Basic Product Information
| Item | Details |
| Full Product Name | API 5L Grade X52 Longitudinal Submerged Arc Welded (LSAW) Steel Line Pipe |
| Standard Compliance | API Spec 5L (46th Edition), ISO 3183, GB/T 9711 |
| Equivalent Grade | L360 (per European/Chinese standard designation) |
| Product Level | Available in PSL1 / PSL2 |
| Delivery State | N(Normalized), Q(Quenched & Tempered), M(Thermo-mechanically Controlled Rolling) |
Chemical Composition
| Element | PSL1 | PSL2 |
| Carbon (C) | 0.28 | 0.24 |
| Manganese (Mn) | 1.4 | 1.4 |
| Phosphorus (P) | 0.03 | 0.025 |
| Sulfur (S) | 0.03 | 0.01 |
| Niobium (Nb) | 0.06 | 0.06 |
| Vanadium (V) | 0.06 | 0.06 |
| Titanium (Ti) | 0.04 | 0.04 |
| Carbon Equivalent (Ceq) | - | ≤ 0.43% |
Mechanical Properties
| Property | Requirement |
| Minimum Yield Strength | 358 MPa (52,000 psi) |
| Yield Strength Range | 358 – 531 MPa |
| Tensile Strength Range | 455 – 760 MPa |
| Yield-to-Tensile Ratio | ≤ 0.93 |
| -20℃ Charpy V-notch Impact Energy | ≥ 40 J |
| Maximum Hardness (Base Metal) | ≤ 250 HB |
| Maximum Hardness (Weld) | ≤ 280 HB |
Available Size Range
| Dimension | Range |
| Outer Diameter | 406 mm – 2500 mm (16" – 100") |
| Wall Thickness | 6.0 mm – 60 mm (SCH 10 – SCH 160, STD/XS/XXS available) |
| Standard Length | 5.8 m (19ft), 6.0 m (20ft), 11.8 m (38.7ft), 12.0 m (40ft), SRL/DRL |
| Custom Length | Available upon request |
Manufacturing & Quality Control
| Process Step | Details |
| Forming Method | JCOE / UOE |
| Welding Process | Double-sided submerged arc welding (DSAW) |
| Weld Treatment | Online scarfing, post-weld normalization (900-950℃) |
| Non-destructive Testing | 100% Ultrasonic Testing (UT), 100% Eddy Current Testing (ET), X-ray imaging for high-requirement products |
| Additional Tests | Hydrostatic test (1.5× standard pressure, ≥10s holding), Guided-bend test, CVN impact test, DWT test (for PSL2) |
End Treatment & Surface Protection
| Option | Available Types |
| End Preparation | Plain end, Beveled end, Threaded end |
| Surface Coatings | Natural bare steel, Black paint, Varnish, FBE, 3LPE/3PP coating |
| End Protection | Plastic or iron protect caps available |
Key Features & Applications
| Feature | Benefit | Typical Applications |
| Precise forming, low residual stress | High dimensional stability and pressure resistance | Large-diameter long-distance oil & gas transmission pipelines |
| Excellent low-temperature toughness | Stable performance in extremely cold environments | Onshore & subsea oil/gas collection and transmission lines |
| Good weldability and corrosion resistance | Lower construction cost, longer service life | Urban high-pressure gas distribution networks, water injection pipelines for oilfields |
| Cost-effective for large diameter | Lower material and installation cost than seamless pipe | Offshore platform risers, CCUS and hydrogen transmission infrastructure, structural pipe piling |
API 5L X52 LSAW Steel Pipe production Process
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Address: Chenda Road,Daqiuzhuang Town Jinghai County,Tianjin,China.
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