Definitions of some terms used in the tyre industry — Part 2: Solid tyres — Amendment 1
2Expert Interpretation
In-depth analysis of the technical updates of the conductive solid tire terminology in the revised version of ISO 4223-2:2020, comparison of the differences between the old and new definitions, and analysis of the impact of the revised standard on the anti-static safety of industrial vehicles. Includes recommendations for standard implementation and descriptions of typical application scenarios.
Background of Standard Revision
ISO 4223-2:1991/Amd.1:2020 is the first revision of the 1991 version of the solid tire terminology standard by the International Organization for Standardization. It mainly updates the definition of conductive solid tire. This revision reflects the latest development requirements of anti-static technology for industrial vehicles in the past 30 years.
Comparison of term definition changes
| Term type | 1991 version definition | 2020 revised version definition | Technical differences |
|---|---|---|---|
| Conductive solid tire | No clear distinction between conductivity levels | Added discharge speed requirements | Emphasis on prevention of spontaneous discharge |
| Static dissipative tire | Only describes basic conductivity | Clearly defines static charge conduction capability | Added quantitative performance indicators |
Analysis of key technical changes
1. Conductivity classification
The new standard divides solid tires into: - Conventional conductivity type (Article 2.4): basic electrostatic dissipation capability
- High conductivity type (Article 2.5): requires a millisecond discharge speed
2. Explosion-proof application requirements
In flammable and explosive environments, the revised standard requires the use of highly conductive solid tires with a surface resistance of ≤106Ω to ensure that static charges can be quickly conducted away.
Implementation recommendations
- Chemical, pharmaceutical and other industries should update equipment procurement specifications in accordance with the new standards
- Tire manufacturers need to clearly mark the conductivity type in technical documents
- It is recommended to test the surface resistance value of conductive tires every quarter
Typical application scenarios
- Pharmaceutical factory clean room: Use highly conductive solid tires to avoid electrostatic adsorption of particles
- Oil depot forklifts: Must be equipped with explosion-proof tires that meet the definition in Article 2.5