Buttweld Pipe Coupling is required to connect two pipes of the same size and thickness. It is designed to be welded directly to the end of the pipe, creating a strong, leak-free connection. The coupling consists of two pieces, each with a beveled end that is inserted into the pipes to be joined. The two pieces are then welded together using a butt weld, which is a type of weld where the two pieces are fused together at the joint without any overlap. This creates a smooth, seamless connection between the pipes.