Pinhole Repair Clamps
Pinhole Repair Clamps by Half Pipe Sleeve are purpose-built solutions for sealing small, pressurized pipeline leaks, specifically pinholes up to 12 mm in diameter – without shutting down flow or cutting the line. Whether you’re handling corrosion damage, mechanical punctures, or localized pipe failure, these clamps offer a fast, high-integrity repair option trusted across the globe.
Featuring a rugged steel body, a tapered elastomer sealing cone, and an internal 360° gasket, each clamp is designed to plug the leak directly while distributing sealing force evenly around the pipe circumference. Installation is simple, safe, and tool-friendly — even underwater or in confined field conditions.
From oil & gas and petrochemicals to waterworks and power generation, Half Pipe Sleeve’s Pinhole Repair Clamps are the go-to choice for critical, in-service leak repairs.
Key Features & Benefits of Pinhole Repair Clamp
A central compression screw and elastomer cone expand into the pinhole to seal it precisely. No welding, cutting, or pipe wall deformation required.
On-Line InstallationInstall clamps on pressurized lines without draining, depressurizing, or interrupting flow — saving both time and operating costs.
High Pressure RatingWithstands up to 150 Bar (2200 psi) when properly torqued. Suitable for everything from 2” utility lines to large transmission pipelines.
Corrosion-Resistant ConstructionMade from ASTM A516 Gr. 70 carbon steel or 304/316 stainless steel, and finished with protective coatings like Xylan®, epoxy, or hot-dip galvanizing for durability in harsh environments.
360° Gasket SealThe inner rubber gasket (NBR, Viton®, or Silicone) creates a full circumferential seal around the leak site — even on aged or uneven surfaces.
Minimal Pipe PreparationJust basic cleaning is needed. No profiling or skilled technicians — even a single field worker can install the clamp using standard tools.
Material & Chemical Composition
Component | Material Specification | Chemical Composition / Properties |
Clamp Body | ASTM A516 Gr.70 Carbon Steel | – Carbon (C): ≤ 0.27% – Manganese (Mn): 0.79–1.30% – Phosphorus (P): ≤ 0.035% – Sulfur (S): ≤ 0.035% – Yield Strength: ≥260 MPa – Tensile Strength: 485–620 MPa – Elongation: ≥21% |
Optional: SS 304 / SS 316 | Excellent corrosion resistance; ideal for marine or chemical environments | |
Bolts & Nuts | ASTM A193 B7 / A194 2H | – Tensile Strength: ≥860 MPa – Yield Strength: ≥720 MPa – Coated: Zinc, PTFE, or Xylan® for anti-galling and corrosion protection |
Sealing Cone (Plug) | Nitrile Rubber (NBR) | – Temp Range: -20°C to +100°C – Resistant to oil, water, and fuels |
Optional: Viton® (FKM) | – Temp Range: -20°C to +300°C – Ideal for hydrocarbons and aggressive chemicals | |
Optional: Silicone Rubber | – Temp Range: -50°C to +200°C – Used in food-grade and extreme cold environments | |
Inner Gasket Liner | NBR / Viton® / Silicone (matches cone) | Reinforced with optional SS inserts; creates leak-tight seal even with pipe pitting |
Coating (Clamp Body) | Epoxy / Xylan® / Hot-Dip Galvanized | Long-lasting protection from corrosion, chemicals, and weather exposure |
Technical Specifications
- Pipe Sizes: 2” to 48” outer diameter (OD)
- Leak Coverage: Up to 12 mm (0.5 inch) pinhole size
- Pressure Rating: Up to 150 Bar (15 MPa)
- Temperature Range: -50°C to +300°C (depending on seal material)
- Installation Time: Typically 10–15 minutes
- Weight Range: ~1 kg (for 2”) to ~8+ kg (for 36”)
Installation Steps
- Clean the pipe surface around the leak
- Place the clamp over the leak using guide pin
- Insert and torque the sealing cone screw
- Tighten bolts evenly in criss-cross pattern
- Inspect for leaks and confirm a pressure-tight seal
No heavy equipment, hot work, or flow isolation required.
Applications
- Oil & Gas pipelines (onshore/offshore)
- Petrochemical and refineries
- Municipal water systems
- Steam and condensate pipelines
- Subsea infrastructure
- Emergency pipeline repair kits
Why Choose Half Pipe Sleeve’s Pinhole Repair Clamps?
- Quick emergency fix on live pipelines
- Cost-effective vs welding or pipe replacement
- Reliable under pressure in tough conditions
- Usable underwater or in tight access areas
- Compact and easy to stock for field crews
Contact for Pipe repaire Leak.
For more details on the products contact us.
Half Pipe Sleeve, Half Repair Pipe Sleeve, Pre-Stressed Metallic Sleeve.