Tee is a forged fitting used for splitting and changing the flow direction of the run pipe. Tee can be manufactured with butt weld extremities, socket extremities or threaded extremities. Tees are in two types: Equal Tee: The primary purpose of a Tee is to make a 90�° branch from the main run of pipe. â?¦ The equal tee (or straight tee) is used as the branch has the same diameter as the run-pipe. Reducing Tee: The reducing tee is used as the branch has a smaller diameter as the run-pipe.