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Standards GB - Chinese national standards - Page 5700
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
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GB/T 12224-2005
WITHDRAWN
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General requirements for industrial steel valves
WITHDRAWN published on 19.9.2005
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GB/T 12225-1989
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General purpose industrial valves—Specification of copper alloy castings
WITHDRAWN published on 1.1.1990
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GB/T 12225-2005
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General purpose industrial valves—Specification of copper alloy castings
WITHDRAWN published on 19.9.2005
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GB 12225~12230-1989
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WITHDRAWN published on 1.1.1989
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GB/T 12226-1989
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General purpose industrial valves—Specification of flake graphite iron castings
WITHDRAWN published on 4.1.1990
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GB/T 12227-1989
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General purpose industrial valves—Specification of spheroidal graphite iron castings
WITHDRAWN published on 4.1.1990
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GB/T 12228-1989
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General purpose industrial valves—Specification of carbon steel forgings
WITHDRAWN published on 4.1.1990
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GB/T 12229-1989
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General purpose industrial valves—Specification of carbon steel castings
WITHDRAWN published on 4.1.1990
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GB/T 12230-1989
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General purpose industrial valves—Specification of austenitic steel castings
WITHDRAWN published on 4.1.1990
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GB/T 12230-2005
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General purpose industrial valves—Specification of stainless steel castings
WITHDRAWN published on 11.7.2005
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