High-Capacity LSAW Steel Pipes: Engineered for Heavy-Duty Pipeline & Structural Systems.
Longitudinal Submerged Arc Welded (LSAW) Pipes: API 5L-Compliant Performance.
Designed for high-pressure fluid transport and mega-structural projects, our LSAW pipes feature single-seam longitudinal welding with OD ranges from 16″ (406mm) to 56″ (1422mm). Wall thicknesses span 6.4–44.5mm (0.25″–1.75″) to handle working pressures up to 25 MPa (3,625 psi). ASTM A53 Grade B/C pipes achieve 415–550 MPa tensile strength – ideal for oil/gas transmission and bridge pylons.
Key Specifications & Certifications
| Parameter | Details |
|---|---|
| Standards | API 5L PSL2, ASTM A53 Gr.B/C, EN 10219, ISO 3183 |
| Grades | X42 (290 MPa), X60 (415 MPa), X70 (485 MPa) |
| End Prep | Beveled (30°–37.5° per ASME B16.25), threaded (API 5B), or square-cut |
| Coatings | 3PE (3-layer polyethylene), FBE (fusion-bonded epoxy), or bare mill finish |
Certifications:
- ISO 9001:2015 QMS
- API Monogram License (5L/5CT)
- NACE MR0175 for sour service (H₂S ≤20 ppm)
Dimensional Chart & Load Capacities
Standard Sizes (OD/Wall Thickness)
| OD (Inch/mm) | 6.4mm | 12.7mm | 19.1mm | 25.4mm | 44.5mm | Max Pressure (psi) |
|---|---|---|---|---|---|---|
| 16″ (406.4) | ✓ | ✓ | ✓ | ✓ | ✓ | 2,840 |
| 20″ (508) | – | ✓ | ✓ | ✓ | ✓ | 3,750 |
| 56″ (1422) | – | – | ✓ | ✓ | ✓ | 6,200 |
Weight Calculation:
- 16″×12.7mm: 129.3 kg/m | 20″×25.4mm: 298.4 kg/m
- Formula: (OD – WT) × WT × 0.02466 = kg/m
Material Chemistry & Mechanical Properties
| Grade | C% Max | Mn% | P% Max | S% Max | Yield (MPa) | Tensile (MPa) |
|---|---|---|---|---|---|---|
| X42 | 0.22 | 1.30 | 0.025 | 0.015 | 290 | 415–565 |
| X70 | 0.16 | 1.65 | 0.020 | 0.010 | 485 | 570–760 |
| A53C | 0.25 | 0.95 | 0.050 | 0.045 | 240 | 415–515 |
Post-Weld Treatment:
- Normalizing: 900–925°C (1,652–1,697°F) for stress relief
- UT Inspection: Per AWS D1.1, sensitivity ≥Φ3.2mm defects
Applications by Industry
- Oil & Gas:
- Transmission Lines: 36″ X70 LSAW pipes (API 5L PSL2) for 1,500 psi natural gas.
- Piling: 56″×44.5mm pipes for offshore platform foundations.
- Civil Engineering:
- Bridge Supports: 20″ A53C pipes with FBE coating (ASTM A795).
- Water Infrastructure:
- Penstocks: 48″×19.1mm 3PE-coated pipes (AWWA C200).
Competitive Advantages
- MOQ: 50 tons (cut/beveling services available)
- Lead Time: 30–45 days (12m lengths ship in 20 days)
- Testing: Hydrostatic (1.5×MAOP), Charpy impact (-20°C), hardness (HRC 22 max)
Packing And Delivery
