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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
Cast aluminium-copper alloys--Grain size
WITHDRAWN published on 1.1.1989
Selected format:Terminology for the theory of machines and mechanisms
WITHDRAWN published on 31.3.1989
Selected format:Weld outerdimesions for steel construction
WITHDRAWN published on 1.1.1989
Selected format:Inverted tooth chains and chainwheels
WITHDRAWN published on 31.3.1989
Selected format:Inverted tooth(silent)chains and sprockets
WITHDRAWN published on 29.10.2003
Selected format:General specifications of double--Turbinetorque converter
WITHDRAWN published on 31.3.1989
Selected format:Steel roller chains, types S and C, attachments and chain wheels
WITHDRAWN published on 1.1.1989
Selected format:Aluminium and aluminium alloy welding rods and wires
WITHDRAWN published on 31.3.1989
Selected format:Aluminium and aluminium alloy wires and rods
WITHDRAWN published on 16.4.2008
Selected format:Nickel base brazing filler metals
WITHDRAWN published on 31.3.1989
Selected format:Latest update: 2026-04-05 (Number of items: 2 271 011)
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