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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
Test method of impermeable graphite materials—Part 10: Tensile strength
Standard published on 29.9.2024
Selected format:Test method of impermeable graphite materials—Part 11:Penetration coefficient
Standard published on 29.8.2025
Selected format:Test method of impermeable graphite materials—Part 12:Thermal conductivity
Standard published on 27.11.2023
Selected format:Test method of impermeable graphite materialsPart 2: Flexure strength
Standard published on 3.9.2014
Selected format:Test method of impermeable graphite materialsPart 3: Compressive strength
Standard published on 3.9.2014
Selected format:Test method of contraction of the impermeable graphite phenolic aldehyde agglomerant
Standard published on 29.4.2009
Selected format:Test method for hydraulic pressure bursting of impermeable graphite pipe
Standard published on 29.4.2009
Selected format:Test method of the rates of body weight gain and porefilling of impermeable graphite
Standard published on 29.4.2009
Selected format:Test method of the adhesion shear strength of impermeable graphite adhesion agent
Standard published on 29.4.2009
Selected format:Test method of the adhesion tensile strength of graphite impemeable adhesion agent
Standard published on 29.4.2009
Selected format:Latest update: 2026-04-02 (Number of items: 2 270 295)
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