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Standards GB - Chinese national standards - Page 112
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 11351-2017
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Mass tolerances of casting
Standard published on 1.11.2017
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GB/T 11352-2009
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Carbon steel castings for general engineering purpose
Standard published on 5.3.2009
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GB/T 11354-2025
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Determination of nitriding hardness depth and metallographic examination for steel
Standard published on 29.8.2025
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GB/T 11355-2025
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V-belt and V-ribbed belt drives—Calculation of power ratings
Standard published on 31.10.2025
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GB/T 11356.1-2008
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Belt drives—Pulleys for V-belts (system based on datum width)—Geometrical inspection of grooves
Standard published on 16.4.2008
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GB/T 11356.1-2026
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Belt drives—Geometrical inspection of grooves for classical and narrow V-Pulleys—Part 1System based on datum width
Execute Date: march 2027
Standard published on 28.8.2026
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GB/T 11356.2-2023
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Belt drives—Geometrical inspection of grooves for classical and narrow V-Pulleys—Part 2System based on effective width
Standard published on 27.11.2023
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GB/T 11357-2020
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Quality, roughness and balance of transmission pulleys
Standard published on 28.4.2020
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GB/T 11358-1999
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Belt drives--Flat transmission belts and corresponding pulleys--Dimensions and tolerances
Standard published on 3.9.1999
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GB/T 11361-2018
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Synchronous belt drives—Trapezoidal toothed pulleys with pitch code MXL,XXL,XL,L,H,XH and XXH
Standard published on 28.12.2018
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