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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
Metallic and other non-organic coatings—Corrodkote corrosion test(CORR test)
WITHDRAWN published on 11.6.1986
Selected format:Electrodeposited chromium coatings—Electrolytic corrosion testing (EC test)
WITHDRAWN published on 11.6.1986
Selected format:The involute master of gear
WITHDRAWN published on 1.1.1986
Selected format:The involute master of gear
WITHDRAWN published on 28.12.2001
Selected format:The helix master of gear
WITHDRAWN published on 1.1.1986
Selected format:The helix master of gear
WITHDRAWN published on 28.12.2001
Selected format:Surface grinding machines with horizontal spindle and rectangular table—Parameters
WITHDRAWN published on 11.6.1986
Selected format:Surface grinding machines with horizontal grinding wheel spindle and reciprocating table—Parameters
WITHDRAWN published on 9.6.2004
Selected format:Chemical reagent—Potassium nitrate
WITHDRAWN published on 1.3.1993
Selected format:External cylindrical centerless grinding machines--Parameters
WITHDRAWN published on 11.6.1986
Selected format:Latest update: 2026-04-14 (Number of items: 2 272 146)
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