EN 10025-2 Hot Rolled Structural Steel Tube

Grades S235, S275, S355 – Quality JR, J0, J2 – CE Marking Available

Product Overview

EN 10025-2 hot rolled non-alloy structural steel tubes for construction, bridges, cranes, and general engineering applications. CE marking available under CPR.

Grades: S235, S275, S355 (most popular)
Quality Grades: JR (+20°C), J0 (0°C), J2 (-20°C)
OD: 21.3mm – 508mm | WT: 2.0mm – 60mm

✅ EN 10025-2:2019 – current European standard
✅ Hot rolled – cost-effective for large quantities
✅ Good weldability and machinability
✅ J2 quality – impact tested at -20°C for cold climates
✅ CE marking available – CPR compliant
✅ EN 10204 3.1 MTC with heat number

Grade Selection – Structural Applications

Most Popular Sizes – S355J2

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Heat Exchanger U-Bend Tube – ASTM A179

U-Bend Heat Exchanger Tube

ASTM A179 | Seamless Cold Drawn | U-Bends for Floating Head HE

Product Overview

Our U-bend tubes are manufactured from ASTM A179 seamless cold-drawn low carbon steel, specifically designed for floating head heat exchangers where tube bundle removal is required.

✅ OD range – 5mm – 256mm
✅ Wall thickness – 0.8mm – 3mm
✅ Min bend radius – 1.5 × OD (typical)
✅ Leg length tolerance – ±1.6mm
✅ Stress relieved after bending

Key Specifications

Applications

• Floating head heat exchangers

• U-tube heat exchangers

• Condensers (U-bend type)

• Chemical process heaters

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EN 10210-1 Hot Finished Structural Hollow Sections

Non-Alloy and Fine Grain Steels – S235, S275, S355, S420 – Circular, Square, Rectangular

Product Overview

EN 10210-1 hot finished structural hollow sections for construction, bridges, cranes, and offshore applications. CE marking available under CPR.

Grades: S235, S275, S355 (most popular) , S420, S460
Quality: JR, J0, J2, N, NL
Shapes: Circular (CHS), Square (SHS), Rectangular (RHS)

✅ EN 10210-1 – hot finished (stress-relieved)
✅ Seamless or welded options
✅ S355J2H – high strength with -20°C impact toughness
✅ S420NH – 420 MPa yield fine grain
✅ CE marking available – CPR compliant
✅ EN 10204 3.1 MTC with heat number

Grade Selection – Structural Applications

Most Popular Sizes – S355J2H

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Alloy Steel Pipe – ASTM A335 P11 / P22 / P91

Chrome Moly Alloy Steel Pipe

ASTM A335 P11, P22, P91 | High Temperature Service | OD 5-256mm

Product Overview

Our chrome moly alloy steel pipe to ASTM A335 (P11, P22, P91) is designed for high temperature and high pressure service in refineries, power plants, and petrochemical facilities.

✅ Seamless – No weld seam for creep strength
✅ Grades – P11 (1.25Cr-0.5Mo), P22 (2.25Cr-1Mo), P91 (9Cr-1Mo-V)
✅ OD range – 5mm – 256mm
✅ WT range – 2mm – 20mm
✅ Heat treated – Normalized + tempered (P91)

Key Specifications

Applications

• Main steam lines

• High temperature headers

• Refinery heater tubes

• Superheater outlet piping

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ERW Welded Pipe

Electric Resistance Welded – OD 5mm – 256mm | WT 0.8mm – 12mm

Carbon Steel – ASTM A53 / API 5L / EN 10217 / GB/T 3091

Product Overview

Our ERW (Electric Resistance Welded) steel pipe is manufactured by cold forming a steel coil into a cylindrical shape and welding the seam using high-frequency electric resistance welding. This process produces a pipe with a consistent weld seam, excellent dimensional accuracy, and cost-effectiveness for general applications.

With outer diameters from 5mm to 256mm and wall thicknesses from 0.8mm to 12mm, our ERW pipes are ideal for water, gas, oil transmission, structural applications, and low to medium pressure services.

