Galvanized Round Welded Pipe | Hot‑Dip Galvanized ERW Steel Pipe | Corrosion‑Resistant Structural Pipe

🟧 Product Overview

Galvanized Round Welded Pipe is produced by welding carbon steel strip (ERW, LSAW, or SSAW) and applying a hot‑dip zinc coating for superior corrosion resistance.

The welded structure provides excellent dimensional accuracy, smooth surface finish, and cost‑effective performance. The zinc coating protects the steel from rust and oxidation, making it ideal for outdoor, structural, and general engineering applications.

This product is widely used in construction, fencing, greenhouses, water pipelines, and industrial support systems.

🟧 Types

1. Hot‑Dip Galvanized Welded Pipe

• Thick zinc layer
• Best corrosion resistance
• Suitable for outdoor and industrial environments

2. Pre‑Galvanized Welded Pipe

• Thin zinc layer
• Suitable for indoor or light‑duty applications

🟧 Standards

• ASTM A53
• ASTM A795
• BS 1387
• EN 10240
• ISO / DIN galvanized pipe standards

🟧 Product Specifications & Available Sizes

Specification	Details
Outside Diameter	21.3–406 mm
Wall Thickness	1.0–20 mm
Length	6 m / 12 m / custom
Zinc Coating	40–600 g/m²
Type	ERW / LSAW / SSAW
Ends	Plain End / Beveled End
Surface	Bright / Matte / Spangle
Tolerance	As per ASTM / EN standards

Regular Size mm
Ф21×4	Ф87×17.5	Ф121×19	Ф168×19
Ф21×4.5	Ф89×6-12	Ф124×6.5	Ф168×8
Ф22×6.5	Ф89×15	Ф127×10	Ф170×25
Ф25×8	Ф89×17	Ф127×13	Ф172×18
Ф28×8	Ф91×7.5	Ф127×8	Ф180×10
Ф30×10	Ф92×12	Ф130×12	Ф180×18
Ф30×8	Ф95×10	Ф130×18	Ф180×6
Ф32×8	Ф95×12	Ф133×6-12	Ф180×8
Ф34×6	Ф95×16	Ф133×18	Ф183×18
Ф34×8	Ф95×20	Ф140×8-12	Ф185×18
Ф38×10	Ф95×5.5	Ф140×15	Ф185×20
Ф38×8	Ф95×8	Ф140×20	Ф192×18
Ф40×10	Ф100×8.5	Ф142×18	Ф194×10
Ф40×8	Ф100×13	Ф145×18	Ф194×16
Ф42×5-10	Ф102×6-10	Ф146×10	Ф196×16
Ф45×6-12	Ф102×15	Ф146×12	Ф196×24
Ф48×5-10	Ф104×8.5	Ф152×10	Ф200×20
Ф50×8-12	Ф108×6-10	Ф152×12	Ф219×6-12
Ф51×10	Ф108×13	Ф152×14	Ф219×15
Ф55×10	Ф108×15	Ф152×20	Ф245×10
Ф57×6-10	Ф110×6	Ф152×6	Ф250×25
Ф60×6-12	Ф114×6-10	Ф152×8	Ф273×6-12
Ф65×6-12	Ф114×13	Ф159×6-10	Ф273×34
Ф68×6-12	Ф114×17.5	Ф159×12	Ф325×8-10
Ф70×8	Ф116×12	Ф159×15	Ф355×14
Ф70×10	Ф116×8	Ф159×18	Ф377×10
Ф76×6-12	Ф118×2	Ф159×22	Ф406×14
Ф80×8-12	Ф121×6-11	Ф168×10	Ф457×14
Ф83×8-12	Ф121×16	Ф168×12	Ф508×15

🟧 Chemical Composition (Base Material: Carbon Steel)

Element	Content (%)
C	≤ 0.25
Mn	≤ 1.20
Si	≤ 0.40
P	≤ 0.040
S	≤ 0.030

🟧 Mechanical Properties

Property	Value
Tensile Strength	≥ 330 MPa
Yield Strength	≥ 205 MPa
Elongation	≥ 20%
Hardness	≤ 90 HRB

🟧 Physical Properties

Property	Value
Density	7.85 g/cm³
Melting Range	1450–1520°C
Thermal Conductivity	54 W/m·K
Magnetic	Magnetic

🟧 Manufacturing Processes

• ERW welded pipe
• LSAW welded pipe
• SSAW spiral welded pipe
• Hot‑dip galvanizing
• Pre‑galvanizing
• Cutting, beveling, threading

🟧 Primary Industry Usage

• Structural frameworks and construction
• Fencing, guardrails, and handrails
• Greenhouses and agricultural structures
• Water and low‑pressure fluid pipelines
• Scaffolding and support systems
• Outdoor engineering and industrial applications

🟧 Why Use Galvanized Round Welded Pipe

• Excellent corrosion resistance
• Cost‑effective and widely available
• Smooth surface and uniform zinc coating
• Suitable for structural and fluid applications
• Long service life in outdoor environments

🟧 Why Choose WelSteels

• Full range of galvanized welded pipes
• Strict zinc coating and mechanical testing
• SGS / BV third‑party inspection available
• Custom cutting, threading, beveling
• Export‑grade seaworthy packaging
• Fast delivery from stock and mill production