Premium Black Malleable Iron Reducing Socket (ASME B16.3 and ASTM A197 Compliant)
Engineered specifically for heavy-duty natural gas, LP (liquid propane), and commercial piping networks, our Premium Black Malleable Iron Reducing Sockets provide a reliable, high-strength connection to transition between two pipes of different diameters. Manufactured from high-strength cupola malleable iron, these threaded straight fittings are built to handle intense system pressures, physical vibration, and constant mechanical stress.
Featuring precision-cut internal National Pipe Taper (NPT) threads on both ends, these reducing sockets ensure an exceptionally tight mechanical wedge fit when paired with standard schedule 40 black steel pipes. Every fitting is factory pressure-tested to guarantee zero wall porosity, offering ultimate safety behind walls or overhead in plenum spaces.
Key Features and Benefits
Heavy-Duty Malleable Iron Construction: Cast from premium ASTM A197 cupola malleable iron, delivering excellent tensile strength and fatigue resistance. It will not crack or fracture under heavy pipe wrench installation torque.
Smooth Diameter Transition: Features a tapered internal profile that changes sizes cleanly, minimizing fluid restriction and turbulence while maintaining proper line pressure across the size change.
Precision-Tapered NPT Threads: CNC-machined to strict ASME B1.20.1 standards on both openings. The smooth, deep-cut internal threads allow thread sealants to distribute uniformly, creating a gas-tight seal that completely eliminates bypass leaks.
Naturally Finished Black Coating: Treated with a raw black oxide finish and a light factory oil coat to provide dependable storage protection against atmospheric humidity and oxidation before job-site installation.
Industry Code and Safety Compliant: Meets all dimensional metrics of ASME B16.3 and carries UL Listing and FM Approval, ensuring it fully satisfies strict local municipal mechanical and gas plumbing building codes.
Technical Specifications
Fitting Profile: Concentric Reducing Socket / Threaded Reducing Coupling
Material Standard: ASTM A197 / A197M Cupola Malleable Iron Castings
Dimensional Standard: ASME B16.3 Class 150 Malleable Iron Threaded Fittings
Thread Specification: ANSI / ASME B1.20.1 National Pipe Taper Threads (Large Female to Small Female)
Pressure and Temperature Ratings: Rated for up to 300 PSI at 150 degrees Fahrenheit, or 150 PSI at 300 degrees Fahrenheit
Fluid Compatibility: Natural gas, liquid petroleum (LP) gas, compressed air, oils, and non-potable closed systems (Note: Not for use in domestic potable water lines due to rust risks).
Ideal Applications
Transitioning Gas Supply Headers Down to Smaller Supply Branch Feeds for Individual Appliances
Sizing Down Commercial Propane Distribution Lines to Connect to Appliance Regulators
Adapting Sizes in Overhead Compressed Air Loop Manifolds in Mechanical Workbenches
Connecting Gas Pipeline Infrastructure Loops to Low-Profile Meters and Control Valves
