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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
Marine steel flanged steam pressure reducing valves
WITHDRAWN published on 24.5.1993
Selected format:General specification for hydrometric instruments—Part 1:General rules
WITHDRAWN published on 27.1.2003
Selected format:General specification for hydrometric instruments—Part 2:Referential operating condition
WITHDRAWN published on 9.9.2002
Selected format:General specification for hydrologic instruments—Part 3:Basic performance and description method
WITHDRAWN published on 12.11.2001
Selected format:General specification for hydrometric instrument—Part 4:Basic requirements of structure
WITHDRAWN published on 9.9.2002
Selected format:General specification for hydrometric instrument—Part 6:Inspection regulation, mark, package, transportation, storage and operation manual
WITHDRAWN published on 24.12.2007
Selected format:Codex general technical requirement for food irradiation
WITHDRAWN published on 5.12.2001
Selected format:Code of good irradiation practice for apples
WITHDRAWN published on 5.12.2001
Selected format:Occupatonal exposure limit for ultraviolet radiation in the work environment
WITHDRAWN published on 4.12.2001
Selected format:Occupatonal exposure limit for acetaldehyde in the air of workplace
WITHDRAWN published on 4.12.2001
Selected format:Latest update: 2025-12-24 (Number of items: 2 253 093)
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