2-1/2 inch x 4-1/2 inch Black Steel Nipple

2-1/2" x 4-1/2" Black Steel Nipple – Threaded Pipe Segment for Pressure Piping Systems

The 2-1/2" x 4-1/2" black steel nipple is a straight threaded fitting fabricated from Schedule 40 carbon steel pipe. It is designed for use in non-potable systems including natural gas, low-pressure steam, air distribution, and hydronic heating. The male NPT threads at both ends allow direct connection between female-threaded pipe components in commercial and industrial piping networks.

Product Specifications

• Nominal Size: 2-1/2 inch NPT
• Length: 4-1/2 inches overall
• Material: Carbon steel, black finish (uncoated)
• Wall Thickness: Schedule 40
• Thread Type: ANSI/ASME B1.20.1 NPT, both ends (male x male)
• Manufacturing Standard: ASTM A733 (pipe nipples), pipe per ASTM A53 Grade A or B
• Pressure Rating: Up to 150 psi (dependent on system specifications and media)

Installation Guidance

Ensure threads are clean and properly aligned before installation. Use PTFE thread sealant or pipe joint compound rated for the intended system media. Tighten fittings using a correctly sized pipe wrench while avoiding excessive torque, which may damage threads or distort the fitting.

Application Overview

This black steel nipple is typically used in:

• Fuel gas and propane piping systems
• Steam and hydronic heating circuits
• Compressed air lines and mechanical utility piping
• Fire protection systems (where approved)

Material Considerations

Black steel pipe is intended for use in systems where corrosion resistance from internal or external water exposure is not a primary requirement. It is not suitable for potable water supply. For buried or wet applications, appropriate coatings or alternative materials should be specified to meet corrosion control requirements.