Home / Standards / GB/T 33378-2025 GB/T 33378-2025 Active Techincal specification of cathodic protection 阴极保护技术条件 Standard Type GBT ICS 25.220.99 CCS A 29 Status 现行 Issue Date 2025-10-31 Implementation 2026-05-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A