4" ANSI 300# x 3" Fig 206 Male Wing Flange Adapter, Butt Welded Sch XH – Oil & Gas Flowline Fitting

The 4" ANSI 300# x 3" Fig 206 Male Wing Flange Adapter is a highly durable size-reducing crossover component designed to rapidly and reliably connect standard facility piping with temporary flowlines. Engineered for efficient fluid transfer in upstream, midstream, and industrial operations, this adapter effectively bridges a permanent 4-inch ANSI Class 300 flanged connection down to a standard 3-inch Figure 206 hammer union interface. The integrated 3-inch male wing nut enables fast, tool-free makeup in the field, critically reducing rig-up times for temporary fluid routing or transfer systems.

Unlike standard single-piece forged adapters, this crossover utilizes a heavy-duty butt-welded construction featuring Schedule XH (Extra Heavy) wall thickness. The thick-walled Schedule XH piping provides superior structural rigidity, erosion resistance, and longevity when handling abrasive fluids, mud, and continuous flow operations. The high-integrity butt-weld integration ensures a smooth internal flow bore, minimizing turbulence and pressure drops across the size transition.

The Figure 206 male union connection incorporates an embedded secondary O-ring seal, providing enhanced leak-free performance even in less-than-ideal alignment conditions. Serving as a robust interface between permanent facility infrastructure and temporary hoses or piping, this welded male wing flange adapter optimizes layout flexibility while maintaining rigorous structural safety. (Note: The maximum working pressure of the assembly is governed by the ANSI Class 300 flange rating).

Features & Benefits

• Rapid Makeup Design: Features an integrated 3" Figure 206 Male Wing Nut for quick, ultra-secure hammer union connections without specialized tools.

• Butt-Welded Construction: High-integrity, full-penetration butt weld ensures a smooth internal transition and exceptional structural strength.

• Schedule XH Wall Thickness: Constructed with Extra Heavy (XH) piping to provide superior resistance against internal wear, abrasion, and fluid degradation.

• Seamless Size Transition: Efficiently steps down fluid flow from a larger 4-inch ANSI Class 300 facility pipe to a standard 3-inch temporary line.

• Secondary O-Ring Sealing: The Figure 206 male connection utilizes an embedded O-ring for superior, leak-tight sealing in fluid and mud applications.

• Optimized Flow: The matched bore and welded design reduce flow turbulence and minimize the risk of localized erosion during heavy fluid routing.

Specifications & Technical Details

Applications

This butt-welded Schedule XH flange adapter is essential for operations requiring a secure, durable, and size-reducing transition between permanent facility piping and temporary flowline equipment. Typical applications include midstream facility tie-ins, heavy-duty mud mixing networks, high-volume water transfer stations, suction lines, and standard industrial pump connections where rapid rig-up and continuous flow are required.

Quality Assurance

Each butt-welded crossover adapter undergoes stringent quality control protocols. This includes rigorous Non-Destructive Testing (NDT) on all welds, precise dimensional and wing nut gauging, flange facing inspection, and material verification, ensuring safe, leak-free, and reliable field performance.

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