Home / Standards / GB/T 33791-2025 GB/T 33791-2025 Upcoming Technical specification for cathodic protection of steel well casings 钢质井套管阴极保护技术规范 Standard Type GBT ICS 25.220.99 CCS A 29 Status 即将实施 Issue Date 2025-12-02 Implementation 2026-07-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A