一次成型,代替了原来的卷筒成型具有寿命长、抗疲劳、低成本、抗压的优点,大口径达到1.2米公称外径(mm)公称内径(DN/mm)内径寸(Inch)外径公差(mm)壁厚公差(mm)标准管壁厚(mm)风管壁厚(mm)标准管KG/M风管KG/M备注Φ20160.4±0.3-0.32.80.166???????壁?厚?可?定Φ25200.6±0.3-0.330.217Φ32251±0.3-0.33.50.324Φ40321.2±0.3-0.33.80.439Φ63502±0.4-0.450.911Φ75632.5±0.4-0.45.51.194Φ90753±0.5-0.45.841.511Φ110903.5±0.5-0.4641.91 |