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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
Measuring method for thermal conductivity of metal at high temperature
WITHDRAWN published on 2.5.1983
Selected format:Measuring method for thermal conductivity of metal at high temperature
WITHDRAWN published on 9.6.2008
Selected format:Method for tensile testing of metallic tubes at elevated temperature
WITHDRAWN published on 1.1.1983
Selected format:Methods for chemical analysis of ferroboron—The alkalimetric method for the determination of boron content
WITHDRAWN published on 30.12.1988
Selected format:Methods for chemical analysis of ferroboron—The perchloric acid dehydration-gravimetric method for the determination of silicon content
WITHDRAWN published on 20.9.1988
Selected format:Methods for chemical analysis of ferroboron The EDTA volumetric method for the determination of aluminium content
WITHDRAWN published on 20.9.1988
Selected format:Methods for chemical analysis of ferroniobium The EDTA volumetric method for the determination of aluminum content
WITHDRAWN published on 2.5.1983
Selected format:Methods for chemical analysis of ferroniobium—The neocuproine-chloroform extraction photometric method for the determination of copper content
WITHDRAWN published on 2.5.1983
Selected format:Methods for chemical analysis of ferroniobium The gravimetric method for the determination of silicon content
WITHDRAWN published on 2.5.1983
Selected format:Methods for chemical analysis of ferroniobium The combustion—iodate volumetric method for the determination of sulfur content
WITHDRAWN published on 2.5.1983
Selected format:Latest update: 2026-01-19 (Number of items: 2 257 233)
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