Black Steel Pipe

Keywords: black steel pipe, black iron pipe, black carbon steel pipe
Black steel pipe is made from steel that has not been galvanised and is called black because of the dark coloured iron-oxide scale formed on its surface. it is used in the oil and petroleum industries to transport large quantities of oil and for the distribution of gas into homes. It is used in transporting water and gas in both rural and urban areas as we as for conduits that protect electrical wiring. It is also used for delivering high pressure steam and air.

The primary purpose of black steel pipe is to carry propane or natural gas into residential homes and commercial buildings. The pipe is manufactured without a seam, making it a better pipe to carry gas. The black steel pipe is also used for fire sprinkler systems because it is more fire-resistant than galvanized pipe.

Black steel pipe sizes:

Product Out Diameter Wall Thickness Length    
Black steel pipe 8.7mm-720mm
2.7mm-23.01mm 6mtr-18mtr

Seamless black steel pipe
Seamless black steel pipes are manufactured by extruding the metal to the desired length. Thus, they do not have any joint in its cross-section throughout its length.

How are black steel pipes different from carbon steel pipes?

In general, black steel pipes and carbon steel pipes have almost the same procedures for welding. That is in the case of general welding, but not of some specific application like very cold temperatures. Black steel pipe is not really a specification but rather a generic term used primarily by plumbers to distinguish regular steel pipe from galvanized steel pipe.

Black steel pipes are cast from several grades of ductile or malleable iron, whereas carbon steel pipes are generally welded or seamless. Black steel pipes are used for underground or submerged applications as well as for mainstream pipes and branches subjected to acids. It is also common to use cast iron pipes and fittings for municipal cold-water lines 4″ diameter and above. Commercial die casting is unsuitable for lines subjected to expansion strains, contractions, and vibration unless the pipe is very heavy. It is not suitable for superheated steam or for temperatures above 575 degrees F. Cast iron pipes in underground applications (such as sewer lines) usually have bell and spigot ends whereas exposed pipes usually have flanged ends.

Application of Seamless black steel pipe

1. Low and middle pressure fluid pipeline
2. Casing Tube
3. Boiler Pipe
4. Petroleum and natural gas industry
5. Chemistry industry
6. Electric industry

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