A black steel pipe coupling is a threaded fitting used to connect two male-threaded pipes in low- and medium-pressure pipeline systems. Manufactured from high-quality carbon steel, our couplings deliver excellent mechanical strength, durability, and cost-effectiveness for industrial and commercial applications.
These fittings are widely used in:
Water supply systems
Fire sprinkler pipelines
Oil & gas transmission
Air and gas piping systems
Construction and mechanical projects
We manufacture according to ANSI, ASTM, BS, and DIN standards to meet global market requirements.
| Material | Carbon Steel |
|---|---|
| Material Grade | A106 Gr.B |
| Thread Type | NPT |
| Standard | ASTM A106, ASTM A53 |
| Surface Finish | Black |
| Size Range | 1/8" – 12" |
| Schedule | SCH 40: 1.73mm-9.53mm, SCH 80: 2.41mm-17.48mm |
| Thread Standard | ASME B1.20.1 |
| Pressure Rating | 150 PSI (SCH 40) / 300 PSI (SCH 80) |
Black steel pipe couplings typically feature:
Natural black oxide finish
Light anti-rust oil coating
Industrial black painted coating (optional)
Unlike galvanized fittings, black steel fittings are designed for indoor or protected environments. For outdoor or corrosive environments, painting or additional coating is recommended.
