3 inch x 1-1/2 inch Black Iron Bushing

3 Inch x 1-1/2 Inch Black Iron Bushing – Threaded Reducing Fitting

The 3" x 1-1/2" Black Iron Bushing is a reducing fitting used to join threaded pipe systems of differing nominal sizes. Designed for compatibility with malleable iron pipe components, this bushing provides a mechanically sound, pressure-rated connection where a 3 inch female NPT fitting must be reduced to a 1-1/2 inch male NPT thread.

Key Product Features

• ✅ Malleable Iron Construction – Manufactured from black malleable iron for mechanical strength and dimensional stability in pressurized gas and fluid systems.
• ✅ Corrosion-Resistant Surface – Black finish helps resist scale and oxidation in dry-pipe and low-moisture environments.
• ✅ Threaded Connections – Female NPT threads on the exterior and male NPT threads on the interior allow for direct installation between properly sized iron fittings or steel pipe.
• ✅ Compact Reducing Profile – Designed to minimize the length of fittings in tight system layouts or when reducing pipe diameter without the use of multiple adapters.

Technical Specifications

• Material: ASTM A197 black malleable iron
• Nominal Size: 3 inch (female) x 1-1/2 inch (male)
• Connection Type: Threaded NPT (per ANSI B1.20.1)
• Standard Compliance: ASME B16.3 / B16.14
• Maximum Pressure Rating: 150 PSI (non-shock, for steam and liquid systems)

Typical Use Cases

This reducing bushing is suited for installation in:

• Natural gas and propane piping systems
• Low- and medium-pressure steam or hot water heating lines
• Hydronic heating loops and equipment branch lines
• Compressed air systems

Installation Guidelines

Threaded connections should be assembled using appropriate sealing materials such as PTFE tape or pipe joint compound. Over-torquing should be avoided to maintain thread integrity and prevent stress failure. Use of compatible pipe wrenches is recommended for proper seating.

The 3" x 1-1/2" Black Iron Bushing is engineered for use in piping applications where pressure integrity and dimensional accuracy are required. It supports professional-grade mechanical assemblies with reliable performance in high-demand environments.