Why Choose Longitudinal Welded Steel Pipe?
Longitudinal Welded Steel Pipe, also known as Straight Seam Welded Pipe or LSAW Pipe (Longitudinal Submerged Arc Welded Pipe), is produced by forming steel plate into a cylindrical shape and welding along a straight seam parallel to the pipe axis.
Compared with spiral welded pipes, longitudinal welded pipes provide:
• Higher dimensional accuracy
• Better weld consistency
• Superior pressure-bearing capability
• Easier inspection and maintenance
• Excellent structural stability
• Reliable performance for critical pipeline projects
These advantages make them the preferred choice for oil & gas transmission, water transportation, piling, and structural applications.
Detailed Technical Specifications
|
Parameter |
Specification |
|
Product Name |
Longitudinal Welded Steel Pipe |
|
Manufacturing Process |
ERW / LSAW / Straight Seam Welding |
|
Outside Diameter |
21.3mm – 1422mm |
|
Wall Thickness |
1.5mm – 50mm |
|
Length |
5.8m, 6m, 9m, 12m or Customized |
|
Pipe End |
Plain End, Beveled End, Threaded End |
|
Surface Treatment |
Black, Oiled, Galvanized, FBE, 3LPE, Epoxy |
|
Steel Grade |
Gr.A, Gr.B, X42, X52, X60, X65, X70 |
|
Standard |
API, ASTM, EN, DIN, JIS |
|
Testing |
UT, RT, ET, Hydrostatic Test |
|
Certificates |
ISO, API, SGS, BV |
|
Packaging |
Export Standard Packing |
Product Features
High Strength Construction
Manufactured from premium steel plates with excellent mechanical properties.
Superior Weld Integrity
Advanced welding processes ensure strong and consistent weld quality.
Excellent Pressure Resistance
Suitable for medium and high-pressure fluid transportation systems.
Precise Dimensions
Accurate diameter, wall thickness, and straightness for easier installation.
Wide Range of Specifications
Available in various sizes and steel grades to meet project requirements.
Excellent Corrosion Protection
Optional FBE, 3LPE, galvanized, and epoxy coatings available.
Long Service Life
Designed for demanding operating environments and long-term performance.
Cost-Effective Solution
Offers an excellent balance between performance and procurement cost.
Available Steel Grades
Carbon Steel Grades
• ASTM A53 Gr.A
• ASTM A53 Gr.B
• API 5L Gr.B
• API 5L X42
• API 5L X52
• API 5L X60
• API 5L X65
• API 5L X70
Low Alloy Steel Grades
• Q235B
• Q345B
• S235JR
• S275JR
• S355JR
• L245
• L290
• L360
• L415
• L485
Surface Coating Options
Black Painted
Suitable for general transportation and storage.
Anti-Rust Oiled
Provides temporary corrosion protection.
Hot-Dip Galvanized
Excellent corrosion resistance for outdoor environments.
FBE Coating
Ideal for pipeline corrosion protection.
3LPE Coating
Recommended for underground and offshore pipelines.
Internal Epoxy Lining
Improves flow efficiency and extends service life.
Industries We Serve
Oil & Gas
Pipeline transmission systems, gathering lines, and refinery projects.
Water Treatment
Municipal water supply, desalination plants, and water transmission projects.
Construction
Buildings, stadiums, airports, and steel structure projects.
Energy
Power plants, renewable energy facilities, and offshore platforms.
Marine Engineering
Ports, docks, offshore foundations, and coastal infrastructure.
Infrastructure
Bridges, highways, railways, and public utility projects.
Manufacturing Strength
Advanced Production Facilities
Our production lines are equipped with modern forming, welding, sizing, testing, and coating equipment to ensure consistent product quality.
Strict Quality Control System
Every production stage is monitored, from raw material inspection to final shipment.
Large Production Capacity
Capable of supplying large-volume orders for EPC contractors, distributors, and infrastructure projects.
Experienced Technical Team
Professional engineers and quality inspectors ensure compliance with customer specifications and international standards.
Reliable Global Supply Chain
Efficient production planning and logistics support on-time delivery worldwide.
Custom Manufacturing Services
We provide flexible customization solutions:
• Diameter Customization
• Wall Thickness Customization
• Length Customization
• Steel Grade Selection
• Surface Coating Options
• Pipe End Processing
• Laser Marking
• Private Label Packaging
• OEM Manufacturing
• Project-Specific Production
Packaging & Shipping
Packaging
• Steel Bundles
• Waterproof Wrapping
• Plastic End Caps
• Wooden Cases (Optional)
•Bulk Packing
Shipping
• 20GP Container
• 40GP Container
• 40HQ Container
• Break Bulk Vessel
• Project Cargo Shipment
Trade Terms
• FOB
• CFR
• CIF
• EXW
• DDP
• DAP
What Information Should You Send for a Fast Quotation?
To receive an accurate quotation quickly, please provide:
• Outside Diameter
• Wall Thickness
• Steel Grade
• Pipe Length
• Required Quantity
• Surface Coating Requirement
• Application
• Destination Port
Why Global Buyers Trust Youcheng
15+ Years Industry Experience
Extensive experience serving global industrial customers.
50+ Export Markets
Products supplied to customers across Europe, the Middle East, Africa, Southeast Asia, South America, and North America.
Large Supply Capacity
Stable production capability for both stock orders and project requirements.
Strict Inspection Procedures
100% dimensional inspection and comprehensive testing available.
Fast Response
Professional quotations and technical support within 12 hours.
Third-Party Inspection Support
SGS, BV, TUV, DNV, and ABS inspections available upon request.
Our Certificate
Frequently Asked Questions
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