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GB/T 30870-2014: Classification of special dense shaped refractory products Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 30870-2014: Classification of special dense shaped refractory products---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT30870-2014GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 81.080 Q 40 GB/T 30870-2014 / ISO 10081-4.2007 Classification of special dense shaped refractory products (ISO 10081-4.2007, Classification of dense shaped refractory products - Part 4. Special products, IDT) Issued on: JULY 24, 2014 Implemented on: FEBRUARY 1, 2015 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee. Table of ContentsForeword ... 3 1 Scope ... 4 2 Classification principle ... 4 3 Classification ... 4 4 Other refractory products... 12 5 Designation of a special product ... 12ForewordThis Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard uses translation method and identically adopts ISO 10081- 4.2007 Classification of dense shaped refractory products - Part 4. Special products. This Standard makes following editorial modification. - deleted Bibliography. This Standard was proposed by and shall be under the jurisdiction of National Technical Committee on Refractory materials of Standardization Administration of China (SAC/TC 193). The drafting organizations of this Standard. Metallurgical Industry Information Standards Institute, Sinosteel Luoyang Refractories Research Institute Co., Ltd., Ruitai Technology Co., Ltd., Zhejiang Zili Company Limited. Main drafters of this Standard. Qiu Jinhui, Gao Jianping, Yuan Lin, Peng Xigao, Wang Jiangwei, Cheng Jie, Wang Xiaoli, Zhao Yi. Classification of special dense shaped refractory products1 ScopeThis Standard specifies the classification and designation of dense shaped refractory products of special composition including oxide products, oxide and non-oxide products, non-oxide silicon carbide or carbon-based products, and further special products which are only designated but not classified, for example, non-oxide products, such as boride, nitride or further combinations of the series listed above.2 Classification principleDense shaped special products shall be classified according to the following six criteria. a) the type of product; b) the group determined by the content of its main chemical component(s); c) the principal raw material(s); d) the state of the raw materials; e) the nature of the bond; f) any post-treatment;3 Classification3.1 Type of product The following types of dense shaped refractory special products shall be classified by chemical analysis as shown in 3.2. a) alumina-chromia (ACr); b) chromia (Cr); c) alumina-chromia-zirconia (ACrZ); designation of dense shaped refractory products of the mentioned series. EXAMPLES Some examples of designations are as follows. ‐ alumina-chromia products in the group ACr70/5, based on synthetic sintered corundum and chromia with an oxide ceramic bond; ‐ alumina-zirconia-silica products of the group AZS15, based on synthetic sintered corundum and naturally occurring zircon with an oxide ceramic bond; ‐ alumina-carbon products with antioxidant additives of the group AC80/5A, based on naturally occurring sintered bauxite with an organic chemical bond, with tempering; ‐ silicon carbide products of the group SiC70, based on synthetic silicon carbide with silicon nitride bond; ‐ carbon product of the group C60, based on synthetic graphite with an organic chemical bond formed at higher temperatures. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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