4" Fig 206 Threaded Hammer Union – Low-Pressure Flowline Fitting

The 4" Figure 206 Threaded Hammer Union is a massive, highly reliable large-bore flow control component engineered for general-purpose, ultra-high-volume fluid routing across upstream, midstream, and industrial applications. Rated for a 2,000 PSI Cold Working Pressure (CWP), this robust hammer union provides a fast-makeup, highly secure connection for massive 4-inch piping systems. Building upon standard low-pressure union designs, the Figure 206 union is distinctly upgraded with a secondary elastomeric O-ring embedded directly into the spherical seating surface of the male sub.

Manufactured from high-strength industrial-grade forged steel, the Figure 206 union utilizes a dual-sealing mechanism. The primary metal-to-metal conical and spherical seating surface is powerfully reinforced by the resilient O-ring, which effectively fills microscopic imperfections and compensates for minor pipe misalignments. This makes the massive 4-inch Figure 206 particularly effective for ultra-high-volume transfer of corrosive fluids, heavy-duty abrasive mud lines, and massive water transfer configurations where achieving a perfect metal-to-metal seal across a large surface area can be challenging.

Equipped with precision-cut female threaded ends (NPT / Line Pipe), this 4-inch union allows for secure, vibration-resistant integration onto standard large-bore threaded pipework. The heavy-duty wing nut allows for rapid, tool-free assembly and dismantling in the field, critically reducing rig-up times while delivering immense flow capacity and enhanced leak prevention for large-scale field and utility operations.

Features & Benefits

• 2,000 PSI Pressure Rating: Engineered to safely manage continuous fluid transfer in standard low-pressure systems with a reliable 2,000 PSI Cold Working Pressure (CWP) rating.

• Secondary O-Ring Seal: Features an elastomeric O-ring embedded in the male sub, providing an enhanced secondary seal that significantly improves leak-free performance, especially in less-than-ideal alignment conditions.

• Ultra-High Flow Capacity: The massive 4-inch nominal bore easily accommodates the immense fluid volumes required for large-scale utility and heavy mud mixing operations.

• Dual Sealing Mechanism: Combines traditional metal-to-metal seating with a resilient O-ring to ensure dependable pressure containment against corrosive or abrasive fluids.

• Rugged Construction: Built from heavy-duty forged steel to withstand general mechanical field handling, harsh weather conditions, and continuous vibration on massive piping setups.

• Threaded Connections: Precision-machined NPT threaded ends ensure a secure, straightforward, and vibration-resistant connection to standard 4-inch threaded line pipe.

• Rapid Makeup Design: The robust wing nut allows for quick, ultra-secure connections and disconnections in the field, optimizing operational efficiency and saving critical rig-up time.

Specifications & Technical Details

Applications

This 4" Figure 206 threaded hammer union is an essential component for reliable, ultra-high-volume fluid systems where an extra layer of seal integrity is desired. Typical applications include heavy-duty, large-bore mud lines, high-capacity water and chemical transfer networks, general rig utility lines, massive pump suction routing, bulk storage tank tie-ins, and general industrial fluid transfer where rapid rig-up and dependable 2,000 PSI containment are strictly required on 4-inch lines.

Quality Assurance

Each hammer union assembly undergoes rigorous quality control protocols, including precision dimensional verification, exact thread gauging, O-ring groove inspection, and full material traceability (MTRs), ensuring complete structural integrity, safe pressure containment, and reliable field performance.

Request a Quote

📞 +1 405 666 5011

📧 seo@blazess.com