1-1/4 inch x 24 inch Black Steel Nipple

1-1/4" x 24" Black Steel Schedule 40 Nipple – Threaded Pipe Segment for Gas and Water Systems

The 1-1/4" black steel nipple is a schedule 40 pipe segment with male NPT threads on both ends, manufactured to meet dimensional tolerances specified under ANSI/ASME B1.20.1. With a length of 24 inches, this nipple provides a rigid connection option for joining compatible threaded fittings or components in industrial piping assemblies.

Constructed from welded or seamless black steel pipe, this component is suitable for use in low- to medium-pressure fluid transport applications, including natural gas distribution, closed-loop hydronic systems, and compressed air lines. The black oxide finish provides a degree of corrosion resistance for indoor applications, although it is not recommended for potable water or exterior use without supplemental protection.

Performance and Design Attributes

• ✅ Threaded NPT Ends – Conforms to ANSI B1.20.1 for tapered pipe threads; requires appropriate thread sealant to ensure a gas- or liquid-tight joint.
• ✅ Schedule 40 Wall Thickness – Provides suitable pressure handling capability for a wide range of non-potable plumbing systems.
• ✅ Standard Material Grade – Manufactured from ASTM A53/A106 black steel pipe, compatible with general piping installations.
• ✅ Cut-to-Length Fabrication – Threads are machine-cut after pipe is sectioned to specified length, maintaining uniform engagement depth and integrity.

Technical Specifications

• Nominal Size: 1-1/4 inch
• Length: 24 inches (2 feet)
• Material: Black steel (ASTM A53/A106 Grade B)
• Wall Type: Schedule 40
• Ends: Male NPT (National Pipe Taper) threads
• Pressure Rating: Dependent on system design and application (refer to ASME B31.3 or applicable local code)
• Compliance: Suitable for fuel gas, air, oil, and non-potable water systems

Installation Notes

For optimal performance, use with compatible female-threaded iron or steel fittings. Ensure threads are clean and apply approved thread sealant or PTFE tape. Wrench-tighten until secure; avoid overtightening, which may damage the threads or fitting. Verify compliance with local mechanical and fuel gas codes before installation.

Common Applications

This fitting is commonly used in mechanical rooms, utility lines, HVAC systems, and gas piping networks where long, straight connections are needed without field threading. Appropriate for both new construction and retrofit installations in industrial, commercial, and multi-residential settings.

Additional Considerations

Black steel nipples are not suitable for use with potable water unless externally coated or lined. For outdoor use, rust-inhibitive coatings or wrapping are recommended to prevent corrosion-related degradation.

This 1-1/4" x 24" black steel nipple is a practical solution for professionals seeking a reliable, rigid segment in gas or hydronic installations. Manufactured to industry standards, it offers the mechanical strength and dimensional accuracy required for code-compliant system design.