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Black Steel Pipes & Tubes

When steel pipe is forged, a black oxide scale forms on its surface to give it the finish which is seen on this type of pipe. Because steel is subject to rust and corrosion, the factory also coats it with protective oil. Those black steel are used for manufacturing pipe and tueb, which will not rust for a long time and requires very little maintenance. It is sold in standard 21-foot lengths TBE.
Black steel pipes and tubes are cut and threaded to fit the job. Fittings for this type of pipe are of black malleable (soft) cast iron. They connect by screwing onto the threaded pipe, after applying a small amount of pipe joint compund on the threads. Larger diameter pipe is welded rather than threaded. Black steel pipe is cut either with a heavy-duty tube cutter or cutoff saw or by hacksaw.

Widely applicable for ordinary uses in water, gas, air and stream, black steel tube and pipes are utilized for gas distribution inside and outside the house and for hot water circulation in boiler systems. It is also used for line pipis in oil and pitroleum industries, for water wells and for water, gas and sewage purposes. It is not used for potable water or for drain waste or vent lines.

Steel Pipe and Tube Information
For identifying the steel pipes in terms of its standard reference and grade, it is often neccessary to understand the various technical and product specifications. This section offer guidance on steel pipe specifications, applications and the various organization and forums imparting detailed information about steel pipes.