Double Submerged Arc Welded Spiral Pipe

Double Submerged Arc Welded Spiral Pipe,also referred to as double-sided SSAW pipe,is a high-performance large-diameter tubular product tailored for large-flow,high-pressure engineering scenarios.It is produced by rolling high-quality carbon steel or low-alloy steel strips into a helical shape,followed by double-sided submerged arc welding to seal the seam—an advanced process that ensures superior weld quality and structural integrity,making it ideal for demanding large-diameter pipeline projects.

Different from ordinary spiral steel pipes,large diameter spiral steel pipe focuses on the production of pipes with larger specifications,usually with an outer diameter exceeding 1000mm,and the maximum outer diameter can reach 3620mm.Its wall thickness ranges from 8mm to 30mm,and the length can be customized from 6 meters to 18 meters according to engineering needs.Common materials include Q355B,16Mn,API 5L X42-X100,which fully comply with international standards such as API 5L,GB/T 9711 and ISO 3183,ensuring stable quality and safe operation.

The core advantage of Double Submerged Arc Welded Spiral Pipe lies in its exceptional structural stability and pressure-bearing capacity,thanks to its double-sided submerged arc welding process.This welding method fully fuses the seam from both sides,eliminating potential defects and ensuring the spiral weld distributes internal and external pressure evenly across the pipe wall.Compared with straight-seam pipes,it boasts better bending resistance,compression resistance and anti-deformation performance,making it suitable for long-distance and large-flow transportation.Additionally,the spiral forming process enables the production of large-diameter pipes using narrow steel strips,improving material utilization,reducing production costs,and offering obvious economic advantages over seamless large-diameter pipes.

It is widely used in key infrastructure projects.In energy transmission,it is the core conduit for long-distance natural gas,crude oil and coal slurry pipelines;in municipal engineering,it is used for large-scale water supply,drainage and sewage treatment pipelines;in industrial and civil construction,it serves as bridge piles,port wharf supports and large-scale structural columns.After anti-corrosion treatments such as 3PE coating and epoxy resin coating,it can adapt to harsh environments such as underground,underwater and coastal areas,with a service life of 30-50 years.

As an indispensable core material for large-scale engineering,large diameter spiral steel pipe combines large flow,high strength,economy and durability,providing reliable support for global energy transmission,municipal construction and industrial development.