2-1/2 inch Black Iron 90 Degree Elbow Female x Female

2-1/2" Black Malleable Iron 90° Elbow – Threaded Fitting for Directional Changes

The 2-1/2" Black Malleable Iron 90-Degree Elbow is designed to facilitate right-angle changes in direction for threaded steel piping systems. Manufactured to ANSI/ASME B16.3 standards, this elbow features female National Pipe Thread (NPT) ends and is rated for use in steam, gas, oil, and air systems operating under appropriate pressure and temperature conditions.

Constructed from durable black malleable iron, this elbow is suitable for both new installations and maintenance work in non-potable systems. The black oxide finish provides limited protection during handling and storage and serves as a material identifier for use in gas and hydronic applications. Not intended for use in potable water systems or corrosive environments unless properly coated or lined.

Key Technical Specifications

• Material: ASTM A197 malleable iron
• Size: 2-1/2" nominal pipe size
• Type: 90-degree elbow with female NPT ends
• Standards: ANSI/ASME B16.3, UL and FM listed for applicable systems
• Pressure Rating: Typically rated to 150 PSI for steam; verify for specific media

Functional Advantages

• ✅ Threaded Connection – Female NPT ends allow direct threading to standard Schedule 40 or 80 steel pipe
• ✅ Reliable Joint Integrity – Designed to maintain seal under vibration and thermal cycling when installed with approved sealant
• ✅ Resistant to Mechanical Stress – Cast structure provides dimensional stability and strength in high-load environments
• ✅ Standard Compliance – Engineered and tested to meet national code requirements for pressure piping systems

Installation Considerations

This elbow must be installed using a calibrated pipe wrench and compatible thread sealant (e.g., PTFE tape or thread compound). Threads should be clean and inspected for damage prior to assembly. Proper engagement and torque must be observed to maintain a leak-free joint without overstressing the fitting body or pipe ends.

Typical Applications

Used extensively in commercial and industrial mechanical systems, the 2-1/2" black iron elbow is specified in gas distribution piping, boiler room assemblies, low-pressure steam networks, fuel oil lines, and compressed air layouts. It is also commonly applied in fabricated headers and manifold branches requiring 90-degree transitions with reduced field welding.

Code & Performance Notes

These fittings are compliant with the mechanical code for ferrous piping and are recognized in the International Mechanical Code (IMC), NFPA 54 (Fuel Gas Code), and applicable state plumbing and building codes for use in non-potable applications. Pressure and temperature limitations vary depending on media type—consult product data sheets for precise values.

The 2-1/2" Black Iron 90° Elbow delivers dependable directional control in threaded piping systems and is engineered for systems requiring robust, non-welded connections in high-demand environments.