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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
Determination of sound power levels of refrigeration and air-conditioning equipment—Sound pressure methods
Standard published on 31.10.2025
Selected format:Determination of sound power level for noise emitted by reciprocating pump - Engineering method
Standard published on 1.7.2008
Selected format:Bolt or screw and washer assemblies with plain washers
Standard published on 28.12.2018
Selected format:Cross recessed raised countersunkhead screw and countersunk external toothed lock washer assemblies
Standard published on 16.4.1988
Selected format:Cross recessed hexagon bolt with indentation and plain washer assemblies
Standard published on 16.4.1988
Selected format:Cross recessed hexagon bolt with indentation and single coil spring lock washer assemblies
Standard published on 16.4.1988
Selected format:Cross recessed hexagon bolt with indentationsingle coil lock washer and plain washer assemblies
Standard published on 16.4.1988
Selected format:Hexagon head bolt and single coil spring lock washer assemblies
Standard published on 16.4.1988
Selected format:Hexagon head bolt and serrated lock washer external teeth assemblies
Standard published on 16.4.1988
Selected format:Hexagon head boltsingle coil spring lock washer and plain washer assemblies
Standard published on 16.4.1988
Selected format:Latest update: 2026-10-08 (Number of items: 2 304 582)
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