Crossover Adapter – 6" FIG 206 Female (Thread) x 4" FIG 206 Male (Wing) | Butt Welded, SCH XH

The Crossover Adapter, 6" FIG 206 Female (Thread) x 4" FIG 206 Male (Wing), is a massive, heavy-duty fabricated flowline component engineered to safely handle extreme-volume step-down sizing transitions within 2,000 PSI low-pressure fluid transfer systems. Utilizing a highly durable Butt Welded Schedule XH (Extra Heavy) pipe construction, this large-bore adapter allows field operators to step down from massive 6-inch main lines directly into standard 4-inch equipment.

In large-scale surface operations, adapting massive 6-inch mud tank suction lines or main fluid return headers down to 4-inch distribution lines is a frequent necessity. By bridging this significant gap in bore size with a single integral welded fitting, this adapter eliminates the hazardous need to stack multiple threaded bell reducers and swages. This streamlined solution vastly accelerates the rig-up process, minimizes the overall footprint, and drastically reduces potential leak paths in high-vibration systems.

The 6" FIG 206 end provides a precision-machined female thread (sub) connection designed to safely seat a 6-inch 206 male wing profile. Conversely, the 4" FIG 206 end features a standard low-pressure 4-inch male wing configuration complete with a heavy-duty wingnut and the signature FIG 206 O-ring seal for reliable, bubble-tight fluid transfer. The entire butt-welded assembly is rated for a continuous 2,000 PSI cold working pressure (2K CWP).

Features & Benefits

• Butt Welded SCH XH Construction: Fabricated using premium Schedule XH (Extra Heavy) pipe for superior structural integrity, extreme vibration resistance, and longevity in massive-volume abrasive fluid transfer applications.

• Massive Step-Down Transition: Seamlessly drops pipe diameter from a high-capacity 6-inch main line down to a 4-inch line in one single, rigid assembly.

• Female x Male Configuration: Features a precision 6-inch 206 threaded sub on one end and a heavy-duty 4-inch 206 wingnut on the other, ideal for direct integration into existing low-pressure setups.

• O-Ring Sealed Profile: The 4-inch FIG 206 male end incorporates a primary O-ring seal, ensuring reliable fluid containment even in high-suction or low-pressure fluid transfer environments.

• Reduced Leak Paths: Replacing hazardous "stacked" threaded fittings with a single butt-welded assembly drastically reduces potential failure points and minimizes maintenance downtime.

Specifications & Technical Details

Applications

This welded 6-inch to 4-inch crossover adapter is widely used in large-scale surface operations where transitioning from massive 6-inch, 2,000 PSI low-pressure systems into 4-inch manifolds is required. Typical applications include massive mud tank suction lines, high-capacity fluid return headers, cement mixing manifolds, extreme-volume water transfer systems, and general large-bore flowline operations.

Quality Assurance

All our welded crossover adapters are fabricated by certified welders using premium alloy steel and subjected to strict quality control processes. Each fabricated fitting undergoes rigorous weld inspection and hydrostatic pressure testing prior to shipment to ensure absolute safety, shell integrity, and seal performance under working loads. Full material traceability is available to guarantee compliance with API guidelines.

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