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Standards GB - Chinese national standards - Page 5581
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 12144-2000
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Terbium oxide
WITHDRAWN published on 5.6.2000
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GB 12145-1989
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WITHDRAWN published on 1.1.1989
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GB/T 12145-1999
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Quality criterion of water and steam for generating unit and steam power equipment
WITHDRAWN published on 23.3.1999
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GB/T 12145-2008
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Quality criterion of water and steam for generating unit and steam power equipment
WITHDRAWN published on 24.9.2008
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GB/T 12146-1989
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Analysis of water used in boiler and cooling system—Determination of ammonia—Phenol method
WITHDRAWN published on 29.12.1989
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GB/T 12147-1989
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Analysis of water used in boiler and cooling system--Determination of electrical conductivity of pure water
WITHDRAWN published on 29.12.1989
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GB/T 12148-1989
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Analysis ofwater used in boiler and cooling system--Determination of total silicon--Photometric method by conversion with hydrofluoric acid for low silicon
WITHDRAWN published on 29.12.1989
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GB/T 12149-1989
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Analysis of water used in boiler and cooling system--Determination of silica--Molybdenum blue color-imetry
WITHDRAWN published on 29.12.1989
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GB/T 12149-2007
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Water for industrial circulating cooling system and boiler—Determination of silica
WITHDRAWN published on 13.8.2007
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GB 1215-1987
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WITHDRAWN published on 1.1.1987
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