For what reason would a steamfitter use CPVC piping instead of PVC?

Choosing CPVC piping over PVC is primarily due to its ability to handle higher temperatures. CPVC, which stands for chlorinated polyvinyl chloride, is specially formulated to withstand elevated temperatures, making it suitable for hot water systems and certain chemical applications. The increased heat resistance is significant for steamfitting and plumbing applications involving hot water, where failure to maintain structural integrity at high temperatures could lead to leaks or pipe burst.

In contrast, while PVC has its applications, it typically is rated for use in cold water systems and does not perform well when exposed to high heat. This difference in temperature tolerance is crucial for a steamfitter when deciding on the appropriate material to use for specific jobs.

Focusing on the other options, flexibility is a characteristic where PVC may have an advantage; however, it does not directly address the need for high-temperature applications. Cost considerations can vary based on market factors, but in the context of temperature resistance, CPVC's durability justifies its potential cost difference. Lastly, installation ease is often similar between the two materials, but this aspect does not outweigh the importance of thermal resistance in steamfitting work.