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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
Chemical analysis for silicon carbide refractories—Determination of ferric oxide—o-phenanthroline photometric method
WITHDRAWN published on 27.9.1996
Selected format:Chemical analysis for silicon carbide refractories—Determination of silicon dioxide
WITHDRAWN published on 27.9.1996
Selected format:Self-contained compressed air breathing apparatus
WITHDRAWN published on 9.10.1996
Selected format:Safety signs for life-saving on sea-going ship
WITHDRAWN published on 9.10.1996
Selected format:Safety signs for life-saving on sea-going ship
WITHDRAWN published on 14.1.2011
Selected format:The ship maintenance system—General rules
WITHDRAWN published on 9.10.1996
Selected format:The ship maintenance system—Numbering of ship equipments and code number
WITHDRAWN published on 9.10.1996
Selected format:The ship maintenance system—Maintenance grades, standard code and permissible deviation for maintenance period of ship
WITHDRAWN published on 9.10.1996
Selected format:The ship maintenance system—Code and description for the work card
WITHDRAWN published on 9.10.1996
Selected format:The ship maintenance system—Planning schedule for work cards in the first maintenance period
WITHDRAWN published on 9.10.1996
Selected format:Latest update: 2025-09-15 (Number of items: 2 233 685)
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