Vitrified clay pipe is classified as what type of pipe?

Vitrified clay pipe is classified as rigid pipe due to its inherent structural properties. This type of pipe is made from clay that has undergone a vitrification process, whereby the clay is fired at high temperatures to become glass-like and non-porous. As a result, vitrified clay pipes are known for their strength and durability, making them suitable for various applications, especially in sewage and drainage systems.

The rigidity of vitrified clay pipes means they maintain their shape under load and do not easily bend or deform, which is critical in maintaining the integrity of underground piping systems. This characteristic allows them to resist collapse from external forces, such as soil pressure or traffic load.

The other types of pipes listed, such as flexible and plastic, possess different attributes. Flexible pipes can bend and absorb movement without breaking, which is opposed to the rigid nature of vitrified clay pipes. Similarly, plastic pipes typically are lighter and can offer flexibility and resistance to corrosion, while corrugated pipes usually have a wavy structure that provides flexibility and lightweight properties, allowing for easier installation in certain scenarios. These differences highlight why vitrified clay is distinctly categorized as a rigid pipe.