Why there are bends in the pipes that carry hot or cold liquids?

Bends in pipes that carry hot or cold liquids are essential for several reasons. They help accommodate thermal expansion and contraction of the pipes due to temperature changes, preventing stress and potential damage. Additionally, bends can facilitate easier routing through confined spaces and avoid obstacles, ensuring efficient fluid flow. Lastly, they can help reduce turbulence and pressure drops in the system, maintaining optimal performance.