API 5L Grade B PSL2 LSAW steel pipe represents the optimal balance of performance, reliability, and cost-effectiveness for medium-to-large diameter pipeline projects. With its strict adherence to PSL2 standards and advanced LSAW technology, it delivers the safety and longevity required for modern energy transportation infrastructure.
Products Description
| Product | API 5L Grade B PSL2 LSAW Steel Pipe |
| Standard | API 5L |
| 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
The production of API 5L Grade B PSL2 LSAW Steel Pipe involve a rigorous sequence of steps designed to maximize strength and integrity:
Plate Preparation: High-quality carbon steel plates undergo ultrasonic testing to detect any internal defects before processing .
Forming (JCOE): The steel plate is progressively formed into a "J," then "C," and finally an "O" shape using specialized molding machines. This asymptotic bending method minimizes residual stress and maintains excellent pipe geometry .
Pre-Welding: A preliminary weld is applied to hold the shape, often using MAG (Metal Active Gas) welding, ensuring stability before final welding .
Submerged Arc Welding: Both the inner and outer seams are welded using tandem multi-wire submerged arc welding. This technique provides deep penetration and superior weld toughness .
Mechanical Expansion: The pipe undergoes overall mechanical expansion treatment. This critical step reduces internal stress, prevents stress corrosion cracking, and ensures high dimensional accuracy
Features and Advantages
Superior Strength and Durability: The use of thick steel plates and double-sided submerged arc welding results in pipes with high tensile strength and excellent ductility .
Large Diameter Capability: Unlike ERW pipes, LSAW technology can produce very large diameters with thick walls, essential for major transmission pipelines .
High Dimensional Accuracy: The mechanical expansion process ensures tight tolerances on outer diameter and wall thickness, facilitating easier on-site welding and installation .
Excellent Weld Quality: The submerged arc welding process protects the molten pool from atmospheric contamination, resulting in clean, defect-free welds that are easy to inspect via NDT methods .
Cost-Effectiveness: For large-diameter applications, LSAW pipes offer a more economical solution compared to seamless pipes while maintaining comparable performance characteristics
Surface Coatings
To enhance durability in various environments, API 5L PSL1 PSL2 LSAW Steel Pipe 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
API 5L Grade B PSL2 LSAW pipes are widely used in critical infrastructure projects, including:
Long-distance oil and natural gas transmission pipelines.
Offshore and onshore pipeline networks.
Water supply and sewage treatment systems.
Structural applications in construction and industrial plants.
Enhanced Quality Control (PSL2 Requirements)
Unlike PSL1, API 5L PSL2 imposes stricter requirements on chemical composition, mechanical properties, and testing:
Chemical Composition: Tighter controls on Carbon, Manganese, Phosphorus, and Sulfur content to ensure weldability and toughness.
Impact Testing: Mandatory Charpy V-Notch (CVN) impact tests to verify toughness at specified temperatures.
Non-Destructive Testing (NDT): 100% ultrasonic testing (UT) or radiographic testing (RT) of the weld seam and body to detect any internal defects.
Traceability: Full traceability from raw material to finished product, accompanied by EN 10204 3.1/3.2 Mill Test Certificates.
Choose 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
Hot Tags: api 5l grade b psl2 lsaw steel pipe, China api 5l grade b psl2 lsaw steel pipe manufacturers, suppliers, factory, steel pipe exporter, steel tube for design, steel tube for electrical, steel tube for engineering, steel tube for institutional design, Structural Steel Pipe
