What are the most common ferrous pipes used?

Ferrous pipes are those made from iron and its alloys, which are characterized by their iron content. Steel iron, which can refer to various types of steel such as carbon steel and cast iron, is commonly used in construction and plumbing applications due to its strength and durability. These materials are especially favored in situations requiring high-pressure applications or structural support, which is a critical factor in construction.

Steel iron offers advantages such as resistance to deformation under load and the ability to withstand high temperatures, making it a viable option for water and gas transportation, as well as for fire protection systems. The presence of iron in these pipes also provides corrosion resistance when properly coated or treated.

On the other hand, PVC and copper are non-ferrous materials. PVC is a plastic that is often used in drainage and plumbing but does not contain iron, while copper is frequently chosen for its excellent corrosion resistance and thermal conductivity, particularly in water supply systems. Neither of these materials falls into the category of ferrous pipes.

Thus, when identifying the most common ferrous pipes used in construction and plumbing, steel iron is the appropriate choice due to its characteristics and applications in various environments.