SSAW (Spiral Submerged Arc Welded) and LSAW (Longitudinal Submerged Arc Welded) pipes are large‑diameter welded steel pipes widely used in:
Oil & gas transmission
Water supply pipelines
Structural piling
Marine engineering
Bridges & infrastructure
Foundation and piling projects
These pipes offer:
Large diameter capability (up to 3000 mm)
High strength and excellent weld integrity
Suitable for long‑distance pipelines and heavy structural applications
SSAW is ideal for long‑distance fluid pipelines due to its spiral weld structure. LSAW is preferred for high‑pressure, high‑strength, and offshore structural applications.
🟦 SSAW vs. LSAW — Quick Comparison
Feature
SSAW (Spiral Welded)
LSAW (Longitudinal Welded)
Weld Direction
Spiral
Straight (longitudinal)
Diameter Range
Very large (up to 3000 mm)
Large (up to 1500 mm)
Strength
Excellent for fluid pipelines
Highest for structural loads
Pressure Rating
Medium–High
High
Applications
Water, oil, gas pipelines
Offshore, piling, structural
Cost
More economical
Higher cost
🟦 Standards
API 5L (PSL1 / PSL2)
ASTM A252 (Piling Pipe)
ASTM A53
EN 10219
GB/T 9711
ISO 3183
🟦 Grades
Q235 / Q345
L245 / L290 / L360 / L415 / L450
API 5L Grade B / X42 / X46 / X52 / X56 / X60 / X65
S235 / S275 / S355
🟦 Product Specifications & Available Sizes
Outer Diameter (OD)
SSAW: 219–3000 mm
LSAW: 406–1500 mm
Wall Thickness (WT)
6–30 mm
Length
6 m / 12 m / 18 m / 24 m / custom
End Types
Plain End
Beveled End
Welded‑on Flanges (optional)
Coating Options
3LPE / 3LPP
FBE (Fusion Bonded Epoxy)
Coal Tar Epoxy
Bitumen
Galvanized (optional)
Available Diameter * wall thickness (mm)
14×3
60×6
168×9.5
325×20
14×3.5
60×7
168×10
325×22
14×4
60×8
168×11
325×23
16×3
60×9
168×12
325×25
18×2
60×10
168×14
325×28
18×3
76×4.5
168×15
325×30
18×4
76×5
168×16
325×32
18×5
76×6
168×18
325×36
19×2
76×7
168×20
325×40
21×4
76×8
168×22
325×45
22×2.5
76×9
168×25
356×9.5
22×3
76×10
168×28
356×12
22×4
89×4
180×10
356×15
22×5
89×4.5
194×10
356×19
25×2.5
89×5
194×12
356×28
25×3
89×5.5
194×14
356×36
25×4
89×6
194×16
377×9
25×5
89×7
194×18
377×10
25×5.5
89×7.5
194×20
377×12
27×3.5
89×8
194×26
377×14
27×4
89×9
219×6.5
377×15
27×5
89×10
219×7
377×16
27×5.5
89×11
219×8
377×18
28×5.5
89×12
219×9
377×20
28×3
108×4.5
219×10
377×22
28×3.5
108×5
219×12
377×25
28×4
108×6
219×13
377×32
30×2.5
108×7
219×14
377×36
32×2.5
108×8
219×16
377×40
32×3
108×9
219×18
377×45
32×3.5
108×10
219×20
377×50
32×4
108×12
219×22
406×9.5
32×4.5
108×14
219×24
406×11
32×5
108×15
219×25
406×13
34×3
108×16
219×26
406×17
34×4
108×20
219×28
406×22
🟦 Chemical Composition
(Example: API 5L Grade B / X52)
API 5L Grade B
Element
Content (%)
C
≤ 0.26
Mn
≤ 1.20
P
≤ 0.030
S
≤ 0.030
API 5L X52
Element
Content (%)
C
≤ 0.28
Mn
≤ 1.40
P
≤ 0.030
S
≤ 0.030
🟦 Mechanical Properties
API 5L Grade B
Property
Requirement
Tensile Strength
≥ 415 MPa
Yield Strength
≥ 245 MPa
API 5L X52
Property
Requirement
Tensile Strength
≥ 455 MPa
Yield Strength
≥ 360 MPa
🟦 Physical Properties
Property
Value
Density
7.85 g/cm³
Thermal Conductivity
45–60 W/m·K
Magnetic
Yes
🟦 Manufacturing Processes
Spiral Submerged Arc Welding (SSAW)
Longitudinal Submerged Arc Welding (LSAW)
Ultrasonic Testing (UT)
Radiographic Testing (RT)
Hydrostatic Testing
Beveling & End Facing
Anti‑corrosion Coating
🟦 Primary Industry Usage
Oil & gas transmission pipelines
Water supply pipelines
Marine piling & offshore structures
Bridge foundations
Structural columns
Harbor & port engineering
Long‑distance fluid transportation
🟦 Why Use SSAW / LSAW Pipes
Large diameter capability
Excellent weld strength and reliability
Suitable for high‑pressure and long‑distance pipelines
Ideal for structural and piling applications
Cost‑effective for large‑scale engineering projects
🟦 Why Choose Jaron Steel
Full range of SSAW & LSAW large‑diameter pipes
API 5L / ASTM / EN / GB certified production
3LPE / FBE / galvanized coating options
MTC 3.1 + third‑party inspection
Export‑grade packaging & loading supervision
Competitive pricing for infrastructure and pipeline projects
