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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
Specifications of flexible graphite gaskets reinforced with tanged metal sheet for pipe flanges
WITHDRAWN published on 21.2.2005
Selected format:Grading standard for products of Chinese yellow-feathered chicken
WITHDRAWN published on 2.3.2005
Selected format:Preparation of instructions—Structuring, content and presentation
WITHDRAWN published on 3.3.2005
Selected format:Test method for air permeability of porous ceramic
WITHDRAWN published on 20.5.1980
Selected format:Classification and evaluation indicators for logistics enterprises
WITHDRAWN published on 24.3.2005
Selected format:Prestressed concrete cylinder pipe
WITHDRAWN published on 17.3.2005
Selected format:Rock wool, slag wool thermal insulating products for building
WITHDRAWN published on 17.3.2005
Selected format:Information and documentation—Bibliographic data element directory—Part 1:Interloan applications
WITHDRAWN published on 23.3.2005
Selected format:Information and documentation—Bibliographic data element directory—Part 2:Acquisitions applications
WITHDRAWN published on 23.3.2005
Selected format:Information and documentation—Bibliographic data element directory—Part 3:Information retrieval applications
WITHDRAWN published on 23.3.2005
Selected format:Latest update: 2025-12-24 (Number of items: 2 253 093)
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