Welded Pipeline Reinforcement Solution
Api 5l gr.
Welded Pipeline Reinforcement Solution
Api 5l gr. b half repair sleeves provide permanent welded reinforcement for damaged pipelines, restoring strength and integrity in corrosive or high-pressure environments.
API 5L Grade B is a carbon steel specification developed by the American Petroleum Institute (API) for use in pipeline transportation systems for petroleum and natural gas industries. It includes both seamless and welded pipe forms, with different levels of technical requirements under PSL1 and PSL2.
The PSL2 grade requires enhanced mechanical properties and stricter testing compared to PSL1, making it suitable for more critical applications, including sour service environments.
| Element | PSL1 | PSL2 |
|---|---|---|
| Carbon (C) | ≤ 0.28% (seamless), ≤ 0.26% (welded) | ≤ 0.24% (seamless), ≤ 0.22% (welded) |
| Manganese (Mn) | ≤ 1.20% | ≤ 1.20% / ≤ 1.40% |
| Phosphorus (P) | ≤ 0.030% | ≤ 0.025% |
| Sulfur (S) | ≤ 0.030% | ≤ 0.015% |
| Silicon (Si) | — | ≤ 0.45% |
| Cr, Cu, Ni | Each ≤ 0.50% | — |
| Mo | ≤ 0.15% | — |
| Nb + V + Ti | ≤ 0.15% | Each ≤ 0.05% |
| Property | PSL1 | PSL2 |
|---|---|---|
| Yield Strength | ≥ 245 MPa (35,500 psi) | 245 – 450 MPa |
| Tensile Strength | ≥ 415 MPa (60,200 psi) | 415 – 760 MPa |
| Elongation | ≥ 35% | Variable |
| Yield / Tensile Ratio | — | Max 0.93 |
| Charpy V-Notch | — | ≥ 27 J (at 0°C) |
| Parameter | Specification |
|---|---|
| Outer Diameter (OD) | 1/2" to 60" |
| Wall Thickness | SCH 20 to SCH 160 |
| Length | SRL (5–7m), DRL (10–12m), 20ft, 40ft |
| Manufacturing Types | Seamless, ERW, LSAW, SSAW |
| Product Levels | PSL1 (Basic), PSL2 (Enhanced) |
| Sour Service Option | Available (NACE MR0175 compliant) |
| Test Type | Applicable Grade |
|---|---|
| Hydrostatic Test | PSL1 / PSL2 |
| Bend & Flattening Test | PSL1 / PSL2 |
| Guided-Bend Test | PSL2 |
| Drop-Weight Tear Test (DWT) | PSL2 |
| Charpy Impact Test | PSL2 |
Repairs without service interruption
Supports a wide range of pipe sizes
Circumferential protection for curved zones
Round-the-clock technical assistance
A Half Pipe Sleeve, also known as a split casing or half wrap, is a critical component in modern pipeline maintenance and repair. These engineered sleeves reinforce and repair pipelines without requiring system shutdown.
Reinforces pipelines without shutdown, offering secure and durable repair for various defects.
Longitudinally split for easy installation without removing the pipeline or disrupting service.
Tailored to specific sizes for a precise fit and secure application on-site.
Absorbs thermal expansion and pipeline movement without cracking or loosening.
Ideal for leaks, dents, cracks, corrosion, defective welds, and structural anomalies.
Prolongs pipeline life cost-effectively, avoiding total pipeline replacement.
Comprehensive specifications for half pipe sleeves including materials, dimensions, and performance parameters for various industrial applications.
| Material Grade | Standard | Yield Strength | Tensile Strength | Applications |
|---|---|---|---|---|
| API 5L Grade B | API 5L PSL1/PSL2 | 245 MPa | 415 MPa | General pipeline applications |
| API 5L X42 | API 5L PSL1/PSL2 | 290 MPa | 415 MPa | Medium pressure pipelines |
| API 5L X52 | API 5L PSL1/PSL2 | 360 MPa | 460 MPa | High pressure transmission |
| ASTM A36 | ASTM A36 | 250 MPa | 400 MPa | Structural applications |
| ASTM A516 Gr.70 | ASTM A516 | 260 MPa | 485 MPa | Pressure vessel quality |
| ASTM A572 Gr.50 | ASTM A572 | 345 MPa | 450 MPa | High-strength low-alloy |
| Parameter | Range | Standard Options | Custom Options |
|---|---|---|---|
| Inside Diameter | 3.5″ – 64″ | 4", 6", 8", 10", 12", 16", 20", 24" | Any size per requirements |
| Length | 100mm – 3000mm | 1000mm, 1500mm, 2000mm | Custom lengths available |
| Wall Thickness | 5/16″ – 3/4″ | 3/8", 1/2", 5/8" | Based on pressure requirements |
| Coverage Angle | 185° per half | 370° total coverage | Complete circumferential |
| Edge Preparation | 30° bevel | Beveled for welding | Square-cut available |
-29°C to 400°C
(-20°F to 752°F)
ANSI 300–1500
Equal to carrier pipe
18–23% minimum
Superior ductility
Advanced manufacturing processes ensure consistent quality and optimal performance of half pipe sleeves for critical pipeline applications.
High-grade steel materials undergo chemical analysis (ASTM A751). Surface inspection and conditioning ensure optimal quality prior to forming.
Steel plates are cold-formed via precision rolling, die forming, or brake press to maintain dimensional accuracy and material integrity.
Longitudinal edges are beveled at 30° using precision machining to facilitate weldability and structural continuity in pipeline installation.
Inspections include tensile (ASTM A370), Charpy impact, bend testing, and dimensional/visual checks to meet strict project specifications.
Quality management system
B31.4, B31.8, PCC-2 compliance
API 5L, API 1104 certified
Comprehensive mechanical & chemical tests
Comprehensive advantages of implementing half pipe sleeves for pipeline maintenance and repair operations.
Install on pressurized, in-service pipelines without system shutdown, eliminating costly service interruptions and maintaining continuous operations.
Quick installation process completed in hours rather than days or weeks, minimizing operational disruption and reducing project timelines.
Significantly lower costs compared to pipeline replacement, including reduced material, labor, and operational expenses.
Restore full structural strength of original pipeline, allowing continued operation at design pressures and temperatures.
Accommodate pipeline movement, thermal expansion, and ground settlement without failure through superior material properties.
Minimal excavation reduces environmental impact, soil displacement, and habitat disruption compared to traditional replacement methods.
Repair various pipeline defects including corrosion, cracks, dents, manufacturing defects, and mechanical damage.
Significantly extend operational life of aging pipeline infrastructure, maximizing return on infrastructure investments.
Custom-fabricated designs for specific applications with tailored materials, dimensions, and performance characteristics.
Half pipe sleeves ensure pipeline safety across critical sectors including oil & gas, power, and chemical processing—offering structural reinforcement without shutdown.
Protects pipelines in transmission, refining, and offshore facilities under high pressure and corrosive conditions.
Used in municipal and industrial systems for leak repairs, corrosion mitigation, and structural reinforcement.
Reinforces steam and condensate pipelines in fossil, nuclear, and biomass plants where pressure integrity is critical.
Withstands aggressive media and high temperatures in chemical transport and processing lines.
Protects lines carrying abrasive slurry and tailings from rapid erosion, reducing downtime in mining operations.
Applied in heating networks, district cooling, and buried pipelines where excavation is limited.
Half repair pipe sleeves provide welded reinforcem...
The half sleeves repair system offers permanent we...
Steel repair sleeves are welded over damaged pipe ...
