EN 10219 ERW Pipe
EN 10219 ERW Pipe
The EN 10219 specification covers cold-formed welded structural hollow sections of non-alloy and fine grain steels. Electric Resistance Welded (ERW) pipes are one type of product under this standard.
Scope and Application
- Scope: EN 10219 specifies the technical delivery conditions for cold-formed welded structural hollow sections of non-alloy and fine grain steels.
- Application: These pipes are commonly used in construction and structural applications, including building frameworks, bridges, and other structures requiring high strength and durability.
Manufacturing Process
- Electric Resistance Welded (ERW) Pipe: ERW pipes are manufactured by cold forming a steel strip into a cylindrical shape. The longitudinal edges are then welded together using an electric resistance welding process to create a continuous seam.
Grades and Chemical Composition
| Grade | C (max) | Mn (max) | P (max) | S (max) | Si (max) |
|---|---|---|---|---|---|
| S235J0H | 0.17% | 1.40% | 0.040% | 0.040% | 0.50% |
| S275J0H | 0.20% | 1.50% | 0.035% | 0.035% | 0.50% |
| S275JRH | 0.20% | 1.50% | 0.040% | 0.040% | 0.50% |
| S275J2H | 0.20% | 1.50% | 0.030% | 0.030% | 0.50% |
| S355J0H | 0.22% | 1.60% | 0.035% | 0.035% | 0.50% |
| S355JRH | 0.22% | 1.60% | 0.035% | 0.035% | 0.50% |
| S355J2H | 0.22% | 1.60% | 0.030% | 0.030% | 0.50% |
Mechanical Properties
| Grade | Yield Strength (min) | Tensile Strength (min) | Impact Energy (J) at Specified Temperature |
|---|---|---|---|
| S235J0H | 235 MPa | 360-510 MPa | 27 J at 0°C |
| S275J0H | 275 MPa | 430-580 MPa | 27 J at 0°C |
| S275JRH | 275 MPa | 430-580 MPa | 27 J at Room Temperature |
| S275J2H | 275 MPa | 430-580 MPa | 27 J at -20°C |
| S355J0H | 355 MPa | 470-630 MPa | 27 J at 0°C |
| S355JRH | 355 MPa | 470-630 MPa | 27 J at Room Temperature |
| S355J2H | 355 MPa | 470-630 MPa | 27 J at -20°C |
Dimensional Specifications
EN 10219 ERW pipes come in various outer diameters (OD) and wall thicknesses (Schedule), which define the pipe’s structural integrity and suitability for different applications.
Outer Diameter (OD)
| Outer Diameter (OD) | Tolerance |
|---|---|
| ≤ 48.3 mm | ± 0.4 mm |
| > 48.3 mm to ≤ 114.3 mm | ± 0.75% of OD |
| > 114.3 mm | ± 1% of OD |
Wall Thickness (Schedule)
The wall thickness tolerance is generally ±10% of the specified nominal wall thickness.
| Wall Thickness (Schedule) | Tolerance |
|---|---|
| ≤ 5 mm | ± 0.5 mm |
| > 5 mm to ≤ 10 mm | ± 1.0 mm |
| > 10 mm | ± 1.5 mm |
Length and End Finish
- Standard Lengths: Typically range from 6 to 12 meters, but custom lengths can be provided upon request.
- End Finish: Pipes can be supplied with plain ends, beveled ends, or threaded ends according to the application requirements.
Dimensional Tolerances
- Diameter: Tolerances depend on the size and thickness of the pipe and are detailed in the EN 10219 standard.
- Wall Thickness: Typically, the wall thickness tolerance is ±10% of the specified nominal wall thickness.
Length and End Finish
- Standard Lengths: Typically range from 6 to 12 meters, but custom lengths are available upon request.
- End Finish: Pipes can be plain-ended, beveled, or threaded according to the application requirements. End protection can be provided to prevent damage during handling and transportation.
Testing and Inspection
- Tensile Test: Required to ensure compliance with mechanical property requirements.
- Impact Test: Required for certain grades and thicknesses to ensure toughness at specified temperatures.
- Visual Inspection: Each pipe is inspected for surface defects and straightness.
- Dimensional Checks: Ensuring the pipe meets specified dimensional tolerances.
Marking
Each pipe must be legibly marked with:
- Manufacturer’s name or trademark.
- Specification number (EN 10219).
- Grade of steel.
- Size and thickness.
- Heat number or other identifiers to ensure traceability.
Coating and Protection
- Coating Options: Pipes can be supplied with various coatings such as galvanized or painted to prevent corrosion.
- End Protection: Pipes can be supplied with caps or other means to protect the ends during handling and transport.
Applications
EN 10219 ERW pipes are used in various structural applications:
- Construction: Building frameworks, columns, and beams.
- Infrastructure: Bridges and other civil engineering projects.
- Mechanical Structures: Machinery, automotive, and other equipment requiring high strength.
Environmental and Safety Considerations
- Handling: Proper handling procedures must be followed to prevent injuries and damage.
- Storage: Pipes should be stored in a dry, well-ventilated area to prevent corrosion.
Documentation and Compliance
- Certification: Each shipment is accompanied by the necessary documentation, including test reports and certificates of compliance with EN 10219 standards.
- Traceability: Pipes are marked and documented to ensure full traceability from the manufacturer to the end user.
Summary
EN 10219 ERW pipes are essential for structural applications requiring high strength and durability. The standard ensures that the pipes meet specific mechanical and chemical requirements, making them suitable for use in construction, civil engineering, and various other industries.
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