There are several advantages between using metallic or nonmetallic PPCH and improved version of PPRC materials instead of using steel piping. ADVANTAGES Typically has a lower installed cost and lower total cost of ownership. Will not corrode if the correct material is selected. This means: No cathodic protection or corrosion monitoring No chemical inhibitors are required. Corrosion allowance is avoided (Note: if the service is an erosive service, an erosion allowance may be required) Flow properties are superior than steel pipe Lower pumping costs Consistent friction factor through the life of the pipe More flexible than steel pipe. This allows for some nonmetallic piping to be ordered in spools that are hundreds of feet long.