2 inch x 1-1/4 inch Black Iron Reducing Coupling Female x Female

2 inch x 1-1/4 inch Black Malleable Iron Coupling – Reducing Fitting for Threaded Pipe Systems

The 2 inch x 1-1/4 inch Black Malleable Iron Coupling is a reducing fitting designed for joining pipes of dissimilar diameters in threaded piping systems. Manufactured in accordance with ANSI/ASME B16.3 standards, this coupling is used extensively in low- to medium-pressure gas, oil, steam, and air applications.

Product Features

• ✅ Material: Malleable cast iron, conforming to ASTM A197 or A47 for strength and ductility
• ✅ Thread Type: Tapered NPT threads (per ANSI B1.20.1) for secure mechanical connections
• ✅ Reducing Design: Connects a 2 inch female-threaded fitting to a 1-1/4 inch male-threaded pipe or fitting
• ✅ Pressure Rating: Typically rated up to 300 PSI for air, steam, water, and oil services
• ✅ Temperature Range: Suitable for use in systems up to 150 psi at 350°F when properly sealed

Applications

This reducing coupling is commonly used in:

• Gas and propane distribution networks
• Steam and hydronic heating systems
• Compressed air pipelines
• Oil and fuel lines in commercial and light industrial systems

Installation Notes

To ensure a leak-tight seal, the coupling should be installed using a suitable thread sealant or PTFE tape. Use a properly sized pipe wrench to avoid over-torquing and potential cracking. All threads should be cleaned and inspected before assembly. Follow applicable local codes and safety guidelines during installation.

Certifications and Compliance

• Standard: ANSI/ASME B16.3 for malleable iron threaded fittings
• Thread Specification: ANSI B1.20.1 NPT (National Pipe Taper)
• Pressure Class: Class 150 or Class 300, depending on application and system design

Did You Know?

Black malleable iron is preferred in threaded gas piping because of its strength, heat resistance, and ability to maintain integrity under pressure. Its cast form allows it to deform slightly under load, reducing the risk of sudden failure in pressurized systems.

The 2 inch x 1-1/4 inch Black Malleable Iron Coupling provides a reliable, code-compliant solution for reducing branch connections in mechanical piping systems. Designed for durability and dimensional consistency, it is well-suited for long-term service in challenging environments.