This document provides information about PVC pipes, including how they are made from salt and oil/gas, their properties such as being chemically stable and having good insulation, and their various applications. PVC is used in medical supplies, transportation, construction, toys, and more. The document then focuses on PVC pipes, noting they are durable and do not corrode. It describes the different types of PVC pipes like water, sewage, and drainage pipes. It provides details on characteristics, uses, advantages and disadvantages of PVC pipes.