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Standards GB - Chinese national standards - Page 8568
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 7317-1987
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Test method for hot rupture bonding strength of refractory mortar
WITHDRAWN published on 1.1.1987
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GB 7318-1987
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Test method for sieve analysis of refractory mortar
WITHDRAWN published on 1.1.1987
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GB 7319-1987
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Test method for coefficient of linear change of refractory mortar
WITHDRAWN published on 1.1.1987
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GB/T 732-1987
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Gunnybags—Grading stipulation
WITHDRAWN published on 19.11.1987
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GB/T 7320-1987
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Test method for thermal expansion of refractory products
WITHDRAWN published on 3.2.1987
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GB/T 7320-2008
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Refractories—Determination of thermal expansion
WITHDRAWN published on 3.6.2008
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GB/T 7320.1-2000
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Refractory materials—Determination of thermal expansion—Push rod method
WITHDRAWN published on 17.11.2000
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GB/T 7320.2-2000
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Refractory materials—Determination of thermal expansion(Telescope method)
WITHDRAWN published on 17.11.2000
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GB/T 7321-1987
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Rule of preparing sample for tests of dense shaped refractory products
WITHDRAWN published on 27.2.1987
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GB/T 7321-2004
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Sample preparation for testing of shaped refractory products
WITHDRAWN published on 19.1.2004
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