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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
General test method in salt industry—Determination of calcium and magnesium ions
WITHDRAWN published on 3.7.1991
Selected format:General test method in salt industry—Determination of iodide ion
WITHDRAWN published on 28.5.1999
Selected format:General test method in salt industry—Determination of sulfate ion
WITHDRAWN published on 3.7.1991
Selected format:General test method in salt industry—Determination of lead ion (photometry)
WITHDRAWN published on 3.7.1991
Selected format:Oil impregnated paper capacitance graded wall bushings—Types and dimensions
WITHDRAWN published on 15.7.1991
Selected format:Types and dimensions of a.c. capacitance graded bushings
WITHDRAWN published on 30.6.2008
Selected format:Oil impregnated paper capacitance graded transformer bushings—Types and dimensions
WITHDRAWN published on 15.7.1991
Selected format:Isolating transformers and safety isolating transformers Requirements
WITHDRAWN published on 15.7.1991
Selected format:Choice and installation of cables for low-voltage power systems in ships
WITHDRAWN published on 15.7.1991
Selected format:Choice and installation of shipboard flexible coaxial cables
WITHDRAWN published on 15.7.1991
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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