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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
Press brake—Testing of the accuracy
WITHDRAWN published on 3.5.1993
Selected format:Stub parallel shank twist drills
WITHDRAWN published on 1.1.1985
Selected format:Chemical analysis methods for zircon refractories
WITHDRAWN published on 13.5.1993
Selected format:Chemical analysis methods for fuse cast alumina refractories
WITHDRAWN published on 13.5.1993
Selected format:Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of tungsten content—Potassium thiocynate photometric method
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of arsenic content—Silver diethyl-dithiocarbamate photometric method
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of tungsten ores and molybdenum ores - Part 10Determination of arsenic content
WITHDRAWN published on 10.11.2010
Selected format:Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of bismuth content—Flame atomic absorption spectrometric method
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of silver content—Flame atomic absorption spectrometric method after metyl iso-butyl ketone extraction
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of tin content—Polarographic method in hydrochloric acid-ammoninm chloride medium
WITHDRAWN published on 12.5.1993
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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