A TEE is a type of pipe fitting that is used to create a 90-degree branch in a pipe system. It is made of a socket, which is a recessed area that the pipe is inserted into, and a weld neck, which is a flange that is welded to the pipe. Socket weld tees are typically made of carbon steel, stainless steel, or alloy steel. They are available in a variety of sizes and classes, and can be used for a variety of applications, including water, gas, steam, and oil. Here are the technical specifications of a socket weld tee: ANSI/ASME B16.11: This is the standard that specifies the dimensions and tolerances for socket weld tees. Class: The class of a socket weld tee indicates its pressure rating. Classes 150, 300, and 600 are the most common. Material: Socket weld tees can be made of carbon steel, stainless steel, or alloy steel. Size: Socket weld tees are available in a variety of sizes, from 1/8 inch to 24 inches. End connections: The end connections of a socket weld tee are typically threaded or socket weld. Here are some of the features of a socket weld tee: Leak-proof: Socket weld tees are designed to be leak-proof. The socket and weld neck are machined to tight tolerances, and the weld is made using a high-quality process. Corrosion resistant: Socket weld tees are available in a variety of materials that are resistant to corrosion. Carbon steel tees are typically coated with a protective finish, while stainless steel and alloy steel tees are naturally corrosion resistant. Durable: Socket weld tees are made of strong materials and are designed to withstand high pressure and temperature applications. Easy to install: Socket weld tees are relatively easy to install. The pipe is inserted into the socket and welded to the weld neck.