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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
Flared couplings - Style B nut
Standard published on 7.5.2008
Selected format:Flared couplings - Lock nut and lockup washer
Standard published on 7.5.2008
Selected format:Flared couplings - Inverted flare bolts
Standard published on 7.5.2008
Selected format:Flared couplings - Seat insert
Standard published on 7.5.2008
Selected format:Flared couplings - Flared end
Standard published on 7.5.2008
Selected format:Flared couplings - Specification
Standard published on 7.5.2008
Selected format:Insulating liquids - Measurement of relative permittivity, dielectric dissipation factortanand d.c. resistivity
Standard published on 3.12.2007
Selected format:Technical specification for centrifugal pumps - Class
Standard published on 25.8.2008
Selected format:Technical specifications for centrifugal pumps ( Class )
Standard published on 17.12.2013
Selected format:End-suction centrifugal pumpsBaseplate and installation dimensions
Standard published on 17.12.2013
Selected format:Latest update: 2026-06-26 (Number of items: 2 284 409)
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