2-1/2 inch x 3 inch Black Steel Nipple

2-1/2" x 3" Black Steel Nipple – Industrial Grade Threaded Pipe Fitting

The 2-1/2" x 3" Black Steel Nipple is a precision-machined, schedule 40 threaded pipe segment designed for use in high-pressure, non-potable fluid, steam, and gas distribution systems. Manufactured from welded or seamless black steel pipe, this component is engineered for durability and compatibility with standard pipe threads per ANSI/ASME B1.20.1 specifications.

Commonly installed in mechanical, HVAC, and process piping systems, this nipple provides a reliable threaded connection between two female-threaded fittings or pipe sections. Its robust construction makes it ideal for use in commercial and industrial environments where mechanical strength and temperature resistance are required.

Key Product Features

• ✅ Heavy-Duty Fabrication Constructed from black steel pipe for long service life in demanding conditions
• ✅ Threaded Ends Male NPT threads on both ends for use with standard female-threaded components
• ✅ High Working Pressure Capability Suitable for applications such as steam, air, natural gas, and oil systems
• ✅ Surface Protection Black oxide finish enhances resistance to rust in dry environments
• ✅ Dimensional Consistency Cut and threaded to ensure alignment and sealing reliability

Technical Specifications

• Nominal Pipe Size: 2-1/2"
• Length: 3"
• Material: Carbon steel (ASTM A53 Grade A or equivalent)
• Thread Type: NPT (National Pipe Tapered Thread)
• Finish: Black lacquer coating
• Compliance: ANSI/ASME B1.20.1, ASTM A733, and MSS-SP-79 (for nipples and pipe ends)

Installation Notes

Use pipe joint compound or PTFE tape on male threads prior to installation to ensure a leak-resistant seal. Avoid overtightening, which can damage threads and compromise sealing performance. Thread engagement should typically range between 3.5 to 5 full turns beyond hand-tight.

Applications

This steel nipple is used in gas distribution, air compressor lines, oil circulation systems, low-pressure steam installations, and fire protection system assemblies. It is not intended for potable water applications due to its untreated interior and exterior surfaces.

Industry Insight

Black steel is favored in systems requiring strength, thermal resistance, and pressure endurance. Its use is prevalent in pipeline supports, terminal connections, and extensions where welding is not feasible or necessary.

Specify the 2-1/2" x 3" Black Steel Nipple for your next mechanical or industrial installation requiring dependable threaded pipe connections. Built to code, tested for performance, and engineered for field-proven reliability.