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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
Anodic oxide coatings and organic polymer coatings on aluminium and its alloys—Part 4: Texture coatings
Standard published on 20.8.2021
Selected format:Anodic oxide coatings and organic polymer coatings on aluminium and its alloys—Part 5: Function coatings
Standard published on 20.8.2021
Selected format:Anodizing of aluminium and its alloys-The measuring method of thickness of anodic oxide coatings Part 1:The measuring principle
Standard published on 4.7.2005
Selected format:Anodizing of aluminium and its alloys-The measuring method of thickness of anodic oxide coatings Part2:Mass-loss method
Standard published on 4.7.2005
Selected format:Anodizing of aluminium and its alloys-The measuring method of thickness of anodic oxide coatings Part 3:Split-beam microscope method
Standard published on 4.7.2005
Selected format:Test methods for thickness of anodic oxidation coatings on aluminium and aluminium alloys--Gravimetric method
Standard published on 26.6.1987
Selected format:Test methods for thickness of anodic oxidation coatin-gs on aluminium and aluminium alloys--Split-beam mic-roscope method
Standard published on 26.6.1987
Selected format:Marine echo-sounding equipment
Standard published on 23.3.2009
Selected format:Standard test method for vapor pressure of petroleum products (Reid Method)
Standard published on 5.11.2012
Selected format:Determination of oxidation stability of gasoline—Induction period method
Standard published on 31.12.2015
Selected format:Latest update: 2026-05-02 (Number of items: 2 275 366)
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