Stainless steel pipe fittings are a type of fitting, named due to their composition of stainless steel material. They include items such as stainless steel elbows, tees, crosses, reducers, and caps. According to the method of connection, they can be divided into four categories: socket-welded stainless steel fittings, threaded stainless steel fittings, flanged stainless steel fittings, and welded stainless steel fittings. Stainless steel elbows are used at pipe bends; flanges are used to connect pipes together and are mounted at the pipe ends. Stainless steel tees are used where three pipes converge; stainless steel crosses are used where four pipes converge; and stainless steel reducers are used where pipes of different diameters connect. Main stainless steel grades: 304, 304L, 316, 316L.