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Standards GB - Chinese national standards - Page 6636
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 1853-1980
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Pg6 flanged cast steel stop check valve for marine use
WITHDRAWN published on 1.1.1980
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GB/T 1853-1994
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Marine flanged cast steel over board stop check valve
WITHDRAWN published on 30.6.1994
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GB 18530-2001
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Occupatonal exposure limit for carbon fiber dust in the air of workplace
WITHDRAWN published on 4.12.2001
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GB 18531-2001
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Occupatonal exposure limit for phosphoric acid in the air of workplace
WITHDRAWN published on 4.12.2001
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GB 18532-2001
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Occupatonal exposure limit for polyacrylonitrile fiber dust in the air of workplace
WITHDRAWN published on 4.12.2001
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GB 18533-2001
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Occupatonal exposure limit for polymethylene polyphenyl isocyanate (PMPPI) in the air of workplace
WITHDRAWN published on 4.12.2001
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GB 18534-2001
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Occupatonal exposure limit for methyl ethyl ketone in the air of workplace
WITHDRAWN published on 4.12.2001
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GB 18535-2001
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Occupatonal exposure limit for bentonite dust in the air of workplace
WITHDRAWN published on 4.12.2001
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GB 18536-2001
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Occupatonal exposure limit for phosphorous oxychloride in the air of workplace
WITHDRAWN published on 4.12.2001
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GB 18537-2001
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Occupatonal exposure limit for maleic anhydride in the air of workplace
WITHDRAWN published on 4.12.2001
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