SUPREME AQUA GOLD MOULDED PIPE FITTING ELBOW 90 DIGREE - SCH80 ELBOW 90 DIGREE (Size-25mm) - In order to join tubes at a 90° angle, 90° pipe elbows are utilized. The elbow is always shaped like a right angle, as its name suggests. Such an elbow is sometimes referred to as a "90 bend" or "90 ell." This is a pipe fitting tool that has been bent to make a 90° change in the direction of the fluid or gas flowing through the pipe.