Threaded stainless steel tee is a kind of industrial pipe fittings, whose main function is to divert the medium passing through. The manufacturing process of threaded tees can be divided into forging and casting. Forging refers to heating, forging and forming with steel ingots or round bars, then turning on the lathe to process the threads. Casting refers to melting the steel ingots and pouring them into the model of the tees, and then cooling them. Because of different manufacturing processes, the pressure bearing capacity is also different. The pressure resistance of forging is much higher than that of casting. The main manufacturing standards of threaded tee generally include GB/T14626, ASME B16.11 and BS3799.