Table1DuctworkClassificationandAirLeakageLimits(标准DW14414页)DuctpressureclassStaticpressurelimitMaximumairDuctpressureclassvelocity(m/s)AirleakagelimitslitrespersecondpersquaremetreofductsurfaceareaPositive(Pa)Negative(Pa)Low-pressure–ClassA500500100.027xp0.65Medium-pressure–ClassB1000750200.009xp0.65High-pressure–ClassC200750400.003xp0.65中华人民共和国行业标准通风管道施工技术规程(51页)JGJ141-2004J363-2004表5.2.10-3圆形风管允许漏风量压力(Pa)允许漏风量[m3/(h.m2)低压系统风管(P≤500Pa)≤0.0528p0.65中压系统风管(500<P≤1500Pa)≤0.0176p0.65高压系统风管(1500<P≤3000Pa)≤0.0117p0.65