3" Fig 1502 NPST Pup Joint (M x F) – 8 FT | High-Pressure Flowline Pipe

The 3" Figure 1502 NPST (Non-Pressure Seal Thread) Pup Joint (8 FT) is a highly versatile, high-pressure flowline component engineered for safely transporting high-volume, high-velocity, abrasive fluids in demanding upstream operations. Measuring a substantial 8 feet in length, this straight pipe segment provides an extended reach, making it essential for spanning larger distances across the well pad, bridging significant gaps between pumping equipment, and seamlessly connecting distant valves within large manifold iron spreads. Rated for a massive 15,000 PSI Cold Working Pressure (15M CWP), it provides an ultra-secure conduit for critical, high-volume fluid routing while reducing the overall number of connections required in longer severe-service runs.

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 1502 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 15,000 PSI operations.

Configured with industry-standard Figure 1502 Male x Female (M x F) hammer union ends, this pup joint ensures rapid, tool-free rig-up using a standard lead hammer. The Female end houses the hallmark Fig 1502 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, this extended 8-foot NPST pup joint delivers outstanding structural integrity and flexible, long-reach spacing capability.

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.

• 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.

• Extended 8-Foot Length: Provides an optimal long-range reach required for spanning greater distances safely between manifold components, minimizing total union connections on the pad.

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

• Cost-Effective Durability: Offers a slightly lighter and more economical alternative to solid integral pup joints while maintaining extreme-pressure structural safety.

• 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 3" Figure 1502 NPST Pup Joint (8 FT) is a critical asset for standard upstream operations requiring reliable flowline strength and extended-reach spacing. Typical applications include spanning large gaps on high-volume choke-and-kill manifolds, reliable long connections in standard severe-service frac iron spreads, heavy-duty cementing networks, high-pressure flowback operations, and any everyday fluid routing where a secure, 8-foot 15,000 PSI connection is required.

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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