Galvanized rectangular air duct manufacture features:*Annual processing capacity of 20.000 tons (200,000 m^2)*Six Fully Automated Duct Line with CNC plasma cutters*Computer typeset cutting for High Precision Low wastage*Quality: our ducts are certified by CNAS Quality AccreditationTDF Duct Accessories: The connect flange is formed from the same sheet as of the duct to avoid and joint between the duct and flange.TDC Connection System:A separate flange is assembled and installed onto the ductwork.辰风风管优势：①按客户图纸提供专业解图、计价、加工、配送的一站式服务。②采用美国专业软件实现最优排版，最大限度降低损耗。③按实际开料面积计算价格，节省工程总成本10%以上。④先进的美国风管自动下料生产线，法兰成型机、压筋机、折弯机、咬口机、等离子切割机等十余台风管加工设备。⑤自主配套生产共板式法兰角，TDC德国法兰角码，德国法兰条，卡码，C型插条等。⑥在广州、东莞、天津均设生产基地，业务覆盖华南与华北地区。⑦我司已获得中国合格评定国家认可委员会（CNAS）颁发的质量认可证书及ISO9001:管理证书。我们产品特点：①在保证良好密闭性的前提下，现场安装更加方便快捷。②省时省料，外观简洁，经济耐用。③性价比高，风管的综合单价=材料单价+加工费。风管加工费：名称规格（毫米）单价(元/平方)直管0.8-1.230.7-0.7540.5-0.65异型管0.8-1.290.7-0.75100.5-0.611例如：1.0mm的镀锌板单价是40.5元/平方；加工成风管：直管综合单价：40.5+3=43.5元/平方； 异型管综合单价：40.5+9=49.5元/平方.（更多产品信息欢迎联系我司:袁先生 15118253305）参考图片：工地图片：