The National Standards Committee approved the issuance of 4 national standards for refractory materials
【Summary】:
Announcement No. 6 of 2018 of the National Standardization Administration Committee approved 389 national standards, including 4 national standards for refractory materials. The specific standard names are as follows: 1) GB/T7320-2018 "Test Method for Thermal Expansion of Refractories": This standard specifies the definition, principles, equipment, samples, test procedures, calculation of results, test errors and test reports for the determination of thermal expansion of refractories. This standard applies to the determination of the linear expansion rate, average linear expansion coefficient and instantaneous linear expansion coefficient of refractory materials. This standard contains the following two thermal expansion test methods: the differential method and the ejector method.
Announcement No. 6 of 2018 of the National Standardization Administration Committee approved 389 national standards, including 4 national standards for refractory materials. The specific standard names are as follows:
1) GB/T 7320-2018 "Test Method for Thermal Expansion of Refractories": This standard specifies the definition, principles, equipment, samples, test procedures, calculation of results, test errors and test reports for the determination of thermal expansion of refractories. This standard applies to the determination of the linear expansion rate, average linear expansion coefficient and instantaneous linear expansion coefficient of refractory materials. This standard contains the following two thermal expansion test methods: the differential method and the ejector method. Replace standard GB/T 7320-2008, implementation date 2019-04-01.
2) GB/T 17911-2018 "Test Methods for Refractory Fiber Products": This standard specifies the test methods for the thickness, bulk density, resilience, permanent heating line changes, thermal conductivity, tensile strength and slag ball content of refractory fiber products. This standard applies to refractory fiber cotton, blankets, felts, woven fabrics, boards, paper and preformed products, and does not apply to products delivered in a wet state. Replace standard GB/T 17911-2006, implementation date 2019-04-01.
3) GB/T 36133-2018 "Test Method for Thermal Conductivity of Refractory Materials (Platinum Resistance Thermometer Method)": This standard specifies the principle, equipment, samples, installation, test procedures, and results of the platinum resistance thermometer method for determining the thermal conductivity of refractory materials Calculation and test report. This standard applies to the determination of the thermal conductivity of refractory materials that do not contain carbon, are non-conductive, and have a thermal conductivity of not more than 15 W/(m·K). Implementation date 2019-04-01.
4) GB/T 36134-2018 "Test Method for Bursting Resistance of Unshaped Refractories": This standard specifies the terms and definitions, principles, equipment, samples, test procedures and test reports of the test methods for bursting resistance of Unshaped Refractories . This standard applies to the determination of the burst resistance of unshaped refractories. Implementation date 2019-04-01.
