EN 10219 S235JR Welded Round Steel Pipe 219.1mm OD 6.0mm WT for Structure

Our EN 10219 S235JR Welded Round Steel Pipe is a structural-grade Cold Formed Welded Structural Hollow Section (CHS) engineered specifically for high-load structural and mechanical engineering applications. Developed with a nominal Outer Diameter of 219.1mm and a Wall Thickness of 6.0mm, this circular hollow section provides an optimal balance of structural strength, excellent weldability, and outstanding cost-efficiency.
Manufactured in strict compliance with European Standard EN 10219-1 and EN 10219-2, this pipe serves as a dependable choice for modern construction, infrastructure projects, and industrial manufacturing systems worldwide.

Product Features & Advantages

Robust Structural Integrity: Featuring a 219.1 mm Outer Diameter and a heavy 6.0 mm wall thickness, this Circular Hollow Section (CHS) delivers uniform multi-directional resistance to bending, torsion, and buckling under heavy structural loads.

Superior Weldability: Thanks to the optimized, low-carbon chemical composition of the S235JR structural steel grade, this pipe offers excellent weldability for rapid on-site field assembly, ensuring reliable, high-strength joints without pre-heating.

High-Frequency ERW Seam Reliability: Manufactured using advanced High-Frequency Electric Resistance Welding (HF-ERW), the longitudinal weld seam undergoes post-weld induction heat treatment to eliminate internal stresses and ensure full parent-metal strength.

Precise Dimensional Tolerances: Produced strictly via precision cold-forming processes compliant with EN 10219-2, ensuring superior outer diameter concentricity, precise wall uniformity, and absolute straightness for architectural alignment.

Versatile Protective Coatings: Available in a variety of surface finishes—including standard rust-preventative black paint/varnish, anti-corrosion light oiling, or long-term outdoor Hot-Dipped Galvanized (HDG) treatments to withstand harsh industrial and coastal environments.

Technical Specifications

Parameter	Specification
Standard	EN 10219-1 & EN 10219-2 (Cold formed welded structural hollow sections)
Steel Grade	S235JR (S: Structural Steel; 235: Min. Yield Strength 235 MPa; JR: Impact test at 20°C)
Nominal Size	219.1 mm OD × 6.0 mm WT
Outer Diameter (OD)	219.1 mm (Tolerance: ±1% with a minimum of ±0.5 mm)
Wall Thickness (WT)	6.0 mm (Tolerance: ±10%)
Section Shape	Circular Hollow Section (CHS) / Round Pipe
Manufacturing Process	Longitudinally Welded / ERW (Electric Resistance Welded)
Surface Treatment	Bare/Oiled, Black Paint/Varnish, or Hot-Dipped Galvanized (HDG)
End Finishing	Plain Ends (PE) or Beveled Ends (BE) for easy structural welding

Product Applications

Thanks to its robust mechanical geometry and dependable S235JR steel composition, this 219.1mm structural round pipe is widely utilized in heavy-duty engineering fields:

Steel Frameworks & Building Structures: Acts as primary load-bearing columns, truss members, and lattice structural components in industrial workshops, warehouses, airports, and sports stadiums.

Piling & Foundation Engineering: Widely used as micro-piles, foundation steel casings, and retaining wall supports in civil engineering and bridge construction.

Infrastructure & Machinery Manufacturing: Integrated into the manufacturing of heavy machinery frames, crane booms, transport gantries, and large-scale industrial equipment chassis.

Civil & Architectural Engineering: Perfect for highway sign bridge gantries, pedestrian handrails, platform supports, architectural canopies, and temporary scaffolding systems.

Solar Tracker Support Structures: Utilized as structural torque tubes and heavy mounting piles in large utility-scale solar farms.

Rigorous Quality Control & Manufacturing Process

To ensure compliance with European standards and structural engineering safety codes, our EN 10219 structural pipes undergo rigorous testing:

Weld Seam Integrity: Continuous online heat treatment (seam annealing) to normalize the structure, followed by automated Ultrasonic Testing (UT) across 100% of the longitudinal weld seam.

Impact Testing (JR Grade): Standard Charpy V-notch impact testing to verify the material absorbed energy (minimum 27 Joules at +20°C), ensuring adequate fracture resistance.

Dimensional Verification: Every tube is verified for outer diameter tolerances (within ±1% limit), wall thickness consistency, and straightness to comply with EN 10219-2.

Material Certification: Every shipment is backed by a Mill Test Certificate (MTC) conforming to EN 10204 3.1, verifying chemical heat analysis and mechanical tensile testing values.

Frequently Asked Questions (FAQ)

Q: What does the designation “S235JR” mean according to EN 10219?

A: This designation defines the specific structural classification under the European standard:
S (Structural): Indicates that the pipe is strictly engineered for load-bearing and structural
applications.
235: Represents the minimum yield strength of 235 MPa for wall thicknesses ≤ 16mm.
JR: Indicates that the steel has undergone longitudinal Charpy V-notch impact testing at a temperature of +20°C with a minimum absorbed energy of 27 J.

Q: Why choose a 219.1mm×6.0mm Circular Hollow Section (CHS) for structures?

A: Circular steel pipes offer magnificent cross-sectional properties. The symmetric geometry of a round pipe provides uniform resistance to bending and twisting forces from all directions. With a 6.0mm robust wall thickness, this specific size offers exceptional buckling resistance and loading capacity while remaining lighter than solid steel profiles, drastically reducing the total steel weight of your building.

Q: What is the difference between EN 10219 and EN 10210?

A: The primary difference lies in the manufacturing temperature and internal stress profiles:
EN 10219 specifies Cold Formed welded structural hollow sections. The steel is shaped atroom temperature, which gives it a high surface finish and tight dimensional tolerances.
EN 10210 specifies Hot Finished structural hollow sections. The steel is formed at elevatedtemperatures, resulting in uniform metallurgical grain structures and zero residual cold-forming stresses.
For the majority of standard building frameworks, EN 10219 S235JR is highly preferred due toits superior cost-effectiveness.