4" Fig 1002 NPST Pup Joint (M x F) – 2 FT | 10,000 PSI Flowline Pipe

The 4" Figure 1002 NPST (Non-Pressure Seal Thread) Pup Joint (2 FT) is a heavy-duty, large-bore flowline component engineered for safely transporting high-volume abrasive fluids, cementing slurries, and fracturing proppants in demanding upstream operations. Measuring exactly 2 feet in length, this highly specialized short pipe segment is absolutely essential for making precise, short-span adjustments in pipeline spacing, bridging tight gaps between large-capacity equipment, and seamlessly connecting adjacent valves within confined manifold spreads. Rated for a highly secure 10,000 PSI Cold Working Pressure (10M CWP), it provides an ultra-reliable conduit for critical, large-volume fluid routing in compact spaces.

What differentiates this pup joint is its highly efficient NPST (Non-Pressure Seal Thread) construction. Rather than being machined from a single solid billet like an integral joint, this pup joint is fabricated by threading premium, heavy-wall seamless steel tubing into forged alloy steel Figure 1002 union ends. A specialized internal elastomeric O-ring is utilized between the pipe end and the union sub to create the actual pressure seal. By ensuring the mechanical threads do not hold fluid pressure, the NPST design completely eliminates the risk of thread wash-out and fluid bypass. This offers a highly reliable, slightly lighter, and more cost-effective alternative to integral pup joints, perfectly suited for standard 10,000 PSI large-bore operations.

Configured with industry-standard Figure 1002 Male (Wing) x Female (Thread) hammer union ends, this pup joint ensures rapid, tool-free rig-up using a standard lead hammer. The Female end houses a replaceable lip-type elastomeric seal, acting as a primary barrier to protect the secondary metal-to-metal seating surfaces from severe abrasive damage. Designed for everyday high-pressure use in confined areas, this compact 2-foot NPST pup joint delivers outstanding structural integrity and exact short-span spacing capability for large-volume pumping.

Features & Benefits

• 10,000 PSI Pressure Rating (10M): Engineered to safely manage extreme high-pressure, high-volume fluid systems with a highly reliable 10,000 PSI Cold Working Pressure rating.

• Large 4-Inch Bore: Accommodates massive flow rates and highly abrasive slurries while minimizing flow turbulence and fluid erosion.

• NPST Construction: Features Non-Pressure Seal Thread fabrication, keeping high-pressure fluid off the mechanical threads to prevent wash-out and ensure leak-free performance.

• Compact 2-Foot Length: Provides the exact minimal reach required for short spacing adjustments and connecting large-bore manifold components that are in close physical proximity.

• Male (Wing) x Female (Thread) Connections: Features standard Fig 1002 hammer union ends for fast, seamless, and highly secure integration into existing 10M 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 high-pressure, large-bore 4" Figure 1002 NPST Pup Joint (2 FT) is a critical asset for standard upstream operations requiring reliable flowline strength in confined areas. Typical applications include precise spacing alignments on high-volume choke-and-kill manifolds, short connections in cementing arrays, high-rate stimulation and fracturing spreads, heavy-duty flowback operations, and any everyday fluid routing where a secure, 2-foot 10,000 PSI connection is required to handle large fluid volumes.

Quality Assurance

Each NPST pup joint undergoes rigorous quality control protocols, including severe hydrostatic pressure testing to verify the internal O-ring seal integrity, complete dimensional verification, magnetic particle inspection (MPI) on the union ends, and full material traceability (MTRs) to guarantee fail-safe structural integrity and compliance with strict oilfield standards.

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