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

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

The 1-1/2" x 2-1/2" Black Steel Nipple is a short-length, male-threaded Schedule 40 pipe segment used to join two female-threaded fittings or valves in mechanical and plumbing systems. Manufactured from carbon steel in compliance with ASTM A53 or equivalent standards, this nipple is intended for use in non-potable water, low-pressure steam, gas, and oil applications where welding is not required or permitted.

The black finish indicates an uncoated carbon steel surface, typically used in indoor, dry, and fire-resistant systems. Both ends are NPT (National Pipe Tapered) threaded to ANSI B1.20.1 specifications, ensuring compatibility with standard fittings in a wide range of pipe assemblies.

Product Specifications

• Material: Welded or seamless carbon steel, black finish
• Nominal Pipe Size: 1-1/2 inch
• Overall Length: 2-1/2 inches
• Wall Thickness: Schedule 40
• Thread Type: NPT – both ends, tapered threads per ANSI/ASME B1.20.1
• Standards: Manufactured in accordance with ASTM A733 and A53 (or A106 when applicable)

Installation Notes

Before assembly, ensure threads are clean and apply pipe thread sealant or PTFE tape to minimize the risk of leakage. Proper torque should be applied to avoid deformation or thread damage. System design must account for alignment, support, and thermal expansion to prevent stress at joints. This fitting is not intended for use in potable water systems unless lined or otherwise approved.

Typical Applications

Used in commercial and industrial piping systems, including hydronic heating loops, fuel oil lines, natural gas piping (subject to local code approval), and low-pressure steam systems. The short length makes it suitable for connections in confined areas such as equipment rooms and mechanical chases.

Material Considerations

Black steel is not corrosion-resistant and should only be used in dry, non-corrosive environments unless paired with additional protection or coatings. For outdoor or buried installations, a galvanized or epoxy-coated alternative should be selected. Pressure and temperature limitations should always be verified against system requirements and local code provisions.

The 1-1/2" x 2-1/2" Black Steel Nipple is a standard component for threading into valves, tees, elbows, or flanged assemblies, providing mechanical strength and dimensional accuracy for code-compliant installation in non-potable pressurized systems.