SSAW Spiral Submerged Arc Welded Steel Pipe - High-Quality China Suppliers & Factory for Large Diameter Pipes
Spiral Seam Submerged Arc Welded Steel Pipe (SSAW/HSAW) is manufactured through a unique spiral forming process, in which the hot rolled steel strip is first flattened and then spirally coiled at a forming angle of 15-60°, and then internally and externally welded using a double wire submerged arc welding process. This process is capable of producing a 2.5 meter diameter pipe from a 1.2 meter wide steel strip, with a material utilization rate 15-20% higher than that of a straight seam welded pipe, and the spiral weld allows for a more uniform stress distribution. Its excellent cost performance makes it widely used in engineering fields such as oil and gas transportation, submarine pipelines and urban pipeline corridors, especially suitable for long-distance pipeline construction and low-temperature environment.
Coiled at a forming angle of 15-60° with double wire submerged arc welding.
Material utilization rate is 15-20% higher than straight seam welded pipes.
Spiral weld structure allows for highly uniform stress distribution.
| Parameter | Details |
|---|---|
| Standards | API 5L, ASTM A252, EN10217, ASTM A333, SY/T5037, GB/T9711, DIN1626, GB/T3091, ASTM A53, ASTM A671, ASTM A672, ASTM A500, ISO3183, EN10219, JIS G3444, GOST 20295 |
| Steel Grade |
API 5L: (PSL1, PSL2), Gr.B, X42-X80;
ASTM A252: Gr.1, Gr.2, Gr.3;
ASTM A333: GR.1-10;
SY/T: Q235B, Q345B, L245-L555;
EN: S235GT, S355GT; GB/T3091: (Q235B, Q355B, Q355D); ASTM A53: (Grade A, Grade B); ASTM A671/A672: (CA55, CB60, CB65, CC60, CC65, CC70/A45, A50, B60, C55, C60, C70, D80); ASTM A500: (Grade A, Grade B, Grade C); ISO 3183: (L245, L290, L360, L415, L485, L555); EN 10219: (S235JR, S355J0, S355J2); JIS G 3444: (STK400, STK500); GOST 20295: (K34, K38, K42, K50, K52, K55, K60) |
| Outer Diameter (OD) | 219.1mm - 3500mm (8" - 140") |
| Wall Thickness (WT) | 3.0mm - 25.4mm (up to 1 inch) |
| Length | 6m - 18m, commonly 12m (SRL/DRL) |
| Pipe Ends | Beveled End (BE), Plain End (PE) |
| Surface Treatment | Bare, Black painting, Varnish, Anti-rust oil, 3PE, FBE, Epoxy coating, Bitumen coating |
| Inspection | Chemical Analysis, Mechanical Testing, Hydrostatic Test, NDT (UT, RT, MT), Dimensional Inspection, Weld Inspection |