Which of the following is a common issue with metal tubing installations?

Tension in the tubing is a recognized issue in metal tubing installations because it can lead to stress and potential failure of the tubing system. When metal tubing is under tension, it is prone to deformation, which can create leaks or other failures as the material may not return to its original shape. Proper installation techniques are essential to minimize tension on metal tubing, ensuring that it is adequately supported and routed in a manner that prevents excessive forces from being applied.

Other options may not represent as common or significant issues. For instance, while improper material selection can certainly lead to problems, it is more of a foundational issue that can be avoided with proper planning and knowledge. Excessive flexibility is not typically associated with metal tubing, which is designed to be rigid and withstand specific pressures. Incorrect color-coding might pertain to safety or identification but does not directly impact the structural integrity or function of the tubing. Focusing on managing and mitigating tension during installation is critical to maintaining the reliability and longevity of metal tubing in fluid systems.