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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Converter transformers—Part 1:Transformers for industrial applications
Standard published on 3.9.2014
Selected format:Convetor transformers—Part 2:Transformers for HVDC applications
Standard published on 9.3.2022
Selected format:Converter transformers—Part 3: Application guide
Standard published on 17.3.2023
Selected format:Resistance welding equipment—Transformers—Integrated transformers for welding guns
Standard published on 1.8.2025
Selected format:Electromechanical switches for use in electronic equipment--Part 4:Sectional specification for lever(toggle) switches
Standard published on 2.11.2001
Selected format:Electromechanical switches for use in electronic equipment Part 4-1:Sectional specification for lever(toggle)switches Blank detail specification
Standard published on 18.1.2005
Selected format:Characteristics of electric infrared emitters for industrial heating—Part 1: Shortwave electric infrared emitters
Standard published on 4.6.2019
Selected format:Characteristics of electric infrared emitters for industrial heating—Part 2: Mediumwave and longwave electric infrared emitters
Standard published on 4.6.2019
Selected format:Interworking between packet switched public data networks and public maritime mobile satellite data transmission systems
Standard published on 5.11.2001
Selected format:Residual current-operated protective devices (RCD) for household and similar use—Electromagnetic compatibility
Standard published on 31.10.2025
Selected format:Latest update: 2026-09-11 (Number of items: 2 300 165)
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