• 4" 15,000 PSI FIG 1502 threaded female blind sub for oilfield flowline equipment, high-pressure flow iron integral fitting used in oil and gas operations for secure line isolation and well testing applications
  • 4" 15,000 PSI Fig 1502 Threaded Female Blind Sub – Oil & Gas Flowline Fitting
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4" 15,000 PSI Fig 1502 Threaded Female Blind Sub – Oil & Gas Flowline Fitting

4" 15,000 PSI Fig 1502 Threaded Female Blind Sub – Oil & Gas Flowline Fitting

$544.00 USD
$652.80 USD $544.00 USD
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The 4" Figure 1502 Threaded Female Blind Sub is a high-capacity, heavy-duty closure fitting designed to securely isolate and terminate the male end of a 4-inch hammer union connection. Rated for a Cold Working Pressure (CWP) of 15,000 PSI, this component is essential for large-bore, high-pressure flowlines used in hydraulic fracturing, well testing, and manifold configurations where absolute fluid containment is required.

Manufactured from premium forged alloy steel, this female blind features the precision-machined external Acme threads characteristic of the Figure 1502 union. It is engineered to mate seamlessly with a 4" 1502 male sub, utilizing the union’s wing nut to pull the sealing surfaces into a blowout-proof, leak-free configuration. This threaded female blind provides a safe and immediate termination point, allowing rig crews to isolate pressurized sections of a high-volume manifold for maintenance or reconfiguration without depressurizing the primary system.

Built to endure extreme mechanical shock, high-velocity vibration, and the erosive forces of abrasive frac fluids, the 4" 1502 Female Blind Sub ensures maximum safety and structural integrity in the most demanding upstream applications.

Features & Benefits

  • 15,000 PSI CWP Rating: Specifically engineered to safely contain extreme pressures in critical high-volume well-servicing environments.

  • Forged Alloy Steel Construction: Delivers superior structural strength and exceptional resistance to fatigue, impact, and internal erosion.

  • Precision Acme Threads: Features industry-standard threads for smooth, reliable engagement with 4" Figure 1502 wing nuts and male subs.

  • Positive Isolation: Provides a secure, blowout-proof dead-end for 4-inch high-pressure fluid and gas lines.

  • Standard Interchangeability: Fully compatible with all industry-standard 4" Figure 1502 hammer union components.

  • Field Efficiency: Enables rapid rig-up and secure flowline termination during high-paced, high-pressure operations.

Specifications & Technical Details

Category Specification
Component Type Blind Sub / Flowline Closure Fitting
Figure Number Figure 1502
Size 4"
Pressure Rating 15,000 PSI CWP (15M)
End Connection 4" Fig 1502 Female (Threaded Hub)
Material High-Strength Forged Alloy Steel
Service Type Standard Oilfield Service (Sour Service options available)
Typical Applications High-volume frac manifolds, well testing, pump discharge lines
Testing & Compliance Strict dimensional verification and material traceability

Applications

This 4" Figure 1502 threaded female blind sub is essential for operations requiring secure high-pressure flowline termination at large diameters. Typical uses include capping off unused branches on high-volume frac manifolds, dead-ending well-testing lines, and securing high-pressure pump discharge headers during stimulation and fracturing support operations.

Quality Assurance

Each female blind sub is manufactured under rigorous quality control protocols. The fitting undergoes precise dimensional inspection, thread gauging, and non-destructive examination (NDE) to guarantee absolute structural integrity and reliable blowout-proof performance under maximum 15,000 PSI operational loads.

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