1. The sealing gasket and flange sealing surface should be cleaned thoroughly, and there should be no scratches, spots or other defects that affect the sealing performance of the connection. 2. The ou......

1. Asbestos gaskets are better than non asbestos gaskets. The main components of asbestos gaskets are asbestos, filler, and rubber, among which asbestos and filler are resistant to high temperatures; ......