Spiral Welded Pipe for Piling
TAG：Spiral Pipe for Structural Use Spiral Steel Pipe for Bridge Engineering Spiral Pipe for Water Conservancy Project
Spiral Welded Pipe for Piling,also known as SSAW(Spiral Submerged Arc Welded)Pipe Pile,is a premium deep-foundation component manufactured by helically forming hot-rolled high-strength steel coils and applying double-sided submerged arc wel...
Spiral Welded Pipe for Piling,also known as SSAW(Spiral Submerged Arc Welded)Pipe Pile,is a premium deep-foundation component manufactured by helically forming hot-rolled high-strength steel coils and applying double-sided submerged arc welding.Its continuous helical weld seam offers inherent structural advantages over straight-seam pipes,making it a first-choice solution for heavy-duty foundation projects in complex geological and marine environments.
Manufacturing Process&Standards
Production Flow:Uncoiling→Leveling→Edge trimming→Helical forming→Double-sided submerged arc welding→Sizing→Cutting→Non-destructive testing(UT/RT)→Surface treatment&anti-corrosion(coating,galvanizing)→Final inspection&marking.
Key Standards:
International:ASTM A252,API 5L,ISO 3183,AWS D1.1
Chinese:SY/T 5040,GB/T 9711
Typical Specifications:Diameter 325mm–2400mm;Wall thickness 8mm–60mm;Length 6m–12m(custom lengths available for large projects).
Core Advantages
Superior Stress Distribution:The helical weld disperses axial,hoop,and lateral loads more evenly,significantly reducing weld failure risks during pile driving and under long-term service.
High Strength-to-Weight Ratio:Made of Q345(16Mn)and higher-grade high-strength low-alloy steel,enabling thinner walls for the same load capacity,lowering material and transportation costs.
Large Diameter Flexibility:Can be fabricated into large-diameter pipes from narrow coils,with shorter lead times compared to plate-based straight-seam piles.
Strong Corrosion Resistance:Optional anti-corrosion treatments(3PE coating,fusion-bonded epoxy,hot-dip galvanizing)extend service life in coastal/marine and high-moisture soil conditions.
Cost Efficiency:Continuous mass production,less material waste,and simplified on-site splicing cut overall project costs and construction schedules.
Applications
It is widely applied in critical infrastructure projects:
Bridge foundations(viaducts,cross-river/sea bridges)
Deep foundations for high-rise buildings and industrial plants
Port terminals,breakwaters,and offshore platform piles
Retaining walls,slope stabilization,and flood control projects
Wind farm tower foundations(onshore and offshore)
