What is the acceptable angle for a bent pipe to maintain proper fit?

A bent pipe is crucial in ensuring that it fits properly in a piping system without causing stress or potential failure. The acceptable angle for a bend largely depends on the application and the type of piping being used. A 45-degree angle is often considered an ideal compromise between maintaining a smooth transition and ensuring structural integrity. It allows for adequate flow while avoiding unnecessary turbulence or pressure drops that sharper bends could cause.

In contrast, a 90-degree bend, while common in many applications, can lead to significant pressure loss and stress concentration at the joint, which may not be desirable in all situations. Similarly, while 15-degree and 30-degree angles exist for specific applications, they are generally less standard for many industrial piping practices compared to the 45-degree bend, which strikes a balance between flexibility in layout and performance efficiency in flow. Thus, the 45-degree angle is widely accepted as the optimal choice for maintaining a proper fit in a piping system.