EN 58C Grade Steel Pipes are seamless carbon steel pipes manufactured according to the EN 10216-2 standard. These pipes are engineered for medium-pressure applications, ensuring high strength, uniform dimensions, and reliable performance. They are widely used in industrial pipelines, boilers, water and gas transport systems, and structural frameworks. EN 58C pipes combine durability, corrosion resistance, and excellent weldability. Their seamless construction ensures better strength and safety compared to welded pipes, making them ideal for critical applications.
EN 58C pipes are made from low-carbon steel with controlled chemical composition. Carbon content ranges from 0.14% to 0.19%, manganese from 0.35% to 0.65%, and silicon from 0.10% to 0.35%. Phosphorus and sulfur are maintained below 0.035% to enhance toughness and prevent scaling. Trace chromium and nitrogen provide moderate hardness and durability. This balanced composition ensures optimal strength and flexibility for pipelines and structural applications.
The pipes are produced using seamless pipe manufacturing techniques, including hot piercing and elongation of steel billets. Hot working, normalizing, and stress-relief treatments ensure dimensional accuracy and mechanical uniformity. Ultrasonic and hydrostatic testing verify the integrity of each pipe. The production process guarantees EN 58C pipes meet strict international standards for pressure, strength, and reliability.
EN 58C pipes offer excellent mechanical properties, including tensile strength of 420–550 MPa, yield strength ≥ 240 MPa, and elongation ≥ 20%. Impact toughness is typically 27 J at 20°C, and hardness does not exceed 160 HB. These properties make the pipes suitable for medium-pressure pipelines, industrial boilers, and structural applications where strength and durability are critical.
Although EN 58C pipes are carbon steel, they provide moderate corrosion resistance. Low phosphorus and sulfur contents reduce the risk of scaling and pitting. Galvanization, painting, or other surface coatings can improve protection in outdoor or humid environments. Proper maintenance ensures long-term durability and performance.EN 58C pipes comply with EN 10216-2 standards, available in diameters from 21.3 mm to 610 mm and wall thicknesses from 2 mm to 40 mm. Standard lengths are 6 m or 12 m, with custom lengths available upon request. Tight tolerances ensure compatibility with flanges, fittings, and valves. Accurate dimensions facilitate safe installation in pipelines and structural systems.
EN 58C pipes are widely used in power plants, chemical plants, oil and gas industries, water supply systems, and construction projects. They are suitable for pipelines, boilers, heat exchangers, and structural frameworks. Their strength and reliability make them ideal for transporting liquids and gases under moderate pressure and temperature conditions. Heat treatment processes, such as normalizing and stress relief, are applied to EN 58C pipes to relieve internal stresses and improve mechanical properties. Depending on application requirements, pipes may also undergo annealing or quenching to enhance ductility and toughness. Heat treatment ensures consistent performance under pressure and temperature variations.
| Specification | Details |
|---|---|
| Standard | EN 10216-2 |
| Grade | EN 58C |
| Type | Seamless Carbon Steel Pipes |
| Material | Low Carbon Steel |
| End Type | Plain End / Beveled End / Threaded End |
| Diameter Range | 21.3 mm – 610 mm (Outer Diameter) |
| Wall Thickness | 2.0 mm – 40 mm (depending on schedule) |
| Length | 6 m / 12 m or as per requirement |
| Surface Finish | Black / Painted / Galvanized |
| Mechanical Properties |
Tensile Strength: 420 – 550 MPa Yield Strength: ≥ 240 MPa Elongation: ≥ 20% |
| Test & Certification | Hydrostatic Test, Ultrasonic Test, Chemical & Mechanical Test Certificates |
| Applications | Pipelines, Water & Gas Transport, Boilers, Heat Exchangers, Structural Applications |
EN 58C pipes have excellent weldability due to low carbon content. They can be welded using manual, semi-automatic, or automatic methods. Pipes can be bent, flanged, or threaded without losing structural integrity. Proper welding ensures strong joints suitable for pipelines and industrial installations. EN 58C pipes feature smooth, defect-free surfaces. They are supplied in black, painted, or galvanized finishes to improve corrosion resistance and aesthetics. Smooth interior surfaces enhance fluid flow, while uniform exteriors ensure proper sealing with fittings and flanges. High-quality surface finish reduces maintenance requirements.
Each EN 58C pipe undergoes comprehensive testing, including hydrostatic pressure, ultrasonic inspection, mechanical testing, impact testing, and chemical analysis. Non-destructive tests ensure the pipes are free from internal defects. Rigorous quality control ensures compliance with EN 10216-2 standards, guaranteeing safety and reliability. Proper storage and handling are critical for maintaining the quality of EN 58C pipes. Pipes should be stored in dry, ventilated areas and stacked to avoid deformation. Handling with cranes or forklifts prevents damage. Protective coatings or wraps are recommended for long-term storage. Proper storage ensures pipes remain straight, clean, and ready for installation.
EN 58C pipes offer high strength, durability, and versatility for medium-pressure applications. They are cost-effective, provide moderate corrosion resistance, and comply with international standards. Standardized dimensions make installation easy, and their excellent weldability allows for flexible fabrication. Their consistent mechanical properties ensure reliable performance in pipelines and structural systems. EN 58C pipes fully comply with EN 10216-2 standards for seamless carbon steel pipes. Certification documents verify chemical composition, mechanical properties, and traceability. Compliance ensures safety, quality, and compatibility with global piping systems. EN 58C pipes are recognized internationally for industrial, construction, and infrastructure projects.
