3/4 inch x 3 inch Black Steel Nipple

3/4 Inch x 3 Inch Black Steel Nipple – Threaded Schedule 40 Pipe Fitting

The 3/4 inch x 3 inch black steel nipple is manufactured to connect sections of pipe or extend existing threaded systems in gas, oil, steam, or hydronic heating applications. Constructed from Schedule 40 welded steel pipe, this component offers strength, pressure resistance, and reliable performance in mechanical and plumbing assemblies.

Performance-Driven Fabrication

Black steel nipples are cut, threaded, and chamfered to comply with dimensional tolerances specified under ANSI and ASTM standards. Their durability and sealing integrity are critical for long-term system reliability in high-demand applications:

• ✅ Thread Accuracy Machined NPT threads ensure uniform engagement and reduce the likelihood of joint failure under thermal or pressure fluctuations.
• ✅ Structural Strength Formed from carbon steel pipe with high tensile strength, suitable for demanding system pressures and operating temperatures.
• ✅ Corrosion Resistance (External) Black oxide finish offers surface protection against atmospheric corrosion where pipe is exposed.
• ✅ Leak Prevention Compatible with PTFE tape or approved pipe dope for sealing threaded joints in fuel gas or hydronic systems.

Installation Requirements

For effective performance, ensure threads are clean and undamaged before assembly. Apply thread sealant rated for the intended medium (e.g., gas, steam, or water). Use calibrated tools to avoid overtightening, which can deform threads and compromise sealing surfaces.

Common Applications

This fitting is widely used in gas distribution piping, steam condensate returns, water supply header extensions, and mechanical system piping. It is frequently specified for installations where short lengths of threaded pipe are needed between valves, couplings, or elbows.

Material and Use Considerations

Black steel is not suitable for potable water use due to potential corrosion of untreated surfaces in contact with oxygenated water. It is, however, preferred in gas and oil systems where its strength and compatibility with threaded steel systems provide reliable connections.

Specification Details

• Nominal Size: 3/4 inch
• Length: 3 inches
• Material: Welded Schedule 40 Black Carbon Steel
• Ends: Male National Pipe Thread (NPT), both ends
• Compliance: Meets ASTM A53 and ANSI/ASME B1.20.1 specifications

Use the 3/4 inch x 3 inch Black Steel Nipple in applications where durable, pressure-rated threaded connections are essential. It is a proven component for extending pipe runs and supporting stable mechanical assemblies.