What type of fittings are typically used at every right angle in control piping?

In control piping, the type of fittings typically used at every right angle are elbows. Elbows are specifically designed to change the direction of piping and can typically fit into situations where a 90-degree turn is necessary. They allow for smooth transitions within the piping system which is crucial for maintaining flow and pressure in control systems.

Tees are used to branch off a line and create a junction, crosses have four openings to allow for connections in multiple directions, and adapters are generally used to connect pipes of different diameters or materials. While they serve essential functions in piping systems, they do not serve the role of changing direction at right angles in the same manner as elbows do.