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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
Fire clay refractory bricks
WITHDRAWN published on 1.1.1984
Selected format:Fire clay refractory bricks for hot-blast stoves
WITHDRAWN published on 1.1.1987
Selected format:Fire clay refractory bricks for glass furnaces
WITHDRAWN published on 1.1.1987
Selected format:Fire clay refractory bricks for casting
WITHDRAWN published on 1.1.1984
Selected format:Dimensions of refractory bricks for casting
WITHDRAWN published on 1.1.1984
Selected format:-
WITHDRAWN published on 1.1.1964
Selected format:Fire clay refractory bricks for steel ladle linings
WITHDRAWN published on 1.1.1987
Selected format:Fire clay refractory bricks for ladle flow control systems
WITHDRAWN published on 1.1.1987
Selected format:Dimensions of refractory bricks for ladle flow control systems
WITHDRAWN published on 1.1.1984
Selected format:Wrought copper and copper alloys—Drawn rods and bars
WITHDRAWN published on 5.11.1992
Selected format:Latest update: 2025-12-18 (Number of items: 2 252 678)
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