1-1/2 inch x 36 inch Black Steel Nipple

1-1/2" x 36" Black Steel Nipple – Schedule 40, Threaded Pipe Segment for Industrial and Mechanical Use

The 1-1/2" x 36" Black Steel Nipple is a Schedule 40 carbon steel pipe nipple, threaded NPT on both ends, suitable for use in pressure-rated gas, air, steam, and water distribution systems. Manufactured from ASTM A53 Grade B or equivalent material, this fitting provides a continuous 36-inch extension for use in mechanical assemblies requiring long runs without intermediate joints.

Black steel nipples are commonly used in both above-ground and concealed piping systems. Their uniform wall thickness and corrosion-resistant black oxide coating offer protection during handling and installation, while maintaining compatibility with standard threaded steel fittings, valves, and system components.

Technical Specifications

• Nominal Pipe Size: 1-1/2 inch
• Length: 36 inches (3 feet)
• Material: Carbon Steel (ASTM A53 Grade B, welded or seamless)
• Wall Thickness: Schedule 40
• Connection: Male NPT x Male NPT (ASME B1.20.1)
• Finish: Black oxide coating
• Pressure Rating: Up to 150 PSI (varies by application and system design)

Performance Features

• ✅ Threaded Ends: Machined NPT threads ensure compatibility with standard fittings and leak-tight seals when used with thread sealant.
• ✅ Long-Length Fabrication: Provides extended reach without requiring coupling, minimizing potential leak points.
• ✅ Mechanical Durability: Schedule 40 construction supports system integrity in dynamic or vibration-prone applications.
• ✅ Black Finish: Offers basic corrosion resistance in dry and low-humidity environments, ideal for utility and concealed installations.

Common Applications

This 1-1/2" x 36" nipple is used in commercial and industrial systems including:

• Gas and propane piping networks
• Low-pressure steam systems
• Hydronic heating and chilled water lines
• Compressed air or non-potable utility piping

Installation Guidance

Apply PTFE tape or thread compound to male threads before installation. Use pipe wrenches to tighten to the specified torque. Ensure alignment and pipe support meet applicable plumbing and mechanical codes to prevent joint stress and system failure.

Compliance Note

This product is not certified for potable water systems unless explicitly marked lead-free and listed accordingly. Use only in systems permitted under ASME B31.1 or B31.3 mechanical codes, and verify compatibility with project specifications and local requirements.

Conclusion

The 1-1/2" x 36" Black Steel Nipple provides a structurally sound, pressure-rated extension for threaded piping systems in HVAC, mechanical, and industrial settings. With its Schedule 40 construction and corrosion-resistant finish, it supports long-lasting performance in rigid and high-demand piping assemblies.