2-1/2 inch x 5 inch Black Steel Nipple

2-1/2" x 5" Black Steel Nipple – Schedule 40, Threaded Ends

The 2-1/2" x 5" Black Steel Nipple is a Schedule 40 fitting designed for use in non-potable water systems, natural gas distribution, fire sprinkler lines, and low-pressure steam applications. Manufactured from welded black steel pipe, it features male National Pipe Thread (NPT) ends for easy connection to other threaded components within industrial and commercial piping systems.

This nipple is cut and threaded to standard tolerances to ensure proper alignment and engagement with mating parts. The black oxide finish provides moderate corrosion resistance during handling and installation, making it suitable for interior use where moisture levels are controlled or in systems where protective coatings or wraps are applied.

Performance Characteristics

• ✅ Welded Steel Construction – Made from ASTM A53 Grade A or equivalent carbon steel pipe for structural strength and pressure integrity.
• ✅ Threaded Male x Male Ends – Precision-machined NPT threads ensure reliable, leak-resistant joint performance.
• ✅ Schedule 40 Wall Thickness – Supports typical applications in mechanical, HVAC, and plumbing systems with moderate pressure requirements.
• ✅ Machined Cut Length – Cut to 5 inches overall length, allowing for compact system layouts or spacing needs in assemblies.

Specifications

• Nominal Pipe Size: 2-1/2 inch
• Length: 5 inch
• Wall: Schedule 40
• Material: Black carbon steel
• Thread Type: ANSI B1.20.1 NPT (both ends)
• Compliance: Meets ASME B36.10 and ASTM A53 specifications (or equivalent)

Typical Applications

This black steel nipple is used extensively in mechanical system rough-ins, boiler piping, gas distribution lines, and other industrial applications where a robust, threaded steel connection is required. Ideal for heating system piping manifolds, branch supply runs, and control loop installations in plant maintenance environments.

Installation Notes

Thread sealant (pipe dope) or PTFE tape should be applied to ensure proper sealing at threaded joints. This product is not suitable for potable water service due to the absence of internal lining and the nature of black steel materials.

Material Insight

Black steel is preferred in gas and hydronic systems due to its strength and workability. Its bare finish facilitates threading and joining during fabrication but may require corrosion protection in exposed or humid areas.

Note to contractors: The 2-1/2" black steel nipple is a standard component for use in field-assembled piping systems. Always confirm compatibility with system pressure and media prior to installation.