Product Overview
Large Diameter Welded Steel Pipe is a heavy-duty pipeline solution designed for long-distance fluid transmission, high-pressure oil & gas pipelines, and large-scale infrastructure engineering projects.
Produced by Youcheng Steel, the pipes are manufactured using advanced:
• LSAW (Longitudinal Submerged Arc Welded)
• SSAW (Spiral Submerged Arc Welded)
Technical Specifications
|
Item |
Specification |
|
Outer Diameter |
406 mm – 1626 mm (16" – 64") |
|
Wall Thickness |
6 mm – 40 mm (up to 60 mm customized) |
|
Length |
6 – 18 meters |
|
Steel Grades |
API 5L Gr.B / X42 / X52 / X60 / X65 / X70 / X80 |
|
Standards |
API 5L / ASTM A252 / ASTM A671 / EN 10219 / ISO 3183 |
|
Pipe Types |
LSAW / SSAW / DSAW |
|
End Types |
Beveled / Plain / Threaded |
|
Surface |
Black / Anti-rust oil / Varnish |
|
Coating |
3LPE / 3LPP / FBE / Cement Mortar Lining |
Primary Applications
Oil & Gas Cross-Country Pipelines
High-grade API 5L pipes for onshore/offshore crude oil and natural gas transmission.
Heavy Structural & Marine Piling
High-load bearing foundation piles for deep-sea ports, marine docks, cross-sea bridges, and high-rise structural civil engineering.
Municipal Water Infrastructure
High-volume water supply mains, industrial effluent lines, and massive drainage systems (AWWA C200 compliant).
Dredging & Slurry Transport
Highly wear-resistant pipelines designed for port expansions and land reclamation projects.
Steel Grades & Engineering Performance
We supply full-range pipeline steel grades designed for different pressure and engineering requirements:
• Gr.B – Structural and low-pressure systems
• X42–X52 – Medium-pressure water and oil pipelines
• X60–X70 – Long-distance oil & gas transmission systems
• X80 – High-strength critical energy infrastructure projects
All materials are fully traceable with Mill Test Certificates (MTC) to ensure compliance with international engineering standards.
Anti-Corrosion Protection Systems
To ensure long-term pipeline durability:
• 3LPE coating → Underground oil & gas pipelines
• 3LPP coating → High temperature pipelines
• FBE coating → Industrial corrosion protection
• Cement mortar lining → Water transmission systems
Custom Engineering Options
We provide full customization based on project specifications:
• Diameter: 406 mm – 3500 mm+
• Wall thickness: 6 mm – 60 mm+
• Steel grades: full API 5L range
• Pipe length customization
• End finishing (beveled / plain / machined)
• Coating systems (3LPE / FBE / epoxy)
• Inspection level (PSL1 / PSL2 / project-specific requirements)
Why Contractors Choose Youcheng
Engineering Grade Manufacturing System
• API 5L PSL1 / PSL2 certified production
• Full traceability of raw materials
• Strict chemical and mechanical property control
• Engineering-level quality assurance system
Stable EPC Project Supply Capability
• Large-scale production capacity for long-term pipeline projects
• Batch-to-batch consistency control
• Reliable delivery for international EPC contracts
Cost Advantage from Direct Factory Supply
• No trading intermediaries
• Competitive pricing for bulk procurement
• Project-based quotation optimization
International Inspection Acceptance
• SGS / BV / Lloyd's inspection support
• Third-party inspection welcomed at any stage
• Full compliance with global engineering standards
Our Certificate
Frequently Asked Questions
Hot Tags: large diameter welded steel pipe, China large diameter welded steel pipe manufacturers, suppliers, factory, Hollow Section Rectangular Tube, Hydraulic Precision Steel Pipe, Polyethylene Coated Steel Pipe
