SUPREME AQUA GOLD MOULDED PIPE FITTING ELBOW 45 DIGREE - SCH80 ELBOW 45 DIGREE (Size-32mm) - "45 bends or 45 ells" are other names for 45-degree pipe elbows. To join tubes at a 45° pipe angle, use a 45° pipe elbow. This pipe fitting device, as its name suggests, is bent to generate a 45° change in the direction of the fluid or gas flowing through the pipe.