Which type of pipe is known for its ability to withstand high temperatures?

Copper pipes are recognized for their excellent thermal conductivity and ability to withstand high temperatures. They can handle temperatures exceeding 200°F and are commonly used in water supply lines where hot water needs to be transported. This characteristic makes copper an ideal choice for plumbing systems involving supply lines for hot water, heating systems, and other applications where heat resistance is crucial.

In contrast, PVC, PEX, and ductile iron pipes have limitations concerning high temperatures. PVC, for instance, is a thermoplastic material that can deform or become less effective when exposed to high temperatures, typically not exceeding 140°F. PEX is flexible and resistant to freezing temperatures but also has a maximum temperature rating around 200°F, making it less reliable for high-temperature applications compared to copper. Ductile iron, while robust and used in certain industrial applications, is primarily designed for strength and durability in pressure situations rather than temperature resistance.

Thus, copper's inherent properties of heat resistance and suitability for high-temperature environments firmly establish it as the correct choice for this question.