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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
Seamless stainless steel tubes for structure
Standard published on 29.8.2025
Selected format:Seamless stainless steel pipes for fluid transport
Standard published on 1.8.2025
Selected format:General requirement for surface condition of hot-rolled steel sheet and plate
Standard published on 29.8.2025
Selected format:Eutectic carbide of steel--Micrographic method using standard diagrams
Standard published on 5.4.1994
Selected format:Eutectic carbide of steel—Micrographic method using standard diagrams
Standard published on 13.6.1994
Selected format:Dimensionshapemass and tolerance for hot-rolled round wire rod
Standard published on 15.7.2009
Selected format:Fireclay refractory mortars
Standard published on 30.10.2008
Selected format:Refractory products - Determination of alkali-resistance
Standard published on 3.6.2008
Selected format:Ferroalloys - Vocabulary - Part 1: Materials
Standard published on 2.9.2010
Selected format:Ferroalloys - Vocabulary - Part 2: Sampling and sample preparation
Standard published on 2.9.2010
Selected format:Latest update: 2026-04-21 (Number of items: 2 274 412)
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