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Standards GB - Chinese national standards - Page 5143
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 6907-2022
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Analysis of water used in boiler and cooling system—Sampling method of water
Standard published on 9.3.2022
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GB/T 6908-2018
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Analysis of water used in boiler and cooling system—Determination of electrical conductivity
Standard published on 7.6.2018
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GB/T 6909-2018
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Analysis of water used in boiler and cooling system—Determination of hardness
Standard published on 7.6.2018
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GB/T 691-2012
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Chemical reagent - Aniline
Standard published on 31.12.2012
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GB/T 6910-2006
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Methods for analysis of water for boiler and for cooling determination of calcium-complexometric titration
Standard published on 6.3.2006
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GB/T 6910-2026
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Analysis methods for boiler water and cooling water—Determination of calcium—Complexometric titration
Execute Date: november 2026
Standard published on 30.4.2026
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GB/T 6911-2017
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Determination of sulfate in water for industrial circulating cooling system and boiler
Standard published on 7.9.2017
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GB/T 6912-2008
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Analysis of water used in boiler and cooling system - Determination of nitrite
Standard published on 1.4.2008
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GB/T 6912.1-2006
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Methods for analysis of water for boiler and for cooling determination of nitrates and nitrites - Part 1: Ultraviolet spectrophotometry for nitrates
Standard published on 1.9.2006
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GB/T 6913-2023
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Analysis of water used in boiler and cooling system—Determination of phosphate
Standard published on 17.3.2023
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