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API SSAW Large Diameter Spiral Welded Steel Pipe

Oct 24, 2025

Spiral welded steel pipe is a type of steel pipe manufactured using steel strip coils as raw material, formed through cold extrusion and welded using automatic double-wire double-sided submerged arc welding (DSAW) process. The pipe derives its name from the spiral-shaped distribution of its weld seams.

Features & Advantages

API Spiral welded steel pipes exhibit several notable characteristics:

  1. Superior Stress Distribution

    • The spiral weld design ensures more uniform stress distribution
    • Enables high resistance to internal pressure and external forces
    • Delivers excellent performance in fluid/gas transmission applications
  2. Large Diameter Production Capability

    • Manufacturing process accommodates wider steel strip coils
    • allows production of larger-diameter pipes
    • particularly critical for large-scale pipeline projects
  3. High Production Flexibility

    • Diameter specifications can be adjusted by varying strip width
    • welding parameters can be modified
    • enables customized production for diverse requirements
  4. Cost-Effectiveness

    • efficient manufacturing process with high material utilization
    • optimized production cost control
    • maintains strong market competitiveness

Specification

Product Name

API SSAW Large Diameter  Spiral Welded Steel Pipe

Size

OD

21mm-1219mm

Wall Thickness

2mm-60mm

Length

6m-12m or base on client’s requirement

Steel material

API 5L PSL1 Gr.B, X42, X52, X60, X70 etc.
Q235 → Grade D,SS400,S235JR,S235JO,S235J2
Q345 → SS500,ST52

Standard

EN10219,EN10210,ASTMA500,GB/T3094-2000,GB/T6728-2002,GB/T 178-2005,JIS G 3466

Usage

Used For Structure, Gas,Oil etc.

Ends

1) Plain
2) Beveled
3) Thread with Coupling or cap

End protector

1) Plastic pipe cap
2) Iron protector
3)According client’s requirement

Surface Treatment

1) Bared
2) Black Painted (varnish coating)
3) Galvanized
4) With Oiled
5) 3 PE, FBE, corrosion resistant coating

Type

Welded Pipe

Welded Line Type

Longitudinal

Section Shape

Round

Inspection

With Hydraulic Testing, Eddy Current , Infrared Test

Package

1) Bundle
2) In Bulk
3) Bags
4) Clients' Requirements

Delivery

1) Container
2) Bulk carrier

Port of Shipment

XinGang Port,Tianjin, China

Date of Delivery

According To The Quantity And Specification Of Each Order

Payment

L/C at sight,T/T

Others

Welded steel pipe, Angle, Strip, H-shape steel pipe, galvanized pipe also can be supplied


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