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

BLK MAL 90° Elbow – Malleable Iron Fitting for Pressure Piping Systems

The BLK MAL 90 Degree Elbow is a threaded pipe fitting used to create precise 90° changes in direction within fluid or gas transport systems. Manufactured from black malleable cast iron, this elbow is suitable for general-purpose pressure applications, including natural gas, steam, and hydronic systems in both residential and commercial settings.

Each elbow is cast and machined to meet applicable ANSI/ASME B16.3 and B1.20.1 thread standards, ensuring compatibility with a wide range of Schedule 40 and Schedule 80 steel or iron piping. The black finish designates use in non-potable systems and indoor environments where corrosion protection is not externally applied.

Technical and Performance Features

• ✅ Material: Black Malleable Cast Iron per ASTM A197/A197M
• ✅ Connection: NPT Female x Female threads per ANSI/ASME B1.20.1
• ✅ Nominal Angle: 90 degrees for perpendicular directional changes
• ✅ Pressure Class: Rated up to 150 psi steam and 300 psi non-shock cold water, oil, or gas
• ✅ Thread Engagement: Tapered threads allow for mechanical seal when installed with approved thread sealant or PTFE tape

Installation Guidelines

Use pipe wrenches and appropriate thread-sealing compound during installation. Threads must be free from debris and undamaged prior to assembly. Tighten sufficiently to create a secure mechanical seal, but do not over-torque to avoid thread damage or fracture. Follow local plumbing and mechanical code requirements for threaded pressure joints.

Common Use Cases

This fitting is regularly specified in systems requiring directional transitions, including:

• Natural gas and propane distribution
• Closed-loop hydronic heating systems
• Steam supply in commercial equipment installations
• Industrial compressed air lines

Regulatory Note

Black malleable fittings are not intended for potable water supply. For systems requiring lead-free compliance (such as drinking water), use certified lead-free brass or galvanized alternatives that meet NSF/ANSI 61 and 372 standards.

With a robust design and compatibility across threaded pipe systems, the BLK MAL 90° Elbow is a dependable solution for routing pipelines through structural obstacles and confined mechanical spaces. Its durability and mechanical integrity make it a standard component in professional-grade installations.