Elbow according to angle can be divided into 45 degrees elbow, 90 degrees elbow and 180 degree elbow, this three elbow are most commonly used, and according to the needs of the project it also includes 60 degrees elbow and other angle elbow. Stainless steel elbow variable wall thickness of pipe fittings, refers to the length direction along the pipe to make the wall thickness to change.
 

Reducing elbow is a special kind of elbow pipe fitting, the both ends of the cross section radius of this elbow are different. It is mainly used to connect two pipes of different paragraphs face radius , or used for changing the pipe diameter . This type of elbow need according to the specific project requirements or specific drawings for production generally.