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第一,应检查生产厂是否有钢筋生产许可证。国家从1987年开始对热轨变形螺纹钢筋实行了生产许可证制度,冶金部已对具备生产条件的231个企业发了许可证,编号为、XK05—012—XXX。第二、应检查产品质量证书数据是否符合标准规定,是否与实物相符。螺纹钢筋生产的现行标准规定了钢筋按屈服强度划分为Ⅱ级 RL335,Ⅲ级 PL400和 Ⅳ级RL540三个强度级别。目前大量使用的Ⅱ级钢筋,
First, it should be checked whether the production plant has a steel production license. Since 1987, the state has implemented a production permit system for deformed bar on hot rails, and the Ministry of Metallurgy has issued a permit for 231 companies with production conditions, and the serial number is XK05-012-XXX. Second, it should check whether the product quality certificate data meets the standards and whether it is in line with the actual material. The current standard for the production of rebar provides that the rebars are divided into two grades of strength grade II RL335, grade III PL400 and grade IV RL540 by yield strength. Currently widely used grade II steel,