In this regard the flange, and today we will continue to understand their knowledge of content, because we have needs in this area. Moreover, it is also associated with the Website, so we need to learn and understand, so that the site can be more familiar with the product, but also to make their know more expertise in this regard flange. The following content will be step by step, which is more structured, so that everyone can learn them more easily. 1 flange connection flange connection, it is mainly used for cast iron pipes, rubber lined pipe and the connection of non-ferrous metal pipe, it can be said that it is important to connect the pipeline construction methods. If it is low voltage small diameter, then you can use silk flange, if it is a large diameter high pressure and low pressure, you should use the welding flanges. Flanged features are: easy accessibility, high strength, and good sealing performance. Construction Technology 2 Total plate flange duct (1) Duct machining of flange length of material, should take into account the length of the shear angle control for 61-62 mm. (2) is generally square off after the wind pipe, and then the seams connection. And on the four corners of the wind pipe flanges should be installed on the flange angle corner yards. (3) two flange surfaces of the duct, which is surrounded by the sealant is filled evenly to ensure sealing performance. (4) duct flange surface during processing, should pay attention to maintaining a 90 degree angle, not too big or too small, so as not to affect the quality of air duct flanges.