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China SSAW Spiral Submerged Arc Welded Steel Pipe Suppliers | High-Quality HSAW Pipe Factory
Detailed Description of SSAW Pipe
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 environments.
Oil & Gas Transport
Ideal for long-distance pipeline systems
Submarine Pipelines
Suited for offshore & underwater projects
Urban Pipeline Corridors
Widely used in city infrastructure
15–20% Higher Material Utilization
vs. straight seam welded pipe
Key Parameters for SSAW Pipe
| 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 G3444: 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
|
Frequently Asked Questions (FAQ)
Q
What is SSAW pipe and how is it different from LSAW pipe?
SSAW (Spiral Seam Submerged Arc Welded) pipe is formed by spirally coiling a hot-rolled steel strip at an angle of 15–60° and welding it using a double wire submerged arc process. Unlike LSAW (Longitudinal Submerged Arc Welded) pipe, which has a straight weld seam, SSAW pipe features a helical weld that enables more uniform stress distribution and allows larger diameters to be produced from narrower steel strips, resulting in 15–20% higher material utilization.
Q
What diameter and wall thickness range is available for SSAW pipe?
SSAW pipe is available in outer diameters ranging from 219.1mm to 3500mm (8" to 140") and wall thicknesses from 3.0mm to 25.4mm (up to 1 inch). Standard pipe lengths are 6m to 18m, with 12m being the most common for both SRL and DRL configurations.
Q
Which international standards does SSAW pipe comply with?
SSAW pipe can be manufactured to a wide range of international standards, including API 5L, ASTM A252, ASTM A333, ASTM A53, ASTM A500, ASTM A671/A672, EN10217, EN10219, ISO 3183, DIN1626, JIS G3444, GB/T9711, GB/T3091, SY/T5037, and GOST 20295, covering most global pipeline project requirements.
Q
What surface treatment options are available for SSAW pipe?
Multiple surface treatment options are available to meet different project and environmental requirements, including Bare, Black Painting, Varnish, Anti-rust Oil, 3PE (Three-Layer Polyethylene), FBE (Fusion Bonded Epoxy), Epoxy Coating, and Bitumen Coating. The choice depends on the application environment, such as underground, underwater, or above-ground installations.
Q
What quality inspections are performed on SSAW pipe?
SSAW pipes undergo comprehensive quality control procedures including Chemical Analysis, Mechanical Testing, Hydrostatic Testing, Non-Destructive Testing (UT – Ultrasonic Testing, RT – Radiographic Testing, MT – Magnetic Particle Testing), Dimensional Inspection, and Weld Inspection, ensuring full compliance with the specified standards and project requirements.
Q
What are the typical applications of SSAW pipe?
SSAW pipe is widely used in oil and gas transportation pipelines, submarine pipelines, urban pipeline corridors, water supply and drainage systems, and structural piling projects. Its large diameter capability, cost efficiency, and uniform stress distribution make it especially well-suited for long-distance pipeline construction and projects in low-temperature environments.