2-1/2 inch x 8 inch Black Steel Nipple

2-1/2" x 8" Black Steel Nipple – Threaded Pipe Segment for Industrial and Utility Applications

The 2-1/2" x 8" black steel nipple is a Schedule 40 pipe segment with NPT threads at both ends, used for joining components in mechanical, gas, and hydronic systems. Manufactured from ASTM A53 Grade A or B welded or seamless carbon steel, this fitting provides a rigid, pressure-rated connection in non-potable piping networks.

Technical Specifications

• Material: Carbon steel with black oxide finish (uncoated)
• Nominal Size: 2-1/2 inch
• Length: 8 inches overall
• Wall Thickness: Schedule 40 (standard weight)
• Thread Type: NPT (ANSI/ASME B1.20.1), male x male
• Manufacturing Standard: Conforms to ASTM A733 and pipe per ASTM A53
• Operating Pressure: Up to 150 psi (verify based on system requirements)

Installation Guidelines

Inspect threads before assembly to ensure they are clean and undamaged. Apply PTFE tape or compatible thread sealant based on system media and temperature. Use a properly sized pipe wrench for tightening, ensuring no over-torquing to prevent thread damage or distortion. Always pressure-test the system in accordance with project specifications after installation.

Application Areas

Commonly installed in:

• Fuel gas and propane piping systems
• Low-pressure steam and hot water distribution
• Air compressor and mechanical utility lines
• Fire sprinkler systems (where approved)

Material Suitability

Black steel fittings are appropriate for systems where exposure to potable water, corrosive chemicals, or outdoor weathering is not anticipated. For exposed or buried installations, protective coatings or alternate materials should be considered to comply with corrosion control standards.