Home / Standards / GB/T 23257-2017 GB/T 23257-2017 Active Polyethylene coating for buried steel pipeline 埋地钢质管道聚乙烯防腐层 Standard Type GBT ICS 75.200 CCS E98 Status 现行 Issue Date 2017-05-12 Implementation 2017-12-01 Responsible Dept 国家标准委 Drafting Unit N/A