3" Fig 1502 NPST Pup Joint (M x F) – 1 FT | High-Pressure Flowline Pipe

The 3" Figure 1502 NPST (Non-Pressure Seal Thread) Pup Joint (1 FT) is an ultra-compact, high-pressure flowline component engineered for safely transporting high-volume, high-velocity, abrasive fluids in demanding upstream operations. Measuring just 1 foot in length, this highly specialized short pipe segment is absolutely essential for making precise micro-adjustments in pipeline spacing, bridging extremely tight gaps between large-bore equipment, and seamlessly connecting adjacent valves within confined 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 in tight 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 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 in confined areas, this compact 1-foot NPST pup joint delivers outstanding structural integrity and exact 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.

• Ultra-Short 1-Foot Length: Provides the exact minimal reach required for tight spacing adjustments and connecting large-bore manifold components that are in close physical proximity.

• 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 (1 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, ultra-compact connections in standard severe-service frac iron spreads, heavy-duty cementing networks, high-pressure flowback operations, and any everyday fluid routing where a secure, 1-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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