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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
Mechanical draft cooling towers—Part 1Medium and small open cooling towers
Standard published on 28.12.2018
Selected format:Mechanical draft cooling towers—Part 1:Medium and small open cooling towers
Standard published on 28.12.2018
Selected format:Mechanical draft cooling towers—Part 2Large open cooling towers
Standard published on 28.12.2018
Selected format:Mechanical draft cooling towers—Part 2:Large open cooling towers
Standard published on 28.12.2018
Selected format:Mechanical draft cooling towers—Part 3Closed circuit cooling towers
Standard published on 30.8.2019
Selected format:Mechanical draft cooling towers—Part 3:Closed circuit cooling towers
Standard published on 30.8.2019
Selected format:Test methods for unsaturated polyester resins
Standard published on 30.6.2008
Selected format:Methods of test for the determination of ionic impurities in electrical insulating materials by extraction with liquids
Standard published on 31.12.2012
Selected format:Slotted set screws with cone point
Standard published on 24.6.1988
Selected format:Fixed capacitors for use in electronic equipment--Part 15:Sectional specification--Fixed tantalum capacitors with non-solid or solid electrolyte
Standard published on 24.11.2003
Selected format:Latest update: 2026-08-21 (Number of items: 2 298 377)
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