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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
Iron ores—Sampling and sample preparation procedures
WITHDRAWN published on 24.6.2014
Selected format:Iron ores—Experimental methods for checking the precision of sampling
WITHDRAWN published on 5.6.2000
Selected format:Iron ores—Experimental methods for checking the bias of sampling
WITHDRAWN published on 5.6.2000
Selected format:Iron ores—Determination of moisture content of a consignment
WITHDRAWN published on 5.6.2000
Selected format:Iron ores—Determination of the moisture content of a lot
WITHDRAWN published on 13.12.2016
Selected format:Iron ore—Determination of decrepitation index
WITHDRAWN published on 24.3.2004
Selected format:Iron ore—Determination of size distribution by sieving
WITHDRAWN published on 24.3.2004
Selected format:Methods for chemical analysis of ferrochromium and silicochromium—The potentiometric titration method for the determination of chromium content
WITHDRAWN published on 30.12.1988
Selected format:Refractory products--Definitions of model
WITHDRAWN published on 1.1.1988
Selected format:Refractory products--Instructions on stacking, sampling, acceptance, storage and transporting
WITHDRAWN published on 1.1.1988
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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