Key Features:

• ERW process – High-frequency electric resistance welded

• Cost-effective – Lower price than seamless pipe

• Consistent quality – Automated production line

• Wide size range – OD 5-256mm – one-stop sourcing

• Good weldability – Easy field welding

• 100% hydrostatic tested – Guaranteed integrity

• Full traceability – EN 10204 Type 3.1 MTC with heat number

✅ ERW manufacturing – Cost-effective alternative to seamless
✅ Smooth surface – Clean, scale-free finish
✅ Good formability – Suitable for bending, grooving, threading
✅ Fast delivery – Stock sizes ready to ship
✅ Factory direct | Global shipping

Key Specifications

Standards & Grades

Chemical Composition (Typical – Grade B / Q235B)

💡 Low carbon content ensures excellent weldability for field joining.

Mechanical Properties (Typical – Grade B / Q235B)

Available Sizes – ERW Pipe

💡 Most popular sizes: 21.3mm, 26.9mm, 33.7mm, 42.4mm, 48.3mm, 60.3mm, 76.1mm, 88.9mm, 114.3mm, 168.3mm, 219.1mm OD

Grade Selection Guide

Applications by Industry

Advantages of ERW Pipe

ERW vs Seamless – Comparison

Quality Assurance & Testing

Mill Test Certificate

• EN 10204 Type 3.1 MTC – Standard

• EN 10204 Type 3.2 – Available upon request (SGS, BV, TUV)

• Traceability: Full traceability from coil to finished pipe

Processing Services

Packaging & Shipping

Why Choose Our ERW Welded Pipe?

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Please provide the following details:

• Standard : ASTM / API / EN / GB / Other _______

• Grade : _______

• OD (mm) : _______

• WT (mm) : _______

• Length (m) : _______

• Quantity : _______ (pieces / meters / tons)

• Application : _______

• End Finish : Plain / Beveled / Threaded / Grooved

• Coating : Black / Oiled / Galvanized / 3LPE / None

• Inspection : Standard / Third-party (SGS/BV/TUV)

ASTM A178 ERW Welded Carbon Steel Tube Supplier

For Boiler & Superheater Service – OD 6~204mm | WT 1~18mm

Product Overview

Our ASTM A178 / ASME SA178 welded (ERW) carbon steel tubes are specifically designed for boiler and superheater service at low to medium pressures. Manufactured by electric resistance welding (ERW) with no filler metal addition, these tubes offer a cost-effective alternative to seamless boiler tubes for non-critical applications.

Key Specifications:

• Standard: ASTM A178 / ASME SA178

• Manufacturing: ERW (Electric Resistance Welded – no filler metal)

• Grades: A (Low Carbon), C (Medium Carbon), D (Carbon-Manganese)

• Outer Diameter: 6mm – 204mm (Standard Stock: 19mm – 89mm)

• Wall Thickness: 1mm – 18mm

• Length: 3m – 12m (Custom lengths available)

• Heat Treatment: Normalized after welding – stress relieved weld seam

✅ ASTM A178 certified – Compliant with ASME Boiler & Pressure Vessel Code Section II
✅ ERW manufacturing – Cost-effective alternative to seamless
✅ Heat treated after welding – Stress relieved weld seam – uniform properties
✅ Multiple grades – A (general), C (higher strength), D (highest strength)
✅ 100% hydrostatic or NDT tested – Guaranteed integrity
✅ EN 10204 Type 3.1 MTC provided with heat number
✅ Factory direct – Competitive pricing and fast delivery

Grade Selection

💡 Grade A is the most economical for general boiler service. Grade C and D provide higher strength for more demanding applications.

Chemical Composition

Mechanical Properties

📌 Mechanical properties apply to Grades C and D. Grade A is typically used for general service where specific strength requirements are not critical.

Manufacturing Process – ERW (Electric Resistance Welding)

ERW Process Highlights:

1. Steel coil – The starting material is high-quality carbon steel strip

2. Forming – The strip is roll-formed into a cylindrical shape

3. ERW welding – High-frequency electric resistance welding (no filler metal)

4. Heat treatment – Normalized after welding – stress relieves the weld seam

5. Sizing – Final diameter achieved by passing through sizing rolls

6. 100% NDT testing – Weld seam inspection and hydrostatic test

ASTM A178 vs Seamless Boiler Tubes (SA192/SA179)

💡 Choose ASTM A178 for budget-conscious projects where pressure requirements are moderate and seamless tubes are not specified.

Key Applications

Why Choose Our ASTM A178 ERW Tubes?

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