Home / Standards / GB/T 46219-2025 GB/T 46219-2025 Active Corrosion-resistant alloy U-bent tubes 耐蚀合金U形管 Standard Type GBT ICS 77.140.75 CCS H59 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A