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Black Steel Pipe Description: Black steel, also known as black iron, refers to uncoated steel that forms a black oxide scale when forged. This scale gives the pipe its characteristic finish. To prevent rust and corrosion, manufacturers coat black steel with protective oil before shipping. These pipes are durable and require minimal maintenance, making them suitable for long-term use in various applications. Applications: Black steel pipes find wide utility across different industries: Water, Gas, Air, and Steam Distribution: Used for gas distribution within and outside buildings, as well as for circulating air and steam. Boiler Systems: Essential for hot water circulation in boiler systems due to their corrosion-resistant properties. Oil and Petroleum Industries: Employed as line pipes for transporting oil and petroleum products. Water Wells and Sewage Systems: Utilized in water wells and for water, gas, and sewage purposes. Usage Limitations: Not Suitable for Potable Water: Black steel pipes are not recommended for use in potable water systems due to the potential for rust and corrosion affecting water quality. Not for Drain Waste or Vent Lines: Inappropriate for drain waste or vent lines where corrosion resistance is critical for long-term functionality. Manufacturing and Fittings: Cutting and Threading: Pipes and tubes are cut and threaded to fit specific requirements. Larger diameter pipes are welded rather than threaded for strength and durability. Fittings: Fittings for black steel pipes are typically made of black malleable (soft) cast iron. They are connected by screwing onto the threaded pipe, with pipe joint compound applied to ensure a secure seal. Summary Black steel pipes are robust, low-maintenance solutions ideal for non-potable water distribution, gas systems, boiler applications, and industrial piping needs. Their durability and resistance to rust make them a reliable choice across diverse environments and applications.
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