Black Steel Pipe
Black steel pipes are non-galvanized steel pipes. Black steel pipe, its name comes from the scaly, dark-colored iron oxide coating on its surface. It's used in applications that don't require galvanized steel. Black steel pipe is used in applications that do not require the pipe to be galvanized.
Galvanized pipes are steel pipes that have been dipped in a protective zinc coating to prevent corrosion and rust. Galvanized piping was commonly installed in homes built before 1960. When it was invented, galvanized pipe was an alternative to lead pipe for water supply lines.
This grating is a system of interlocking, perpendicular bars, it provides a smooth clean look ideal for architectural applications such as grilles, divers and screens. It is used in the same structural applications as its welded steel counterpart.
Polyvinyl chloride is the world's third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene. About 40 million tonnes are produced per year. PVC comes in two basic forms: rigid and flexible.