The main frame of the branch pipe is made of high quality forgings. The material is the same as the pipe material. Carbon steel, alloy steel, stainless steel and so on. The branch pipe seat with supervisor using welding, and branch pipe or other pipe (such as short plug, etc.), instruments and valves connected with butt welding, socket welding, threaded connection of three types. The branch pipe is commonly used to manufacture standards of execution, such as MSS, SP-97, GB/T19326 and other standards.