风管加工
Air duct processing
根据风管长边尺寸进行合适的选料。按正确的放样进行制作。
Select appropriate materials according to the size of the long side of the air duct. Make according to the correct setting out.
风管翻边时，翻边应留有不小于6mm的余量，翻边不能遮住螺栓孔，咬口边要用剪刀进行倒角或开角，且不开裂，形成弧形翻边。若翻边四角开裂，应采用锡焊或密封胶填补，防止风管漏风风管板材厚度小于1.2mm时可以采用联合角或按扣式咬口，大于1.2mm时采用焊接。
When flanging the air duct, an allowance of not less than 6mm shall be reserved for flanging, and the flanging shall not cover the bolt hole. The undercut edge shall be chamfered or angled with scissors without cracking, forming an arc flanging. If the four corners of the flanging crack, tin welding or sealant shall be used to prevent air leakage of the air duct. When the thickness of the air duct plate is less than 1.2mm, the joint angle or snap bite can be used, and when it is greater than 1.2mm, welding can be used.
风管成型后与法兰连接采用铆接，铆钉距风管壁距离不得大于50mm，各铆钉间距不得大于150mm。
After the air duct is formed, it is connected with the flange by riveting. The distance between the rivet and the air duct wall shall not be greater than 50mm, and the spacing of each rivet shall not be greater than 150mm.
矩形风管长边大于630mm（保温风管大于800mm），长边尺寸大于1250mm或低压风管单边面积大于1.2㎡，中高压风管大于1.0㎡时河北立体车库 消防报警器塑料配件 电缆接地箱 电缆保护接地箱 塑料土工格栅 消弧线圈装置 必须采取加固措施。
When the long side of rectangular air duct is greater than 630mm (insulation air duct is greater than 800mm), the long side size is greater than 1250mm, or the unilateral area of low-pressure air duct is greater than 1.2 m2, and the medium and high-pressure air duct is greater than 1.0 m2, reinforcement measures must be taken.
圆形风管（不包括螺旋风管）直径≥800mm，且其管段长度大于1250mm或总表面积大于4㎡时必须采取加固措施。
When the diameter of circular air duct (excluding spiral air duct) is ≥ 800mm, and the length of its pipe section is greater than 1250mm or the total surface area is greater than 4 ㎡, reinforcement measures must be taken.