In the production of spiral duct, we want the most material correction, correction of the way of cold and hot two forms, we should pay attention to the manufacturing of spiral duct when the steel must be heated to 900 degrees above the thermal correction is guaranteed on the quality of product, and then in order to ensure the bearing capacity of spiral duct we are going to have, punching and cutting of steel, guarantee the hoop and the wind pipe arc arc, weld full support.

Second, when installing spiral tube, according to the standard height of spiral duct on spiral duct of some small sense of length, if it is to set the thread should not be too long and the end of the thread tray should not exceed the minimum.

Finally, the spiral air pipe installation, whether it is the wind pipe itself or the stent, should do a good job as if the insulation protection