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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
Test method for leveller
WITHDRAWN published on 1.1.1991
Selected format:Built-in thermal protection for rotating electrical machines Rules for protection of rotating electrical machines
WITHDRAWN published on 5.5.1991
Selected format:Rotating electrical machines—Thermal protection
WITHDRAWN published on 23.4.2008
Selected format:Method for pneumatic test of dissolved acetylene cylinders
WITHDRAWN published on 3.4.1991
Selected format:Periodic inspection and evaluation of seamless steel gas cylinders
WITHDRAWN published on 11.2.1999
Selected format:Terminology of gas cylinders
WITHDRAWN published on 30.4.1991
Selected format:NPSH for centrifugal, mixed flow and axial pumps
WITHDRAWN published on 23.3.1991
Selected format:Efficiencies for centrifugal pumps
WITHDRAWN published on 23.3.1991
Selected format:Technical specifications for mixed and axial flow pumps
WITHDRAWN published on 23.3.1991
Selected format:General use plywood of tropical broadleaved species
WITHDRAWN published on 3.5.1991
Selected format:Latest update: 2026-01-16 (Number of items: 2 254 749)
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