1-1/4 inch Black Iron 45 Degree Elbow Female x Female

1-1/4 inch Black Malleable Iron 45° Elbow – Threaded FPT x FPT

The 1-1/4 inch black malleable iron 45-degree elbow is designed to redirect flow at a 45° angle within a threaded steel or iron piping system. This fitting features female National Pipe Taper (NPT) threads on both ends and is commonly used in applications involving gas, low-pressure steam, air, and water systems.

Manufactured in accordance with ASME B16.3 and made from ASTM A197 grade malleable iron, this elbow supports Class 150 service. It is black-coated for use in non-potable applications where galvanized coatings are not required. The angled design helps reduce pressure loss compared to 90° elbows in horizontal changes of direction.

Technical Specifications

• Size: 1-1/4 inch NPS (Nominal Pipe Size)
• Material: ASTM A197 Black Malleable Iron
• Connection Type: Female NPT x Female NPT
• Angle: 45 degrees
• Pressure Rating: Class 150 (per ASME B16.3)
• Finish: Black oxide coating for dry or gas service

Common Applications

Used in threaded pipe systems where directional change is needed while maintaining consistent flow dynamics. Typical uses include:

• • Natural gas and propane distribution systems
• • Low-pressure steam piping
• • Hydronic heat loop redirection
• • Compressed air systems and mechanical process lines

Installation Considerations

All threaded connections should be made using an approved thread sealant or PTFE tape to ensure a leak-free seal. Do not overtighten—use torque within manufacturer-recommended guidelines. Elbows should be properly supported and aligned to prevent mechanical stress at the joints.

Material Performance Note

Black malleable iron offers a high strength-to-weight ratio and is well-suited for mechanical threading. It performs reliably under thermal cycling and is preferred in systems where zinc coatings (as in galvanized fittings) are not required due to chemical compatibility or fire-safety regulations.