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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 - Male
Standard published on 7.5.2008
Selected format:Flared couplings - Male long
Standard published on 7.5.2008
Selected format:Flared couplings - Union
Standard published on 7.5.2008
Selected format:Flared couplings - Male elbow
Standard published on 7.5.2008
Selected format:Flared couplings - Union elbow
Standard published on 7.5.2008
Selected format:Flared couplings - Straight thread elbow
Standard published on 7.5.2008
Selected format:Flared couplings - Swivel elbow
Standard published on 7.5.2008
Selected format:Flared couplings - Straight thread branch tee
Standard published on 7.5.2008
Selected format:Flared couplings - Swivel run tee
Standard published on 7.5.2008
Selected format:Flared couplings - Male branch tee
Standard published on 7.5.2008
Selected format:Latest update: 2026-06-26 (Number of items: 2 284 409)
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