Home / Standards / GB/T 20974-2025 GB/T 20974-2025 Upcoming Rigid phenolic foam for thermal insulation(PF) 绝热用硬质酚醛泡沫制品(PF) Standard Type GBT ICS 91.120.10 CCS Q 25 Status 即将实施 Issue Date 2025-12-31 Implementation 2026-07-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A