3" Fig 1502 Butt Weld (Sch XXH) Hammer Union – Oil & Gas Flowline Fitting

The 3" Figure 1502 Butt Weld Schedule XXH Hammer Union is an extreme-duty, high-capacity flow control assembly engineered for permanent, maximum-security fluid routing in the most severe upstream oil and gas operations. Rated for an immense 15,000 PSI Cold Working Pressure (15M CWP), this highly resilient, large-bore hammer union provides a dependable, fast-makeup connection between welded 3-inch piping systems. Featuring precision-machined Butt Weld ends designed for Schedule XXH (Double Extra Heavy) pipe, this union is specifically built for heavy-duty applications requiring maximum wall thickness to combat severe internal erosion, extreme pressure pulsations, and massive volumes of highly abrasive fracturing fluids.

Unlike threaded unions, this Figure 1502 assembly allows for a permanent, full-penetration welded integration into high-pressure pipework. This effectively eliminates the risk of thread-related leaks, galling, or backing-off caused by the severe vibration and mechanical loads typical of massive multi-pump fracturing operations. The large 3-inch Double Extra Heavy (XXH) profile provides incredible flow capacity alongside an extended operational lifespan by offering a superior erosion allowance, making it the premier choice for large-scale permanent frac iron and heavy cementing manifolds.

Manufactured from premium high-strength forged alloy steel, the union features a specialized, replaceable lip-type elastomeric seal ring that fits securely into the female sub. This primary seal effectively protects the secondary metal-to-metal seating surface from abrasive frac sand and corrosive agents, ensuring absolute bubble-tight pressure containment under massive fluid loads. The robust, heavy-duty wing nut design enables fast, tool-free assembly and dismantling of welded large-bore spools in the field, optimizing critical operational efficiency.

Features & Benefits

• 15,000 PSI Pressure Rating (15M): Engineered to safely manage extreme ultra-high-pressure fluid systems with a 15,000 PSI Cold Working Pressure rating.

• Butt Weld Connection (Sch XXH): Precision-beveled ends designed for Schedule XXH (Double Extra Heavy) pipe provide maximum wall thickness, offering superior resistance to abrasive erosion and severe vibration.

• High Flow Capacity: The massive 3-inch bore safely accommodates the high-volume fluid transfers required for modern severe-service fracturing applications.

• Replaceable Lip-Type Seal: Features a resilient elastomeric seal ring that provides a dependable primary barrier, minimizing turbulence and protecting metal seating surfaces from aggressive fluids.

• Dual Sealing Mechanism: Combines the primary elastomer seal with a precision-machined secondary metal-to-metal seat for ultimate, leak-free pressure containment.

• Forged Alloy Steel Construction: Built from heavy-duty forged alloy steel to deliver exceptional durability and resistance against severe mechanical impacts and high-velocity flows.

• Rapid Spool Makeup: The heavy-duty wing nut allows for quick, ultra-secure connections and disconnections between permanent welded large-bore pipe spools in the field.

Specifications & Technical Details

Applications

This ultra-high-pressure 3" Figure 1502 Schedule XXH butt weld hammer union is essential for upstream operations requiring massive flow capacities, extreme erosion resistance, and maximum structural rigidity. Typical applications include the fabrication of heavy-duty permanent frac iron, highly abrasive large-bore pump discharge lines, high-capacity truck-mounted cementing manifolds, high-pressure acidizing networks, and general oilfield fluid routing where Double Extra Heavy welded connections are required for maximum safety and longevity under 15,000 PSI pressure.

Quality Assurance

Each hammer union assembly undergoes rigorous quality control protocols, including severe hydrostatic testing, precision dimensional verification of the weld bevels, full material traceability (MTRs), and compliance with strict industry manufacturing standards to ensure complete structural integrity, exceptional erosion allowance, and safe pressure containment.

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