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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
Ambient air--Determination of nitrogen oxides--Saltzman method
WITHDRAWN published on 4.1.1995
Selected format:Ambient air--Determination of ozone--Indigo disulphonate spectrophotometry
WITHDRAWN published on 4.1.1995
Selected format:Ambient air--Determination of ozone--Ultraviolet photometric method
WITHDRAWN published on 4.1.1995
Selected format:Air quality--Determination of benzapyrene in ambient air--High performance liquid chromatography
WITHDRAWN published on 4.1.1995
Selected format:Classification and test methods for fire retardancy of finishing fire retardant paints Classification for fire retardancy
WITHDRAWN published on 9.1.1995
Selected format:Classification and test methods for fire retardancy of finishing fire retardant paints Big panel method
WITHDRAWN published on 9.1.1995
Selected format:Classification and test methods for fire retardancy of finishing fire retardant paints Tunnel method
WITHDRAWN published on 9.1.1995
Selected format:Classification and test methods for fire retardancy of finishing fire retardant paints Cabinet method
WITHDRAWN published on 9.1.1995
Selected format:Pressurized water reactor pressure vessel—The principle of selecting materials and the basic requirements of the materials
WITHDRAWN published on 12.1.1995
Selected format:Graphical representation of results of particle size analysis
WITHDRAWN published on 10.1.1995
Selected format:Latest update: 2026-06-24 (Number of items: 2 284 377)
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