Matco-norca mn-fw3un04 Forged Steel Sw Union CL3000 3/4in

Product Description

The MATCO-NORCA mn-fw3un04 is a forged steel socket weld union rated Class 3000, designed for high-pressure piping systems where a removable, pressure-tight connection is required. The union consists of three pieces — two socket weld ends and a threaded nut — allowing technicians to disconnect and reconnect pipe runs without cutting. Forged steel construction provides the strength and pressure integrity demanded in steam, hydraulic, and industrial process piping. This fitting is sized for 3/4-inch pipe and weighs 1.19 pounds. Licensed pipefitters and plumbers working on high-pressure systems are the primary installers.

This union is suited for 3/4-inch high-pressure piping installations in industrial, commercial, and mechanical room applications. Common uses include steam distribution, hydraulic lines, and compressed-air headers where Class 3000 pressure ratings and permanent socket weld joints are specified. The socket weld design requires fillet welding at the pipe connection points, making this fitting appropriate for all-welded piping systems that also need a break-out union point for future service access.

Key Features

• Class 3000 pressure rating for high-pressure piping service
• Forged steel construction for structural integrity under pressure and temperature cycling
• Socket weld end connections for full-penetration fillet welds
• Three-piece union design allows in-line disconnection without cutting pipe
• 3/4-inch pipe size fits standard Schedule 80 and Schedule 160 piping

Compatibility

Designed as an OEM-style socket weld union for 3/4-inch high-pressure forged steel piping systems rated at Class 3000.

Installation Notes

Installation requires a certified welder or licensed pipefitter working in accordance with applicable codes such as ASME B31.1 or B31.3. Depressurize and drain the system completely before breaking any union or welding near existing pipe. Socket weld fittings require the pipe to be inserted to the socket shoulder and then backed out slightly before welding to allow for thermal expansion during the weld pass. Do not use thread sealants or mechanical connections on the socket weld ends.