3/8 inch Black Iron 45 Degree Elbow Female x Female

3/8 inch Black Malleable Iron 45° Elbow – Female x Female NPT

The 3/8 inch 45° Elbow in black malleable iron provides a durable, angled transition for low- to medium-pressure piping systems. Designed with female NPT threads on both ends, this fitting is used to change the direction of flow in threaded black iron piping layouts while maintaining system integrity and alignment within confined or directional routing scenarios.

Manufactured in accordance with ASME B16.3, this malleable iron elbow meets industry requirements for use in natural gas, steam, air, and non-potable water applications. The 45-degree angle enables smoother directional transitions compared to 90-degree elbows, reducing turbulence and mechanical strain at directional changes.

Technical Specifications

• Nominal Size: 3/8 inch
• Connection Type: Female National Pipe Taper (NPT) x Female NPT
• Material: ASTM A197 black malleable cast iron
• Design Standard: ASME B16.3
• Thread Specification: ANSI B1.20.1
• Pressure Rating: 150 PSI steam, 300 PSI air/water/oil (non-shock)

Installation Considerations

Use with compatible black iron pipe and apply an appropriate thread sealant or PTFE tape based on system media. Avoid overtightening, which can lead to thread deformation or material cracking. Ensure proper alignment during installation to maintain directional flow and avoid cross-threading. This fitting is suitable for both horizontal and vertical configurations where a gradual change in direction is needed.

Common Applications

Used in compressed air lines, gas distribution systems, hydronic heating loops, and general-purpose mechanical systems. Common in commercial, industrial, and residential settings for piping runs requiring an angled offset without the space demands of a sweep or longer-radius fitting.

Material Insight

Black malleable iron is selected for its tensile strength, ductility, and resistance to mechanical stress. The iron’s graphite microstructure allows it to absorb vibration and tolerate temperature fluctuations, making it a preferred choice in both static and dynamic systems.