1-1/4 inch Black Iron 90 Degree Elbow Female x Female

1-1/4” Black Iron 90° Elbow – Threaded Fitting for Directional Changes in Gas and Fluid Piping

The 1-1/4” Black Iron 90° Elbow is a threaded malleable iron fitting designed to facilitate a right-angle change in direction for piping systems. Commonly used in gas, air, steam, and oil applications, this elbow features two female National Pipe Thread (NPT) ends, compatible with standard Schedule 40 or Schedule 80 steel pipe.

Manufactured in accordance with industry specifications, this fitting offers high mechanical strength, consistent dimensional tolerances, and corrosion resistance in low- to medium-pressure systems. The black finish provides surface protection during transport and storage and is intended for use in non-potable service lines.

Technical Specifications

• Material: Malleable Black Iron
• Nominal Size: 1-1/4 inch
• Connection Type: Female NPT x Female NPT
• Angle: 90 degrees
• Pressure Rating: 150 psi (steam); 300 psi (air, oil, non-shock water)
• Applicable Standards: ASTM A197, ASME B16.3, UL/FM where specified

Performance Features

• ✅ Threaded Ends – Precision-machined NPT threads ensure secure joint assembly and minimize the potential for leakage under pressure.
• ✅ Cast Malleable Iron Construction – Withstands impact, vibration, and high operating temperatures in mechanical systems.
• ✅ Black Coated Surface – Oil-coated to deter corrosion in dry gas and air installations; not intended for use with potable water systems.

Installation Guidelines

Use pipe joint compound or PTFE thread sealant to achieve a pressure-tight connection. Ensure all mating threads are clean and properly aligned before assembly. Avoid overtightening to preserve thread integrity and fitting geometry. Installation must comply with applicable mechanical or fuel gas codes.

Common Applications

This 1-1/4” black iron elbow is typically used in gas distribution piping, compressed air systems, steam lines, and low-pressure fluid transport. It is suitable for use in residential, commercial, and industrial settings where directional changes are required in threaded piping assemblies.

Regulatory Considerations

Black iron fittings are not rated for use with potable water due to their lack of corrosion-resistant lining. In fuel gas systems, they must be installed per the requirements of NFPA 54 (National Fuel Gas Code) and local mechanical codes.

The 1-1/4” Black Iron 90° Elbow provides a robust and reliable connection for directional changes in pressure-rated pipe systems. Its durable construction and standard thread compatibility make it a key component in industrial and mechanical piping configurations.