... 90°elbow, 4).45°elbow, 5).Equal tee, 6).Reducing tee,7).Reducing coupling (one-step forming) ,8).Reducing coupling (post forming),3 ... .The series of hot melt butt joint pipe fitting (welded mode)Euqual Tee ... 3segments),22.5°Elbow,11.25°Elbow,Reducing Tee (Saddle type),Reducing Tee (Equal tee being reduced),Reducing cross fitting (saddle type), ...