API 5L LSAW Steel Linepipe is a high-performance welded pipe manufactured in compliance with the American Petroleum Institute (API) Specification 5L. It is primarily designed for the safe and efficient long-distance transportation of oil, natural gas, water, and other fluids in the energy sector.
Products Description
| Product | API 5L LSAW Steel Linepipe |
| Standard | API 5L PSL1, PSL2 |
| Grade | B, X42, X46, X52, X56, X60, X65, X70 |
| Manufacturing method | Longitudinal Submerged Arc Welding, JCOE forming |
| Range | OD 406~1620mm, Thickness 8~50mm |
| Coating | Bare, black painting, FBE, Epoxy , 3LPE,3LPP... |
| Ends | Bevel or Plain or Groove |
| Applications | Oil/Gas/Water piping line, Stucture, Piling... |
manufacturing process
Features and Advantages
High Dimensional Accuracy: The forming and expanding processes ensure precise dimensions, facilitating easier on-site welding and installation.
Excellent Weld Quality: The stable SAW process produces consistent, high-integrity welds with low defect probability.
Superior Mechanical Properties: Through TMCP and normalizing treatments, the pipes offer high strength, good low-temperature toughness, and controlled yield-to-tensile ratio (e.g., below 0.85), enhancing strain-based design capability for challenging environments.
Comprehensive Quality Control: Production adheres strictly to API 5L standards. Quality assurance includes rigorous chemical composition analysis, mechanical property testing (tensile, impact), and non-destructive examination (UT, ET). High-grade products often employ Automated Ultrasonic Testing (AUT). Crucially, each pipe undergoes a mandatory hydrostatic pressure test, which cannot be substituted by NDE according to API standards.
Low Residual Stress: The full-length expansion process effectively minimizes and uniformly distributes internal stress, helping to prevent stress corrosion cracking.
Surface Coatings
To enhance durability in various environments, LSAW pipes can be supplied with protective coatings.
Common options include Black painting, Fusion Bonded Epoxy (FBE), 3-layer Polyethylene (3PE), 3-layer Polypropylene (3PP),
coal tar epoxy, and bitumen coating.
Applications
Long-Distance Oil & Gas Transmission: The core application for high-grade LSAW pipes (e.g., X70, X80) is in major cross-country pipeline projects for oil and natural gas.
City Gas Distribution & Industrial Networks: Used in urban gas grids, chemical plant piping, and strategic petroleum reserve facilities.
Demanding Environment Pipelines: Suitable for challenging applications such as offshore/subsea pipelines, arctic regions, permafrost zones, and seismic areas, where requirements for high toughness, strain capacity, and corrosion resistance (especially against H2S) are critical.
quality control
API 5L LSAW Steel Linepipe undergoes strict quality control per Standard requirements
* Hydrostatic Pressure Testing
* Non-Destructive Testing (X-Ray, Ultrasonic)
* Chemical composition test
* Mechanical Property Testing
* Dimension & Visual Inspection
* Full Traceability (Mill Test Certificates 3.1 provided)
why us
* High quality assured & Fast delivery.
* Rich experiences(23+years) in Technics/Production/Post-sales.
* Technical & full set of documents support (API 5L, ISO, MTC, ITP &MPS .etc)
shipment
Contact
Kevin
Tianjin shenzhoutong steel pipe co.,ltd
kevin@tjshenzhoutong.com
Mob/whatsapp/wechat +86 15267768016
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