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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
Internal combustion engines - Piston rings - Part 5: Inspection measuring principles
Standard published on 11.8.2008
Selected format:Internal combustion engines—Piston rings—Part 6: Scraper rings made of cast iron
Standard published on 9.3.2021
Selected format:Internal combustion engines - Piston rings - Part 7: Rectangular rings made of cast iron
Standard published on 10.11.2010
Selected format:Internal combustion engines—Piston rings—Part 8: Rectangular rings made of steel
Standard published on 12.10.2022
Selected format:Internal combustion engines - Piston rings - Part 9: Keystone rings made of cast iron
Standard published on 11.8.2008
Selected format:Dimensions of base for color picture tubes
Standard published on 30.12.2011
Selected format:Semiconductor devices—Integrated circuits—Part 21Sectional specification for film integrated circuits and hybrid film integrated circuits on the basis of the qualification approval procedures
Standard published on 28.12.2018
Selected format:Letter symbols for discrete semiconductor devices
Standard published on 5.11.2001
Selected format:Internal combustion engines - Cast iron wet cylinder liners - Specifications
Standard published on 10.11.2010
Selected format:Photography - Density Measurement - Part 2Geometric conditions for transmission density
Standard published on 18.6.2008
Selected format:Latest update: 2025-12-29 (Number of items: 2 253 390)
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