The body of the branch pipe is made of high-quality forgings, made of the same material as the pipe, including carbon steel, alloy steel, stainless steel, etc. The branch pipe seat and the main pipe are welded, and the connection with the branch pipe or other pipes (such as short pipe, wire plug, etc.), instrument, valve has three types of butt welding connection, socket welding connection, thread connection. The common manufacturing standards of the branch management table are MSS SP-97, GB/T19326 and other standards.