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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
Testing method for ash content of pattern materials in investment casting
WITHDRAWN published on 4.3.1993
Selected format:Testing method for linear contraction of pattern materials in investment casting
WITHDRAWN published on 4.3.1993
Selected format:Testing method for surface hardness of pattern materials in investment casting
WITHDRAWN published on 4.3.1993
Selected format:Testing method for acid number of pattern materials in investment casting
WITHDRAWN published on 4.3.1993
Selected format:Testing method for fluidity of pattern materials in investment casting
WITHDRAWN published on 4.3.1993
Selected format:Testing method for viscosity of pattern materials in investment casting
WITHDRAWN published on 4.3.1993
Selected format:Testing method for thermal stability of pattern materials in investment casting
WITHDRAWN published on 4.3.1993
Selected format:Specifications of equipement for video and pulse system of TV centre
WITHDRAWN published on 13.3.1993
Selected format:Manufacturer""s declaration of export product conformity with standards
WITHDRAWN published on 17.3.1993
Selected format:Electrical properties for line equipment used on cable carrier systems
WITHDRAWN published on 10.3.1993
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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