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, a margin of not less than 6mm shall be reserved for the flanging. The flanging cannot cover the bolt hole. The undercut edge shall be chamfered or chamfered with scissors without cracking to form an arc flanging. If the four corners of the flanging are cracked, tin welding or sealant shall be used to fill it. When the thickness of the air duct plate is less than 1.2mm, joint angle or snap fit can be used to prevent air duct leakage. When the thickness is more 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 shall be riveted to the flange. The distance between the rivet and the air duct wall shall not be greater than 50mm, and the distance between the rivets 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㎡，中高压风管大北京纯水设备 保定网站制作 排水槽模具于1.0㎡时必须采取加固措施。
When the long side of rectangular air duct is greater than 630mm (insulation air duct is greater than 800mm), the size of the long side is greater than 1250mm, or the area of one side of low pressure air duct is greater than 1.2m2, and the area of medium and high pressure air duct is greater than 1.0m2, 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 round 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 m2, reinforcement measures must be taken.
风管边长≥630mm，L≥1250mm以上，不保温风管的加固框角铁可以比法兰角铁小1号。
The side length of air duct is ≥ 630mm, L ≥ 1250mm, and the angle iron of reinforcement frame of non thermal insulation air duct can be 1 size smaller than the angle iron of flange.