风管直径 D或边长尺寸b 圆形风管
低中压系统(空调) 高压系统(排烟)
D(b)≤320 0.5mm 0.5mm 0.75mm
320<D(b)≤450 0.6mm 0.6mm 0.75mm
450<D(b)≤630 0.75mm 0.6mm 0.75mm
630<D(b)≤1000 0.75mm 0.75mm 1.0mm
1000<D(b)≤1250 1.0mm 1.0mm 1.0mm
1250<D(b)≤2000 1.2mm 1.0mm 1.2mm
2000<D(b)≤4000 1.2mm 1.2mm 1.2mm
国家风管厚度使用标准
矩形风管