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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
Excitation system for synchronous electrical machines—Technical requirements of excitation system for large and medium synchronous generators
WITHDRAWN published on 10.4.1997
Selected format:Pulps--Determination of moisture content
WITHDRAWN published on 22.2.1989
Selected format:Pulps—Determination of moisture content
WITHDRAWN published on 25.8.2003
Selected format:Terms of vitreous and porcelain enamels
WITHDRAWN published on 14.3.1987
Selected format:Plant quarantine rules for producing areas of stock (superior) cotton seed
WITHDRAWN published on 14.3.1987
Selected format:Plant quarantine rules for producing areas of wheat seed
WITHDRAWN published on 14.3.1987
Selected format:Plant quarantine rules for producing areas of sweet potato seedling and sweet potato seed
WITHDRAWN published on 14.3.1987
Selected format:Seed storage of main agricultural crops
WITHDRAWN published on 13.3.1987
Selected format:Malting Barley
WITHDRAWN published on 14.8.2000
Selected format:AX series relays
WITHDRAWN published on 1.1.1987
Selected format:Latest update: 2026-06-15 (Number of items: 2 282 497)
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