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3" 15,000 PSI Fig 1502 Tapped Male Blind Sub with Wing Nut (1/2" NPT) – Oil & Gas Flowline Fitting
3" 15,000 PSI Fig 1502 Tapped Male Blind Sub with Wing Nut (1/2" NPT) – Oil & Gas Flowline Fitting
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The 3" Figure 1502 Tapped Male Blind Sub with Wing Nut and a 1/2" NPT port is a high-pressure closure assembly engineered to cap off and isolate female threaded hubs while providing a secure access point for instrumentation. Rated for a Cold Working Pressure (CWP) of 15,000 PSI, this specialized blind is an essential component for well testing, hydraulic fracturing, and flowback operations where real-time pressure monitoring or controlled depressurization is required.
Manufactured from premium high-strength forged alloy steel, this complete assembly includes the precision-machined male blind sub (featuring the elastomeric seal groove) and the heavy-duty Figure 1502 wing nut. The defining feature of this component is the 1/2" National Pipe Thread (NPT) tap located in the center of the blind sub. This allows operators to install pressure gauges, transducers, or needle valves directly onto the terminal point of the flowline. This setup enables rig crews to monitor trapped pressure or safely bleed off hazardous fluids and gases before breaking the hammer union connection.
Built to endure abrasive frac fluids, intense mechanical vibration, and extreme pressure cycling, the 3" 1502 Tapped Male Blind Sub ensures maximum safety and operational flexibility in the most demanding upstream environments.
Features & Benefits
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Integrated 1/2" NPT Tap: Provides a secure, threaded port for pressure monitoring gauges, sampling equipment, or bleed-off valves.
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Complete Assembly: Comes fully equipped with the male blind sub and heavy-duty wing nut for immediate field deployment.
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15,000 PSI CWP Rating: Specifically engineered to safely handle extreme pressures in critical well-control and stimulation environments.
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Forged Alloy Steel Construction: Delivers exceptional structural strength, resisting fatigue, mechanical impact, and internal erosion.
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Safe Depressurization: Enables operators to bleed off trapped line pressure before disassembly, preventing hazardous high-pressure blowouts.
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Standard Interchangeability: Fully compatible with all industry-standard 3" Figure 1502 female threaded hubs.
Specifications & Technical Details
| Category | Specification |
| Component Type | Tapped Blind Sub Assembly / Flowline Closure Fitting |
| Figure Number | Figure 1502 |
| Size | 3" |
| Pressure Rating | 15,000 PSI CWP (15M) |
| End Connection | 3" Fig 1502 Male (with Wing Nut) |
| Tap Size | 1/2" Female NPT |
| Material | High-Strength Forged Alloy Steel |
| Service Type | Standard Oilfield Service |
| Typical Applications | Frac manifolds, well testing, gauge mounting, bleed-off lines |
| Testing & Compliance | Strict dimensional verification and material traceability |
Applications
This 3" tapped male blind sub with wing nut is essential for operations requiring secure high-pressure flowline termination with instrumentation access. Typical uses include dead-ending female branches on frac manifolds while monitoring line pressure, installing bleed-off valves on well-testing lines, and providing sampling ports on high-pressure pump discharge headers.
Quality Assurance
Each tapped male 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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📧 seo@blazess.com
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