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Standards GB - Chinese national standards - Page 123
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
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GB/T 1149.12-2023
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Internal combustion engines—Piston rings—Part 12: Half keystone rings made of steel
Standard published on 28.12.2023
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GB/T 1149.13-2008
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Internal combustion engines - Piston rings - Part 13: Oil control rings
Standard published on 11.8.2008
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GB/T 1149.14-2008
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Internal combustion engines - Piston rings - Part 14: Coil-spring-loaded oil control rings
Standard published on 11.8.2008
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GB/T 1149.15-2017
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Internal combustion engines—Piston rings—Part 15: Coil-spring-loaded oil control rings of narrow width made of cast iron
Standard published on 12.7.2017
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GB/T 1149.16-2015
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Internal combustion engines—Piston rings—Part 16: Expander/segment oil-control rings
Standard published on 10.12.2015
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GB/T 1149.17-2023
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Internal combustion engines—Piston rings—Part 17:Coil-spring-loaded oil control rings made of steel
Standard published on 28.12.2023
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GB/T 1149.2-2010
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Internal combustion engines - Piston rings - Part 2: Vocabulary
Standard published on 10.11.2010
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GB/T 1149.3-2010
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Internal combustion engines - Piston rings - Part 3: Material specifications
Standard published on 10.11.2010
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GB/T 1149.3-2010/ISO 6621 3:2000
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Standard published on 10.11.2010
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GB/T 1149.4-2021
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Internal combustion engines—Piston rings—Part 4:Quality requirements
Standard published on 9.3.2021
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