Home / Standards / GB/T 8979-2025 GB/T 8979-2025 Active Pure nitrogen,high purity nitrogen and ultra pure nitrogen 纯氮、高纯氮和超纯氮 Standard Type GBT ICS 71.100.20 CCS G86 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A