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.14 – 0.19 |
| Manganese (Mn) | 0.35 – 0.65 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Silicon (Si) | 0.10 – 0.35 |
| Chromium (Cr) | ≤ 0.30 |
| Nitrogen (N) | ≤ 0.012 |
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 420 – 550 MPa |
| Yield Strength (ReH) | ≥ 240 MPa |
| Elongation (A) | ≥ 20% |
| Impact Strength | 27 J at 20°C (Charpy V-notch) |
| Hardness | ≤ 160 HB |
| Modulus of Elasticity (E) | ≈ 210 GPa |
| Density | ≈ 7.85 g/cm³ |
| Nominal Diameter (DN) | Outer Diameter (OD) mm | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|
| 15 | 21.3 | 2.0 – 3.2 | 1.2 – 1.8 |
| 20 | 26.9 | 2.3 – 3.6 | 1.7 – 2.6 |
| 25 | 33.7 | 2.6 – 4.0 | 2.3 – 3.4 |
| 32 | 42.4 | 2.6 – 4.5 | 3.2 – 4.8 |
| 40 | 48.3 | 2.9 – 4.8 | 3.8 – 5.5 |
| 50 | 60.3 | 3.2 – 5.0 | 5.0 – 7.1 |
| 65 | 76.1 | 3.6 – 5.5 | 6.5 – 9.8 |
| 80 | 88.9 | 4.0 – 6.3 | 8.5 – 13.0 |
| 100 | 114.3 | 4.5 – 7.1 | 12.0 – 18.5 |
| 125 | 139.7 | 4.8 – 8.0 | 16.5 – 25.0 |
| 150 | 168.3 | 5.0 – 8.8 | 22.0 – 32.0 |
| 200 | 219.1 | 5.6 – 9.5 | 33.0 – 51.0 |
| 250 | 273.0 | 6.3 – 11.0 | 51.0 – 81.0 |
| 300 | 323.9 | 7.1 – 12.5 | 72.0 – 111.0 |
| 350 | 355.6 | 7.6 – 14.0 | 90.0 – 140.0 |
| 400 | 406.4 | 8.0 – 15.0 | 115.0 – 180.0 |
| Nominal Diameter (DN) | Outer Diameter (OD) mm | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|
| 15 | 21.3 | 2.0 – 3.2 | 1.2 – 1.8 |
| 20 | 26.9 | 2.3 – 3.6 | 1.7 – 2.6 |
| 25 | 33.7 | 2.6 – 4.0 | 2.3 – 3.4 |
| 32 | 42.4 | 2.6 – 4.5 | 3.2 – 4.8 |
| 40 | 48.3 | 2.9 – 4.8 | 3.8 – 5.5 |
| 50 | 60.3 | 3.2 – 5.0 | 5.0 – 7.1 |
| 65 | 76.1 | 3.6 – 5.5 | 6.5 – 9.8 |
| 80 | 88.9 | 4.0 – 6.3 | 8.5 – 13.0 |
| 100 | 114.3 | 4.5 – 7.1 | 12.0 – 18.5 |
| 125 | 139.7 | 4.8 – 8.0 | 16.5 – 25.0 |
| 150 | 168.3 | 5.0 – 8.8 | 22.0 – 32.0 |
| 200 | 219.1 | 5.6 – 9.5 | 33.0 – 51.0 |
| 250 | 273.0 | 6.3 – 11.0 | 51.0 – 81.0 |
| 300 | 323.9 | 7.1 – 12.5 | 72.0 – 111.0 |
| 350 | 355.6 | 7.6 – 14.0 | 90.0 – 140.0 |
| 400 | 406.4 | 8.0 – 15.0 | 115.0 – 180.0 |
EN 58C Grade Steel Pipes are seamless carbon steel pipes manufactured according to EN 10216-2 standards. They are designed for medium-pressure applications in pipelines, boilers, heat exchangers, and structural frameworks.
EN 58C pipes contain Carbon 0.14–0.19%, Manganese 0.35–0.65%, Silicon 0.10–0.35%, Phosphorus ≤ 0.035%, Sulfur ≤ 0.035%, with trace amounts of Chromium and Nitrogen for strength and toughness.
Tensile strength: 420–550 MPa, Yield strength: ≥ 240 MPa, Elongation: ≥ 20%, Impact toughness: 27 J at 20°C, Hardness: ≤ 160 HB, Modulus of Elasticity: ≈ 210 GPa.
Diameters range from 21.3 mm to 610 mm, with wall thicknesses from 2 mm to 40 mm. Standard lengths are 6 m or 12 m, with custom lengths available on request.
Yes, EN 58C pipes have excellent weldability due to low carbon content. They can be welded using manual, semi-automatic, or automatic methods while maintaining structural integrity.
These pipes are used in pipelines for water, gas, and oil, boilers, heat exchangers, structural supports, and industrial process plants requiring medium-pressure steel pipes.
EN 58C pipes provide moderate corrosion resistance. Galvanization, painting, or other protective coatings can be applied to improve durability in humid or outdoor environments.
Equivalent grades include ASTM A106 Grade B, ASTM A53 Grade B (USA), BS 3605 Grade 33C (UK), DIN St 37.0 (Germany), JIS STB 42 (Japan), and IS 1239 Medium Class (India).
Testing includes hydrostatic tests, ultrasonic inspection, tensile and yield strength tests, impact tests, and chemical analysis to ensure compliance with EN 10216-2 standards.
Pipes should be stored in dry, ventilated areas, stacked carefully to avoid deformation, and handled with cranes or forklifts. Protective coatings are recommended for long-term storage.
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