Pipe u-bend is a pipe elbow whose shape is the U shape.
The elbows can be cut to length and then welded to straight pieces to form the desired shape. Exhaust systems on vehicles often require piping to run in between or around other parts of the car, so pipe elbows are used to accomplish the desired circuit. Stainless steel or other types of steel are common choices for automobile applications.
A pipe elbow is a type of piping that is bent at an angle or curve to allow straight pipes to be joined at an angle. The pipe elbow can be made from a variety of materials, from brass or cast iron to PVC or plastic, and they are often threaded to allow other pipes to be joined to them.