1. socket, which is used to connect with the socket pipe (one end of which is a socket and the other end is a straight pipe). During construction, a gasket with a corresponding size will be placed in the socket, and then the straight pipe end of the pipe will be inserted.

2. flange end/flanged is connected with a flanged pipe (one end is flanged and the other end is straight, or both ends are flanged). The two flanges are connected by bolts, and a rubber pad is also placed in the middle to play a sealing role.

I don't know if it is the answer you want

The interface is integrated with the pipe fitting, so there is no need to use a separate interface.