Product Overview
Thick Wall Welded Steel Pipe is a high-strength industrial steel pipe designed for heavy-load, high-pressure, and large-diameter engineering applications. It is manufactured using advanced welding processes such as LSAW (Longitudinal Submerged Arc Welded) and SSAW (Spiral Submerged Arc Welded).
Compared with seamless pipes, thick wall welded steel pipes provide a more cost-effective and scalable solution for large-diameter infrastructure projects, while maintaining excellent structural integrity and pressure resistance.
These pipes are widely used in oil & gas transmission, offshore structures, piling foundations, power plants, and large-scale infrastructure systems.
Technical Specifications
|
Item |
Specification |
|
Product Name |
Thick Wall Welded Steel Pipe |
|
Manufacturing Type |
LSAW / SSAW |
|
Outer Diameter |
219mm – 3500mm (customizable) |
|
Wall Thickness |
8mm – 80mm+ |
|
Length |
5.8m / 11.8m / 12m / custom |
|
Steel Grades |
API 5L Gr.B / X42 / X52 / X60 / X65 / X70, ASTM A53, ASTM A106, Q235, Q345, S355 |
|
Standards |
API 5L, ASTM, DIN, EN, GB |
|
End Type |
Beveled / Plain / Threaded (optional) |
|
Surface Treatment |
Black coating, anti-rust oil, 3PE, FBE, galvanized |
|
Inspection |
UT, RT, Hydrostatic test, mechanical test |
Why Choose Thick Wall Welded Steel Pipe
Cost Efficiency for Large Diameter Projects
For diameters above 219mm, welded steel pipes offer significantly lower production and material cost compared to seamless pipes.
Engineering-Grade Structural Strength
Designed to withstand external load, soil pressure, and mechanical stress, making them ideal for underground and offshore applications.
Scalable Manufacturing Capability
Suitable for ultra-large diameter production up to 3500mm, meeting the requirements of national infrastructure and energy projects.
Flexible Engineering Customization
Fully customizable in:
• Diameter
• Wall thickness
• Steel grade
• Coating system
• End finishing
Engineering Application Scenarios
Oil & Gas Projects
High-pressure crude oil transmission lines
Natural gas trunk pipelines
Offshore platform piping systems
Power & Energy Systems
Boiler feedwater pipelines
Thermal power plant circulation systems
Hydropower pressure pipelines
Infrastructure Engineering
Deep foundation piling systems
Bridge load-bearing structures
Underground structural support systems
Offshore & Marine Engineering
Offshore platform structural piping
Shipbuilding structural systems
Subsea engineering pipelines
Quality Assurance
To ensure safe and reliable delivery for global projects:
• Full raw material traceability system
• Chemical composition inspection before production
• Ultrasonic testing (UT) for weld integrity
• Radiographic testing (RT) for internal defects
• Hydrostatic pressure testing for safety verification
• Mechanical property testing (tensile, impact, hardness)
• Third-party inspection available (SGS / BV / TUV)
Surface Protection Systems
To extend service life in different environments:
• 3PE coating (best for underground pipelines)
• FBE coating (chemical resistance applications)
• Anti-corrosion black painting / oil coating
• Bitumen coating for water pipelines
• Galvanized coating for structural use
Custom Engineering Services
We support full project-based customization:
• Diameter & wall thickness optimization
• Steel grade selection based on working pressure
• Fixed or random length production
• End finishing (bevel / thread / plain)
• Coating system selection
Packaging & Global Delivery
Packaging
• Steel strip bundling
• Plastic end caps
• Waterproof wrapping
• Steel frame / wooden rack (project shipment)
Delivery Terms
FOB / CIF / CFR / EXW
Lead Time
15–45 days depending on order specification
Our Certificate
Frequently Asked Questions
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