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

4" x 4-1/2" Black Steel Pipe Nipple – Schedule 40, Threaded Ends

The 4 inch x 4-1/2 inch Black Steel Nipple is manufactured for use in systems requiring threaded pipe-to-pipe connections. Cut from Schedule 40 seamless pipe and threaded per ANSI B1.20.1, this component provides a durable and code-compliant option for use in high-pressure systems conveying steam, air, water, oil, or gas.

Product Features

• ✅ Construction Standard: Pipe conforms to ASTM A53, Type E or S, Grade B
• ✅ Threading: NPT (National Pipe Thread), per ANSI B1.20.1 for compatibility with standard black malleable fittings
• ✅ Wall Thickness: Schedule 40 for reliable pressure retention in typical commercial and industrial piping systems
• ✅ Finish: Plain black (uncoated) for general use; suitable for non-corrosive interior applications or those with external protective measures

Dimensional Overview

• Nominal Pipe Size: 4 inches
• Overall Length: 4-1/2 inches
• Connection Type: Male threaded (NPT) on both ends

Typical Applications

• ✔ Natural gas and propane distribution lines
• ✔ Low-pressure steam and condensate return
• ✔ Compressed air systems
• ✔ Fire protection piping (when permitted by code)

Installation Guidance

This nipple should be installed with approved thread sealant or Teflon tape to ensure a gas- or liquid-tight seal. Tighten to manufacturer-recommended torque using calibrated equipment to avoid thread galling or overstress. Not intended for use in potable water systems unless galvanized or otherwise treated.

Important Considerations

• • Not resistant to corrosion in wet or humid environments without additional coatings
• • Use dielectric fittings when connecting to dissimilar metals to prevent galvanic corrosion

Compliance

• Pipe Material Standard: ASTM A53 / A106 (as applicable)
• Thread Conformance: ANSI B1.20.1 (NPT)
• Pressure Rating: Varies with application; refer to ASME B31.3 or B31.1 for system design requirements

The 4" x 4-1/2" Black Steel Nipple is designed for professionals requiring a reliable joining component in threaded Schedule 40 piping systems. Its rugged construction and adherence to dimensional and material standards ensure compatibility and performance in commercial, industrial, and mechanical applications.