Hot Products
China SSAW Spiral Submerged Arc Welded Steel Pipe Factory - Trusted Suppliers of High-Quality HSAW Pipes
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 environment.
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 manufactured by spirally coiling a hot-rolled steel strip at a forming angle of 15–60° and welding it using submerged arc welding. Unlike LSAW (Longitudinal Seam Submerged Arc Welded) pipe, which has a straight seam running along the pipe's length, SSAW pipe features a helical weld seam that provides more uniform stress distribution. SSAW pipe also offers higher material utilization (15–20% more than LSAW) and can produce larger diameter pipes from narrower steel strips.
Q
What are the common standards and grades available for SSAW pipe?
SSAW pipe is produced to a wide range of international standards including API 5L, ASTM A252, ASTM A333, EN10217, ISO 3183, JIS G3444, GOST 20295, and others. Steel grades vary by standard — for example, API 5L covers grades from Gr.B to X80 (PSL1 and PSL2), while ASTM A252 covers Gr.1 to Gr.3. Please refer to the Key Parameters table above for a full list of supported grades.
Q
What diameter and wall thickness range does SSAW pipe cover?
SSAW pipe is available in outer diameters ranging from 219.1mm to 3500mm (8" to 140"), making it one of the widest diameter ranges available among welded pipe types. Wall thickness ranges from 3.0mm to 25.4mm (up to 1 inch). This broad dimensional range makes SSAW pipe suitable for a wide variety of infrastructure and industrial applications.
Q
What surface treatment options are available for SSAW pipe?
Multiple surface treatment options are available depending on the application and environment. These include bare (untreated), black painting, varnish, anti-rust oil, 3PE (three-layer polyethylene) coating, FBE (fusion bonded epoxy) coating, epoxy coating, and bitumen coating. Protective coatings such as 3PE and FBE are commonly specified for buried or subsea pipelines to prevent corrosion.
Q
What inspection and testing procedures are applied to SSAW pipe?
SSAW pipe undergoes rigorous quality control including Chemical Analysis, Mechanical Testing (tensile, yield, impact), Hydrostatic Testing, Non-Destructive Testing (NDT) methods such as Ultrasonic Testing (UT), Radiographic Testing (RT), and Magnetic Particle Testing (MT), as well as Dimensional Inspection and Weld Inspection. These tests ensure the pipe meets the required standards and is safe for its intended application.
Q
What are the typical applications of SSAW pipe?
SSAW pipe is widely used across various engineering sectors due to its large diameter capability and cost-effectiveness. Common applications include oil and gas transmission pipelines, submarine pipelines, urban pipeline corridors (water, gas, heat supply), piling pipes for construction foundations, and structural applications. It is especially well-suited for long-distance pipeline projects and environments requiring performance at low temperatures.