Home / Standards / GB/T 21558-2025 GB/T 21558-2025 Upcoming Rigid polyurethane foam for building thermal insulation 建筑绝热用硬质聚氨酯泡沫塑料 Standard Type GBT ICS 83.100 CCS G32 Status 即将实施 Issue Date 2025-12-31 Implementation 2026-07-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A