风管材质要求
Duct material requirements
1、各种安装材料应具有出厂合格证明书或质量鉴定文件及产品清单。
1. All kinds of installation materials shall be provided with factory certificate, quality appraisal document and product list.
2、风管成品不允许有变形、扭曲、开裂、孔洞、法兰脱落、漏铆、漏打螺栓孔等缺陷：
2. The finished air duct shall be free of deformation, distortion, cracking, holes, flange falling off, missing riveting, missing bolt holes and other defects:
3、安装的阀体、风口等部件应检查调节装置是否灵活，消声片、油漆层有无损伤。
3. The installed valve body, air vent and other components shall be checked to see whether the regulating device is flexible and whether the muffler and paint layer are damaged.
4、安装使用的材料：螺栓、螺母、垫圈、垫料、密封条、自攻螺钉，拉铆钉，焊条、各种帆布、无纺布、射钉、膨胀螺栓应符合产品质量要求。
4. Materials used for installation: bolts, nuts, washers, cushions, sealing strips, self tapping screws, rivets, welding rods, various canvas, non-woven fabrics, studs, expansion bolts shall meet the product quality requirements.
Duct material requirements
1、各种安装材料应具有出厂合格证明书或质量鉴定文件及产品清单。
1. All kinds of installation materials shall be provided with factory certificate, quality appraisal document and product list.
2、风管成品不允许有变形、扭曲、开裂、孔洞、法兰脱落、漏铆、漏打螺栓孔等缺陷：
2. The finished air duct shall be free of deformation, distortion, cracking, holes, flange falling off, missing riveting, missing bolt holes and other defects:
3、安装的阀体、风口等部件应检查调节装置是否灵活，消声片、油漆层有无损伤。
3. The installed valve body, air vent and other components shall be checked to see whether the regulating device is flexible and whether the muffler and paint layer are damaged.
4、安装使用的材料：螺栓、螺母、垫圈、垫料、密封条、自攻螺钉，拉铆钉，焊条、各种帆布、无纺布、射钉、膨胀螺栓应符合产品质量要求。
4. Materials used for installation: bolts, nuts, washers, cushions, sealing strips, self tapping screws, rivets, welding rods, various canvas, non-woven fabrics, studs, expansion bolts shall meet the product quality requirements.
