Black steel pipe is made of steel that has not been galvanized. Its name comes from the scaly, dark-colored iron oxide coating on its surface. Thus, it’s used in applications that don’t require galvanized steel.
Uses
Black pipe is a high-strength pipe that has an iron oxide coating. Hence, its common uses are gas distribution to homes, carrying potable water or hot water from boilers, or draining wastes. Similarly, the oil Industry uses black pipes to transport oil.