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The National Standard Committee approved the release of 4 national standards for refractory materials
Release time:
2021-11-12
Announcement No. 6 of 2018 of the National Standardization Management 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 Refractory Materials": This standard specifies the definition, principle, equipment, specimens, test steps, result calculation, test error and test report of thermal expansion determination of refractory materials. This standard is applicable to the determination of linear expansion rate, average linear expansion coefficient and instantaneous linear expansion coefficient of refractory materials. This standard includes the following two thermal expansion test methods: differential method and push rod method.
Announcement No. 6 of 2018 of the National Standardization Management Committee approved 389 national standards, including 4 national standards for refractory materials. Specific standard names are as follows:
1)GB/T 7320-2018 "thermal expansion test method for refractory materials": this standard specifies the definition, principle, equipment, specimen, test procedure, result calculation, test error and test report of thermal expansion determination of refractory materials. This standard is applicable to the determination of linear expansion rate, average linear expansion coefficient and instantaneous linear expansion coefficient of refractory materials. This standard includes the following two thermal expansion test methods: differential method and push rod method. Replaced 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 thickness, bulk density, resilience, permanent heating line change, thermal conductivity, tensile strength and slag ball content of refractory fiber products. This standard applies to refractory fiber cotton, blankets, felts, braids, boards, papers and preformed products, but not to products delivered in a wet state. Replaced 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 steps, result calculation and test report of platinum resistance thermometer method for determining thermal conductivity of refractory materials. This standard is applicable to the determination of thermal conductivity of refractory materials containing no carbon, no electrical conductivity and thermal conductivity not greater than 15W/(m · K). Implementation Date 2019-04-01.
4)GB/T 36134-2018 "Test Method for Burst Resistance of Unshaped Refractories": This standard specifies the terms and definitions, principles, equipment, specimens, test procedures and test reports of the test method for burst resistance of unshaped refractories. This standard is applicable to the determination of the burst resistance of monolithic refractories. Implementation Date 2019-04-01.
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