Premium LSAW & SAWL Pipe (Welded Steel Pipe)
Our LSAW (Longitudinal Submerged Arc Welding) and SAWL pipes are manufactured using advanced JCOE and UOE forming technologies, offering exceptional strength, thick walls, and large diameters. They are engineered to withstand harsh environments and high-pressure applications.
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Size Range: Outside Diameter (O.D.) from Φ406.4mm – 1422.4mm (16″ – 56″) | Wall Thickness (W.T.) up to 50mm (2″).
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Maximum Length: 12.2m (40 ft).
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Forming Technologies: JCOE (Crimping → U-forming → O-forming → Expanding) & UOE.
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Key Standards: API 5L, ASTM A53, EN 10219, EN 10210, EN 10217, AS/NZS 1163, JIS G3444.
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Grades Available: API 5L Gr.B to X80, S235JRH to S460, STK400/500, C250/350/450.
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Applications: Oil, gas, fluid transmission, heavy-duty piling, and massive structural engineering projects.
Description
1. Product Overview
LSAW (Longitudinal Submerged Arc Welding) or SAWL pipes are large-diameter steel pipes known for their reliability in high-pressure and heavy-duty environments. The primary forming technologies for LSAW pipes are JCOE and UOE.
- JCOE Forming: Consists of Crimping, U-forming, O-forming, and Expanding. It utilizes multiple pressing steps to shape the steel plate into a pipe.
- UOE Forming: Consists of U-forming, O-forming, and Expanding. This process shapes the pipe using a single, massive press.
These forming methods, combined with submerged arc welding, allow LSAW pipes to be manufactured with exceptionally thick walls and large diameters, making them ideal for heavy structural applications and long-distance fluid transmission.
2. General Specifications & Material Grades
- Outside Diameter (O.D.): Φ406.4mm – 1422.4mm (16″ – 56″)
- Length: Max 12.2m (40′)
- Wall Thickness (W.T.): Up to 50mm (2″)
| Standard | Steel Grade |
|---|---|
| API 5L (PSL1 & PSL2) | Gr.B, X42, X46, X52, X56, X60, X65, X70, X80 |
| EN 10219 / EN 10210 | S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S420, S460 |
| ASTM A53 | Gr.A, Gr.B |
| EN 10217 | P195TR1, P235TR1, P265TR1 |
| AS/NZS 1163 | C250, C350, C450 |
| JIS G3444 | STK400, STK500 |
3. Dimension & Weight of LSAW / SAWL Pipe
Below is the detailed specification matrix for nominal pipe sizes (16″ to 30″), outer diameters, wall thicknesses, and weights. Note: We can supply maximum wall thickness up to 50mm upon request.
| Nominal Pipe Size (NPS) | Outside Diameter (in) | Outside Diameter (mm) | Wall Thickness (in) | Wall Thickness (mm) | Weight (lb/ft) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| 16″ | 16.000 | 406.4 | 0.250 | 6.35 | 42.05 | 62.64 |
| 0.312 | 7.92 | 52.27 | 77.83 | |||
| 0.375 | 9.53 (STD) | 62.58 | 93.27 | |||
| 0.500 | 12.70 (XS) | 82.77 | 123.30 | |||
| 18″ | 18.000 | 457.2 | 0.250 | 6.35 | 47.39 | 70.57 |
| 0.312 | 7.92 | 58.94 | 87.71 | |||
| 0.375 | 9.53 (STD) | 70.59 | 105.16 | |||
| 0.500 | 12.70 (XS) | 93.45 | 139.15 | |||
| 20″ | 20.000 | 508.0 | 0.250 | 6.35 | 52.73 | 78.55 |
| 0.312 | 7.92 | 65.60 | 97.83 | |||
| 0.375 | 9.53 (STD) | 78.60 | 117.15 | |||
| 0.500 | 12.70 (XS) | 104.13 | 155.15 | |||
| 22″ | 22.000 | 558.8 | 0.250 | 6.35 | 58.07 | 86.41 |
| 0.312 | 7.92 | 72.26 | 107.50 | |||
| 0.375 | 9.53 (STD) | 86.61 | 128.80 | |||
| 0.500 | 12.70 (XS) | 114.81 | 171.00 | |||
| 24″ | 24.000 | 609.6 | 0.250 | 6.35 | 63.41 | 94.50 |
| 0.312 | 7.92 | 78.93 | 117.50 | |||
| 0.375 | 9.53 (STD) | 94.62 | 141.03 | |||
| 0.500 | 12.70 (XS) | 125.49 | 187.06 | |||
| 26″ | 26.000 | 660.4 | 0.250 | 6.35 | 68.75 | 102.30 |
| 0.312 | 7.92 | 85.60 | 127.30 | |||
| 0.375 | 9.53 (STD) | 102.63 | 153.00 | |||
| 0.500 | 12.70 (XS) | 136.17 | 202.72 | |||
| 28″ | 28.000 | 711.2 | 0.250 | 6.35 | 74.09 | 110.20 |
| 0.312 | 7.92 | 92.26 | 137.30 | |||
| 0.375 | 9.53 (STD) | 110.64 | 164.80 | |||
| 0.500 | 12.70 (XS) | 146.85 | 218.69 | |||
| 30″ | 30.000 | 762.0 | 0.250 | 6.35 | 79.43 | 118.10 |
| 0.312 | 7.92 | 98.93 | 147.20 | |||
| 0.375 | 9.53 (STD) | 118.65 | 176.70 | |||
| 0.500 | 12.70 (XS) | 157.53 | 234.67 |
4. Manufacturing Process Flow
Our LSAW pipes are manufactured under stringent quality controls. The steel plates go through edge milling, forming (either JCOE or UOE), tack welding, and double-sided submerged arc welding (inside and outside). To guarantee optimal shape and mechanical integrity, all pipes undergo an expansion process followed by comprehensive non-destructive testing (Ultrasonic and X-ray).
Plate Inspection → Edge Milling → Crimping → Pressing (U-ing, O-ing) → Tack Welding → Inside/Outside Welding → Expanding → Ultrasonic Testing → X-ray Testing → Final Inspection.
JCOE & UOE Pipe Forming and Welding Process