A flange connection is a type of polyethylene fitting that is connected to a pipe through a flange. The flange polyethylene connection is a threaded connection used to connect polyethylene pipes to flanged valves or any other type of flanged connection. The flanged connection consists of three separate parts known as the flange, ring, and polyethylene connection. The flange connection has a disc-like appearance and is always paired. It can be easily joined together by using bolts and nuts and can also be easily disassembled.