3 | Forepart and counter upper lining | Tearing property: leather ≥ 30 N, coated fabric and textile ≥ 15 N; Abrasion resistance: after the required number of tests, there should be no holes; Water vapor permeability: ≥ 2.0 mg / (cm2. h); Water vapor coefficient: ≥ 20 mg / cm2; pH: ≥ 3.2 (if pH < 4, dilution difference should be less than 0.7); Cr VI: ≤ 3.0 mg/kg. |
| 4 | Tongue | The tongue is tested only when the material or thickness of the tongue is different from that of the upper. |
| 5 | Insoles and insocks | Thickness: ≥ 2.0 mm; pH: ≥ 3.2 (if pH < 4, dilution difference should be less than 0.7); Water absorption: ≥ 70 mg / cm2; Hydrolytic absorption: ≥ 80% of water absorption; Abrasion resistance: non leather insole should not be worn seriously before 400 times; Insoles: non leather insoles shall not have any holes on the surface after the required number of wear tests; Cr VI: ≤ 3.0mg/kg. |
| 6 | Outsole | The thickness shall meet the requirements of table 14; Tear strength: ≥ 8kN/m if material density ＞ 0.9 g/cm3; ≥ 5 kN/m if material density ≤ 0.9 g/cm3; Abrasion resistance: Type I shoe: ≤ 150 mm3 if material density > 0.9 g/cm3; ≤ 250 mm3 if material density ≤ 0.9 g/cm3; Type II shoe: ≤ 250 mm3; Class II electrical insulating shoes of 20kV and above:≤ 400mm ³； Flexing resistance: 30,000 cycles, cut growth ≤ 4 mm; Hydrolysis: Polyurethane insole flexes 150,000 cycles continuously, and the cut growth is ≤ 6mm; Bonding strength of middle layer: ≥ 4.0 N/mm, sole tear: ≥ 3.0 N/mm. |
| Protection Performance | ||
|---|---|---|
| No. | Item | Requirement |
| 1 | Toe protection | Internal length of protective toecap: it shall meet the requirements of table 15; Impact resistance: after the impact of (200 ± 4) J or (100 ± 2) J impact energy, the minimum spacing in the protective toecap shall meet the requirements of table 16; Pressure resistance: after the impact of (15 ± 0.1) kN or (10 ± 0.1) kN impact energy, the minimum spacing in the protective toecap shall meet the requirements of table 16; Corrosion resistance of metal protective toecap: the corrosion area shall not exceed 3 places and the length shall not exceed 2 mm. |
| 2 | Perforation resistance | Metal perforation resistant insert: penetration ≥ 1100 N; Non-metal perforation resistant insert: 1100 N, observed within 10s, the nail tip should not be exposed from the sample; Structure: the perforation resistant insert should be installed in the sole, and the insert should not be movable without damaging the shoes. Except for the non-metallic perforation resistant insert which is used as the insole, the insert should not be located above or in contact with the roll edge of the protective cap; Dimensions: shall meet the requirements of clause 6.3.3; Perforation resistant insert folding resistance: 1*106 after bending, there should be no visible fracture, crack or delamination phenomenon; Corrosion resistance of metal perforation resistant insert: the corrosion area shall not exceed 5 places, and the area of each place shall not exceed 2.5 mm2; Stability of non-metallic perforation resistant insert: it shall meet the requirements of article 5.2.4 of GB/T 28288-2012. |
| 3 | Electrical properties | Conductivity: resistance ≤ 100 kΩ; Antistatic performance: 100 kΩ＜ resistance ≤ 1000 MΩ; Electrical insulation performance: it shall meet the requirements of table 17. |
| 4 | Resistance to harsh environment | Heat insulation: the temperature rise of the upper surface of the inner bottom shall not exceed 22 ℃ after 30 min; Cold resistance: the temperature of the upper surface of the inner bottom shall not decrease more than 10 ℃ after the test. |
| Additional Requirements | ||
|---|---|---|
| No. | Item | Requirement |
| 1 | Energy absorption in shoe seat area | ≥20 J |
| 2 | Water Resistance | After the test, the total wetted area of the inner side of the shoe should not exceed 3 cm² |
| 3 | Metatarsal protection | The minimum spacing after impact shall meet the requirements of table 19 Average value ≤ 10 kN, single value ≤ 15 kN |
| 4 | Ankle protection | Average value ≤ 10 kN, single value ≤ 15 kN |
| 5 | Anti-cutting | The anti-cutting index should not be less than 2.5 |
| 6 | Water permeability and water absorption of upper | Water permeability ≤ 0.2 g, water absorption ≤ 30% |
| 7 | Thermal contact resistance of the outsoles | There shall be no melting and no cracking when bending along the circular axis |
| 8 | Oil resistance of outsoles | Volume expansion≤ 12%; Volume shrinkage is more than 1% or hardness increase is more than 10 Shore A, continuous flexion 150,000 times, incision growth should not be more than 6 mm. |
Details of The Technical Content
For more information, please refer to the standard GB 21148-2020 <Foot Protection-Safety footwear> or contact SGS directly.
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