ERW Round Pipe (Electric Resistance Welded) is produced by forming steel strip into a round shape and welding the seam using high‑frequency resistance welding. It is widely used in:
Structural engineering
Low‑pressure fluid transportation
Mechanical fabrication
Scaffolding
Construction and general engineering
ERW round pipes offer:
Smooth internal surface
Uniform wall thickness
High dimensional accuracy
Cost‑effective performance
They are one of the most commonly used welded pipe types in global construction and mechanical industries.
🟦 Standards
ASTM A53
ASTM A500
EN 10219
BS 1387
GB/T 13793
API 5L (for non‑critical applications)
🟦 Grades
Q195 / Q215 / Q235
Q345 (high strength)
S235 / S275 / S355
ASTM A53 Grade A/B
ASTM A500 Grade A/B/C
🟦 Product Specifications & Available Sizes
Outer Diameter (OD)
12–660 mm
Wall Thickness (WT)
0.8–20 mm
Length
6 m / 12 m / custom
End Types
Plain End
Beveled End
Threaded with Coupling (optional)
Surface Options
Black
Pre‑galvanized
Hot‑dip galvanized
Oiled
Varnish coated
Specifications（mm）Diameter * wall thickness
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: Q235 / S235)
Q235
Element
Content (%)
C
≤ 0.22
Mn
≤ 1.40
Si
≤ 0.35
P
≤ 0.045
S
≤ 0.045
S235
Element
Content (%)
C
≤ 0.22
Mn
≤ 1.60
Si
≤ 0.55
P
≤ 0.040
S
≤ 0.040
🟦 Mechanical Properties
Q235
Property
Requirement
Tensile Strength
375–500 MPa
Yield Strength
≥ 235 MPa
Elongation
≥ 26%
S235
Property
Requirement
Tensile Strength
360–510 MPa
Yield Strength
≥ 235 MPa
Elongation
≥ 26%
🟦 Physical Properties
Property
Value
Density
7.85 g/cm³
Thermal Conductivity
45–60 W/m·K
Magnetic
Yes
🟦 Manufacturing Processes
High‑frequency ERW welding
Sizing & straightening
Annealing (optional)
Galvanizing (optional)
Hydrostatic testing
Eddy current testing
🟦 Primary Industry Usage
Structural engineering
Scaffolding systems
Mechanical fabrication
Low‑pressure fluid pipelines
Construction frameworks
Furniture and automotive components
🟦 Why Use ERW Round Pipe
Cost‑effective welded pipe solution
High dimensional accuracy
Smooth internal surface for fluid flow
Suitable for welding, bending, and fabrication
Available in black and galvanized finishes
🟦 Why Choose Jaron Steel
Full size range of ERW round pipes
Black, pre‑galvanized, and hot‑dip galvanized options
MTC 3.1 + third‑party inspection
Export‑grade packaging & loading supervision
Competitive pricing for construction and engineering projects
