3/8 inch Black Iron 90 Degree Street Elbow Female x Male

3/8 inch Black Iron 90° Street Elbow – Malleable Iron, Threaded Male x Female

The 3/8 inch Black Iron 90° Street Elbow is a malleable iron fitting designed for directional transitions in threaded piping systems. With male NPT threads on one end and female NPT threads on the other, this street elbow allows for a 90-degree turn without requiring a coupling, reducing joint count in tight configurations.

Manufactured in accordance with ASME B16.3 and ASTM A197 standards, this elbow is suitable for non-potable applications such as fuel gas, air, low-pressure steam, and oil systems. Its black oxide coating provides basic corrosion resistance during handling and installation in dry environments.

Performance and Design Features

• ✅ Material: Black malleable cast iron, tested to withstand thermal and mechanical stress.
• ✅ Thread Type: ANSI/ASME B1.20.1 NPT threads for compatibility with standard threaded pipe systems.
• ✅ Connection: Female x Male (street configuration) – eliminates the need for additional nipples or couplings in direction changes.
• ✅ Working Pressure: Matches system rating per schedule and media used; consult applicable codes.
• ✅ Coating: Black oxide finish – suitable for dry, indoor installations where corrosion exposure is minimal.

Technical Specifications

• Nominal Size: 3/8 inch
• Material Standard: ASTM A197 / ASTM A47 (malleable iron)
• Design Standard: ASME B16.3
• Thread Specification: ANSI B1.20.1 NPT

Installation Considerations

Apply PTFE thread sealant or approved pipe dope to ensure a tight seal. Proper alignment and thread engagement are critical to avoid stress cracking or leaks. Use pipe wrenches with care—avoid over-torquing, especially in cast fittings. Not for use in potable water systems unless separately certified as lead-free.

Common Applications

This 3/8 inch street elbow is commonly used in:

• Natural gas and propane piping systems
• Low-pressure steam and condensate return lines
• Hydronic heating and mechanical utility piping
• Industrial compressed air systems

Usage Advisory

Black iron fittings are not suitable for potable water or highly corrosive environments. For exterior or moisture-prone applications, specify galvanized alternatives. Always verify compliance with applicable mechanical or gas codes.