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Standards GB - Chinese national standards - Page 5701
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 12231-1989
WITHDRAWN
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WITHDRAWN published on 1.1.1989
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GB/T 12232-1989
WITHDRAWN
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General purpose industrial valves—Flanged iron gate valves
WITHDRAWN published on 4.1.1990
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GB/T 12233-1989
WITHDRAWN
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General purpose industrial valves—Casting iron globe valves and lift check valves
WITHDRAWN published on 4.1.1990
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GB/T 12234-1989
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General purpose industrial valves—Flanged and butt-weld steel gate valves
WITHDRAWN published on 4.1.1990
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GB/T 12234-2007
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Bolted bonnet steel gate valves for petroleum and natural gas industries
WITHDRAWN published on 18.4.2007
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GB/T 12235-1989
WITHDRAWN
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General purpose industrial valves—Flanged steel globe valves and lift check valves
WITHDRAWN published on 4.1.1990
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GB/T 12236-1989
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General purpose industrial valves—Steel swing check valves
WITHDRAWN published on 4.1.1990
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GB/T 12237-1989
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General purpose industrial valves—Flanged and butt-weld end steel ball valves
WITHDRAWN published on 4.1.1990
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GB/T 12237-2007
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Steel ball valves for petroleum,petrochemical and allied industries
WITHDRAWN published on 18.4.2007
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GB/T 12238-1989
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General purpose industrial valves—Flanged and wafer butterfly valves
WITHDRAWN published on 4.1.1990
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