Home / Standards / GB/T 21447-2008 GB/T 21447-2008 Abolished Specification for external corrosion control for steel pipeline 钢质管道外腐蚀控制规范 Standard Type GBT ICS 75.200 CCS E98 Status 废止 Issue Date 2008-02-13 Implementation 2008-08-01 Responsible Dept 国家标准委 Drafting Unit N/A