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Standards GB - Chinese national standards - Page 5270
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 8654.6-1988
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Methods for chemical analysis of manganese metal--The diamine hydrochloride-iodo-metric method for the determination of selenium content
Standard published on 5.2.1988
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GB/T 8655-2019
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Styrene-butadiene rubber (SBR)15001502
Standard published on 25.3.2019
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GB/T 8656-2018
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Emulsion-and solution-polymerized styrene-butadiene rubber(SBR)—Evaluation procedures
Standard published on 28.12.2018
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GB/T 8657-2014
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Styrene-butadiene rubber, rawDetermination of soap and organic-acid content
Standard published on 8.7.2014
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GB/T 8658-2025
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Rubber, raw styrene-butadiene, emulsion-polymerized—Determination of bound styrene content—Refractive index method
Standard published on 29.8.2025
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GB/T 8659-2018
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Butadiene rubber(BR)9000
Standard published on 28.12.2018
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GB/T 866-1986
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Oval countersunk head rivets--Black
Standard published on 2.7.1986
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GB/T 8660-2018
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Solution polymerized butadiene rubber(BR)—Evaluation procedures
Standard published on 28.12.2018
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GB/T 8661-2008
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Plastics - Styrene/acrylonitrile copolymers - Determination of residual acrylonitrile monomer content - Gas chromatography method
Standard published on 19.6.2008
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GB 8662-2006
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Fitting dimension between scalpel blades and handles
Standard published on 14.9.2006
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