Along with elbows, carbon steel pipe fittings likewise consist of tees, which attach 3 sections of pipe, producing joints for liquid circulation. Equal tees are used when the linking branches are of the exact same size, while reducing tees are used when the branch pipe is of a smaller diameter. https://postheaven.net/poppysweets14/the-role-of-butt-weld-pipe-fittings-in-high-pressure-environments