1 U DC 621.643.2 – 034.14 : 620.197.6 – 036.742 : 628.1/.3 : 662.76 德国标准 1992 年10 月 钢管聚丙烯涂层 DIN 30 678 本标准由DIN（德国标准学会）和DVGW（德国天然气与水工程师协会）联合制定，并已被采纳为DVGW 有关天然气和水方面的标准。 尺寸单位为m m 目录 1 应用范围和领域···································1 2 概念·················································1 3 定名··················································1 4 要求··················································1 4.1 基材要求··········································1 4.2 涂层要求··········································1 4.2.1 最小厚度·······································1 4.2.2 连续性··········································2 4.2.3 粘合强度·······································2 4.2.4 冲击强度·······································2 4.2.5 压痕硬度·······································2 4.2.6 断裂时的百分延伸率·························2 4.2.7 涂层电阻率····································2 4.2.8 抗热老化性能··································2 5 测试···················································2 5.1 总则·················································2 5.2 检验文件···········································2 5.3 程序···········...
