Spiral Welded Pipe | SSAW Steel Pipe | Large Diameter & Structural Applications

🟧 Product Overview

Spiral Welded Pipe (SSAW) is manufactured by forming carbon steel strip into a spiral shape and welding the seam continuously. This process allows for large diameters, thick walls, and excellent weld strength, making SSAW pipes ideal for structural and pipeline applications.

Spiral welded pipes are widely used in piling, water pipelines, bridge foundations, offshore structures, and industrial construction due to their high load‑bearing capacity and cost‑effective production.

🟧 Standards

• API 5L
• ASTM A252
• ASTM A53
• EN 10219
• ISO / DIN structural pipe standards

🟧 Available Grades

• Q235
• Q345
• S235
• S355
• API 5L Gr. B / X42 / X52 / X60

🟧 Product Specifications & Available Sizes

Specification	Details
Outside Diameter	219–3000 mm
Wall Thickness	4–30 mm
Length	6 m / 12 m / custom
Type	SSAW Spiral Welded
Ends	Plain End / Beveled End
Coating	Bare / Black / 3PE / 3PP / FBE
Tolerance	As per API / ASTM / EN standards

Dimensions mm	Thickness（mm）
1260*2440	1.5
1260*2440	2. 0
1260*6000	1.8
1260*6000	2. 0
1260*6000	2. 5
1260*6000	2. 75
1260*6000	2. 95
1260*6000	3. 5
1260*6000	3. 75
1260*6000	3. 95
1260*6000	4. 5
1260*6000	4. 75
1260*6000	4. 95
1260*6000	5. 5
1260*6000	5. 75
1260*6000	5. 75
1510*6000	8. 0
1510*6000	10
1510*6000	12
1510*6000	15
The above are the general items, for the special types, we can also meet your needs.

🟧 Chemical Composition (Typical Carbon Steel Grades)

Element	Q235 (%)	Q345 (%)
C	≤ 0.22	≤ 0.20
Mn	≤ 1.40	≤ 1.70
Si	≤ 0.35	≤ 0.55
P	≤ 0.045	≤ 0.035
S	≤ 0.045	≤ 0.035

🟧 Mechanical Properties

Property	Q235	Q345
Tensile Strength	375–500 MPa	470–630 MPa
Yield Strength	≥ 235 MPa	≥ 345 MPa
Elongation	≥ 26%	≥ 21%

🟧 Physical Properties

Property	Value
Density	7.85 g/cm³
Modulus of Elasticity	200 GPa
Thermal Conductivity	54 W/m·K
Magnetic	Magnetic

🟧 Manufacturing Processes

• Spiral forming
• Automatic submerged arc welding (inside & outside)
• Ultrasonic testing
• Hydrostatic testing
• Beveling, cutting, coating

🟧 Primary Industry Usage

• Steel pipe piles and foundation support
• Water and slurry transportation pipelines
• Structural columns and industrial supports
• Marine and offshore engineering
• Long‑distance fluid pipelines
• Bridge and highway construction

🟧 Why Use Spiral Welded Pipe

• Large diameter and heavy wall capability
• Excellent weld strength and structural integrity
• Cost‑effective for long‑distance pipelines
• Suitable for piling and heavy‑duty applications
• Flexible production for custom sizes

🟧 Why Choose WelSteels

• Full range of SSAW spiral welded pipes
• Advanced submerged arc welding technology
• Strict NDT, UT, and hydrostatic testing
• SGS / BV third‑party inspection available
• Custom coating, beveling, and fabrication
• Export‑grade seaworthy packaging
• Fast delivery from stock and mill production