Home / Standards / GB/T 17456.1-2009 GB/T 17456.1-2009 Abolished Ductile iron pipes - External zinc-based coating - Part 1: Metallic zinc with finishing layer 球墨铸铁管外表面锌涂层 第1部分：带终饰层的金属锌涂层 Standard Type GBT ICS 23.040.10 CCS H48 Status 废止 Issue Date 2009-10-30 Implementation 2010-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A