4" Fig 1502 Integral Pup Joint (M x F) – 6 FT | High-Pressure Flowline Pipe

The 4" Figure 1502 Integral Pup Joint (6 FT) is a massive, extreme-pressure flowline component engineered for safely transporting ultra-high-volume, high-velocity, abrasive fluids in the most demanding large-bore upstream operations. Measuring exactly 6 feet in length, this highly versatile straight pipe segment provides an extended mid-range reach, making it essential for adjusting pipeline distances, bridging moderate gaps between large-capacity pumping equipment, and seamlessly connecting components within heavy-duty frac manifolds. Rated for a massive 15,000 PSI Cold Working Pressure (15M CWP), it provides an ultra-secure, leak-free conduit for critical, large-volume fluid routing in severe-service stimulation environments.

What defines this large-bore pup joint is its strictly Integral construction. Instead of welding union ends onto a section of pipe or relying on mechanical threads, this entire 4-inch by 6-foot joint is precision-machined from a single, massive solid billet of premium high-strength forged alloy steel. This seamless, weld-free design completely eliminates the risk of weld fatigue, heat-affected zone failures, and catastrophic stress cracking under extreme vibration and pressure pulsations, delivering absolute ultimate reliability for high-rate, large-bore hydraulic fracturing and flowback operations.

Configured with industry-standard Figure 1502 Male (Wing) x Female (Thread) hammer union ends, this pup joint ensures rapid, secure rig-up. The Female end houses the hallmark Fig 1502 replaceable lip-type elastomeric seal, which acts as a primary barrier to protect the secondary metal-to-metal seating surfaces from severe abrasive wash-out caused by high-velocity proppant. Designed for maximum longevity and massive fluid capacity, this robust 6-foot integral pup joint delivers unparalleled structural integrity and pressure containment for heavy-duty well servicing operations.

Features & Benefits

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

• Large 4-Inch Bore: Accommodates massive flow rates and heavy, abrasive proppant slurries while drastically minimizing flow turbulence, fluid friction, and internal erosion.

• 100% Integral Construction: Machined from a single solid piece of forged alloy steel, completely eliminating weld joints for maximum structural rigidity and fatigue resistance over a 6-foot span.

• Extended 6-Foot Length: Provides an optimal mid-to-long range reach required for spacing adjustments and safely spanning moderate distances between large manifold components.

• Male (Wing) x Female (Thread) Connections: Features standard Fig 1502 hammer union ends for fast, seamless, and highly secure integration into existing 15M large-bore flowline networks.

• Leak-Free Sealing: Utilizes precision-machined metal-to-metal seats combined with resilient lip-type elastomeric seals for ultimate, bubble-tight pressure containment.

Specifications & Technical Details

Applications

This extreme-pressure, large-bore 4" Figure 1502 Integral Pup Joint (6 FT) is an absolutely critical asset for upstream operations requiring maximum flowline capacity and versatile spacing capability. Typical applications include constructing high-rate frac iron spreads ("big iron"), precise spacing alignments on high-volume choke-and-kill manifolds, large-scale cementing networks, high-pressure flowback operations, and any critical fluid routing where a highly secure, 6-foot 15,000 PSI connection is mandated to move massive volumes of fluid.

Quality Assurance

Each integral pup joint undergoes rigorous quality control protocols, including severe hydrostatic pressure testing, complete dimensional verification, ultrasonic thickness (UT) testing to ensure bore concentricity along its 6-foot length, magnetic particle inspection (MPI) on the union ends, and full material traceability (MTRs) to guarantee fail-safe structural integrity and compliance with strict API standards.

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