Black Steel Pipe

Black steel pipe is a term given to carbon steel pipe with a black oxide scale on the surface. This black oxide scale is formed when the pipe is forged and is typically sealed with a protective oil to prevent corrosion. Because of this oxide scale and protective film, black steel pipe requires little maintenance and is used for a wide variety of applications, including in water, steam, air and gas services. Black steel pipes are typically cut and threaded in the field.

Black steel pipe has high tensile strength, making it suitable for a variety of demanding applications. The toughness of black steel pipe guards against cracks and allows high loading capacities. A critical property of black steel pipe is its uniformity. Black steel's tensile strength is uniform along the entire length of pipe, which ensures consistent and predictable diameters.

Compared to bolted lattice structures, installation of black steel pipe can be quicker and easier. Threaded ends, flanges or welded construction allows designers the ability to make adjustments as required. In addition to strength, black steel pipe can be field-fabricated and easily worked to any length. The availability of multiple components and black steel fittings reduces costs and can speed up structural steel pipe. Depending on the application and diameter, black steel pipe can be threaded or welded.

Once installed, black steel pipe has superior rust and corrosion resistance; without exterior damage such as nicks, scrapes or cuts, black steel is virtually maintenance-free. In addition, black steel piping does not shrink and retains its shape and strength. This eliminates any need to retighten or repair broken welds. This material is impervious to insects, rot or fire and, if required, can be further protected by painting or galvanizing, a powder coat or liquid application of zinc.