LSAW Welded Carbon Steel Pipes
LSAW (Longitudinal Submerged Arc Welded) carbon steel pipes are widely used in large-diameter pipeline systems requiring high strength, excellent weld integrity, and reliable pressure performance. These steel pipes are manufactured using advanced submerged arc welding technology, producing strong longitudinal weld seams suitable for demanding industrial applications.
SHAANXI GOLD-STONE supplies high-performance LSAW welded steel pipes for global oil & gas transmission, offshore engineering, petrochemical processing, water transportation, energy infrastructure, and structural construction projects.
Our LSAW steel pipes are manufactured according to international standards including API 5L, ASTM, and EN specifications, ensuring stable mechanical properties and compliance with international engineering requirements.
High-Strength Steel Pipes for Large-Scale Pipeline Systems
Large-diameter pipeline systems operate under complex conditions including:
- High internal pressure
- Long-distance transportation
- Corrosive environments
- Offshore exposure
- Heavy structural loads
- Extreme operating temperatures
LSAW welded pipes are engineered to provide excellent structural stability, superior weld performance, and long-term operational reliability in demanding industrial environments.
Compared with smaller welded pipe types, LSAW pipes offer superior large-diameter manufacturing capability and are particularly suitable for high-pressure transmission systems and heavy engineering projects.
LSAW Steel Pipe Manufacturing Process
LSAW pipes are produced by forming steel plates into cylindrical shapes followed by longitudinal submerged arc welding. The submerged arc welding process ensures:
- Deep weld penetration
- Strong weld seam integrity
- Stable mechanical properties
- Low welding defects
- Excellent pressure resistance
Advanced production equipment and strict welding control help ensure consistent pipe quality and reliable performance for critical industrial applications.
LSAW Steel Pipe Specifications
| Product Type | Standard / Grade | Size Range |
| Carbon Steel Line Pipe | API 5L Gr.B, X42, X52, X60, X65, X70, X80, X90, X100 | 16″ – 64″ |
| Carbon Steel Process Pipe | ASTM A53 / ASTM A333 / ASTM A671 / ASTM A672 / ASTM A691 | 16″ – 64″ |
| Carbon Steel Structural Pipe | API 2W 50 Z35 S1,S2,S5,S7,S8,S9 / API 5L X52 / EN 10225 S355J2+N / S355G2+N | 16″ – 64″ |
Key Features of LSAW Welded Steel Pipes
Large Diameter Capability
LSAW production technology supports large-diameter steel pipe manufacturing up to 64 inches, making these pipes ideal for long-distance transmission systems.
High Structural Strength
Manufactured from high-grade carbon steel plates, LSAW pipes provide excellent tensile strength and structural stability for heavy engineering applications.
Excellent Weld Integrity
Submerged arc welding technology ensures strong and reliable longitudinal weld seams with excellent pressure resistance.
Suitable for High-Pressure Pipelines
LSAW pipes are widely used in oil, gas, and energy transmission systems operating under high pressure conditions.
Excellent Mechanical Properties
Stable material performance ensures reliable operation in offshore, petrochemical, and industrial processing environments.
Good Corrosion Protection Compatibility
Suitable for multiple anti-corrosion coating systems for buried pipelines and offshore applications.
Available Steel Grades
SHAANXI GOLD-STONE supplies LSAW pipes in various carbon steel and high-strength pipeline steel grades.
API 5L Line Pipe Grades
- Gr.B
- X42
- X52
- X60
- X65
- X70
- X80
- X90
- X100
These grades are widely used in oil and natural gas transmission pipelines.
ASTM Pipe Standards
- ASTM A53
- ASTM A333
- ASTM A671
- ASTM A672
- ASTM A691
Suitable for industrial process piping, low-temperature systems, and pressure applications.
Offshore & Structural Steel Grades
- API 2W 50 Z35
- EN 10225 S355J2+N
- S355G2+N
Designed for offshore platforms and heavy structural engineering projects.
Surface Treatment & Anti-Corrosion Coatings
To improve corrosion resistance and service life, SHAANXI GOLD-STONE provides multiple surface treatment options.
Black Painted Coating
Provides basic corrosion protection during transportation and storage.
Anti-Rust Oil Coating
Temporary corrosion protection for industrial storage applications.
Hot-Dip Galvanized Coating
Suitable for outdoor structural applications requiring enhanced corrosion resistance.
Fusion Bonded Epoxy (FBE) Coating
Widely used for buried oil and gas pipelines requiring strong anti-corrosion protection.
3PE / 3LPE Coating
Advanced external anti-corrosion coating system for underground and offshore pipeline applications.
These coating systems help extend pipeline lifespan in harsh industrial and marine environments.
Applications of LSAW Steel Pipes
LSAW welded carbon steel pipes are widely used in:
Oil & Gas Transmission Pipelines
Large-diameter pipelines for crude oil, natural gas, and petroleum transportation.
Petrochemical Processing Plants
Industrial process piping systems for refineries and chemical plants.
Offshore Platform Structures
Structural steel pipe systems for offshore engineering and marine applications.
Water Transportation Systems
Large-capacity water transmission and municipal infrastructure projects.
Energy & Power Plants
Steam, cooling water, and industrial pipeline systems for power generation facilities.
Structural Engineering
Steel structural frameworks for bridges, ports, industrial plants, and heavy construction projects.
Advantages of LSAW Pipes
Compared with other welded pipe types, LSAW pipes offer:
- Larger diameter manufacturing capability
- Better structural performance
- Higher pressure resistance
- Excellent weld quality
- Strong mechanical strength
- Better suitability for long-distance transmission pipelines
These advantages make LSAW pipes one of the preferred steel pipe solutions for large-scale industrial infrastructure projects.
Quality Control & Inspection
SHAANXI GOLD-STONE implements strict quality control procedures during pipe manufacturing and export processing.
Inspection Services Include
- Chemical composition analysis
- Mechanical property testing
- Hydrostatic pressure testing
- Weld seam inspection
- Ultrasonic testing (UT)
- X-ray testing (RT)
- Dimensional inspection
- Coating thickness inspection
All products are manufactured according to international quality standards and engineering specifications.
Why Choose SHAANXI GOLD-STONE
SHAANXI GOLD-STONE is a professional supplier and exporter of industrial steel pipes, pipeline materials, and engineering products for global industrial projects.
Our Advantages
- Large-diameter steel pipe supply capability
- International standard manufacturing
- Strict quality inspection system
- Professional export experience
- Stable global supply chain
- Competitive international pricing
- Reliable delivery support
- Customized pipeline solutions
We support infrastructure, energy, petrochemical, offshore, and industrial construction projects worldwide.