Performance characteristics of UPVC flange: It needs to be used in conjunction with flange gaskets to prevent water leakage. The flange connection consists of a pair of flanges, a gasket, and several bolts and nuts. The gasket is placed between the two flange sealing surfaces. After tightening the nut, the specific pressure on the gasket surface reaches a certain value and deforms, filling the uneven areas on the sealing surface to ensure a tight and leak free connection. Flange connection is an important connection method in pipeline construction. The connection is easy to use and can withstand high pressure, making it convenient for pipeline connection maintenance and renovation.