EN 58H Grade Steel Pipes are seamless carbon steel pipes manufactured according to the EN 10216-2 standard. Designed for high-strength and medium-pressure applications, these pipes are widely used in industrial pipelines, boilers, water and gas transport, and structural frameworks. EN 58H pipes are manufactured with strict quality control, ensuring precise dimensions, consistent wall thickness, and uniform mechanical properties. Their high durability and reliability make them suitable for long-term industrial and infrastructure applications. The seamless design ensures superior performance compared to welded pipes.
EN 58H pipes are made from low-carbon steel with a carefully controlled chemical composition. Carbon content typically ranges from 0.18% to 0.23%, providing enhanced strength while maintaining good weldability. Manganese, silicon, phosphorus, and sulfur are present in regulated amounts to improve toughness and durability. Trace elements such as chromium and nitrogen enhance hardness and corrosion resistance. This composition ensures the pipes can withstand moderate pressures and temperatures in demanding industrial environments.
The pipes are produced using seamless pipe manufacturing techniques, where solid billets are pierced and elongated into uniform pipes. Hot working and cold finishing processes enhance mechanical properties and surface finish. Normalizing or stress-relief heat treatments ensure dimensional stability. Each pipe is inspected for defects, including ultrasonic testing and hydrostatic pressure tests. These processes guarantee EN 58H pipes meet international standards and perform reliably in critical applications.
EN 58H Grade Steel Pipes offer excellent mechanical performance. Tensile strength ranges from 480–620 MPa, yield strength ≥ 260 MPa, and elongation ≥ 20%. Impact toughness is 27 J at 20°C (Charpy V-notch), ensuring resistance to sudden shocks. Hardness typically does not exceed 160 HB, and the modulus of elasticity is approximately 210 GPa. These properties make the pipes suitable for medium-pressure pipelines and structural applications where strength and toughness are critical.
While EN 58H pipes are not stainless steel, they offer moderate corrosion resistance. Low phosphorus and sulfur levels reduce scaling and pitting. Protective coatings, galvanization, or painting can further enhance durability, making them suitable for outdoor or humid environments. Proper maintenance ensures a long service life, even in moderately corrosive industrial applications.
EN 58H pipes conform to EN 10216-2 standards, with diameters from 21.3 mm to 610 mm and wall thicknesses from 2 mm to 40 mm, depending on schedule. Standard lengths are 6 m or 12 m, with custom lengths available. Tight dimensional tolerances allow seamless integration with flanges, fittings, and valves. Accurate dimensions facilitate safe and efficient installation in pipelines and structural systems.
| Specification | Details |
|---|---|
| Standard | EN 10216-2 |
| Grade | EN 58H |
| 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 (depends on schedule) |
| Length | 6 m / 12 m or as per requirement |
| Surface Finish | Black / Painted / Galvanized |
| Mechanical Properties |
Tensile Strength: 480 – 620 MPa Yield Strength: ≥ 260 MPa Elongation: ≥ 20% |
| Test & Certification | Hydrostatic Test, Ultrasonic Test, Chemical & Mechanical Test Certificates |
| Applications | Pipelines, Water & Gas Transport, Boilers, Heat Exchangers, Structural Applications |
EN 58H pipes are widely used in power plants, chemical processing units, oil and gas industries, water treatment, and construction. They are ideal for pipelines, boilers, heat exchangers, and structural frameworks. Their high strength, moderate corrosion resistance, and uniform mechanical properties make them suitable for transporting liquids and gases under moderate pressures and temperatures.Heat treatment processes such as normalizing relieve internal stresses and enhance uniformity in EN 58H pipes. Depending on the application, annealing or quenching may be applied to improve ductility, toughness, and wear resistance. Heat treatment ensures that pipes maintain their structural integrity under temperature fluctuations and pressure variations.
EN 58H pipes are highly weldable 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 integrity. Proper welding techniques ensure strong joints suitable for medium-pressure fluid transport. Fabrication flexibility makes EN 58H pipes ideal for custom pipeline and industrial installations.EN 58H pipes have a smooth and defect-free surface finish. They are supplied in black, painted, or galvanized finishes to enhance corrosion resistance and aesthetics. A smooth interior improves fluid flow efficiency, while the uniform exterior ensures proper sealing with fittings and flanges. High-quality surface finish reduces maintenance requirements during long-term operation.
Every EN 58H pipe undergoes rigorous testing to meet EN 10216-2 standards. Tests include hydrostatic pressure, ultrasonic inspection, tensile and yield strength verification, impact tests, and chemical composition analysis. Non-destructive tests ensure pipes are free from internal defects. Comprehensive quality assurance guarantees reliability and safety for industrial applications.Proper storage and handling are critical for maintaining EN 58H pipe quality. Pipes should be stored in dry, ventilated areas and stacked to avoid deformation. Lifting should be done using cranes or forklifts to prevent damage. Protective coatings or wraps are recommended for long-term storage. Correct storage ensures pipes remain straight, clean, and ready for installation.
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.18 – 0.23 |
| 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) | 480 – 620 MPa |
| Yield Strength (ReH) | ≥ 260 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 |
| Standard | Equivalent Grade / Material |
|---|---|
| EN 10216-2 (Europe) | EN 58H |
| DIN (Germany) | St 45.8 / 1.0486 |
| BS (UK) | BS 3605 Grade 43H |
| ASTM (USA) | ASTM A106 Grade B / ASTM A53 Grade B |
| JIS (Japan) | STB 44 |
| IS (India) | IS 1239 Medium Class / IS 3589 |
| EN (Other European) | P265GH (similar mechanical properties) |
EN 58H Grade Steel Pipes are seamless carbon steel pipes manufactured as per EN 10216-2 standard. They are designed for high-strength and medium-pressure applications in pipelines, boilers, and structural systems.
EN 58H pipes contain Carbon 0.18–0.23%, Manganese 0.35–0.65%, Silicon 0.10–0.35%, Phosphorus ≤ 0.035%, Sulfur ≤ 0.035%, and trace Chromium and Nitrogen to enhance strength and toughness.
Tensile strength: 480–620 MPa, Yield strength: ≥ 260 MPa, Elongation: ≥ 20%, Impact toughness: 27 J at 20°C, Hardness: ≤ 160 HB, Modulus of Elasticity: ≈ 210 GPa.
EN 58H pipes are available in diameters from 21.3 mm to 610 mm, wall thicknesses from 2 mm to 40 mm, and standard lengths of 6 m or 12 m, with custom lengths available.
Yes, these pipes have excellent weldability due to their low carbon content. They can be welded manually or using automatic welding methods following standard procedures.
They are used in industrial pipelines, boilers, heat exchangers, water and gas transport, HVAC systems, fire protection, and structural frameworks.
EN 58H pipes offer moderate corrosion resistance. Galvanizing, painting, or other protective coatings can improve durability in humid or outdoor environments.
Equivalent grades include ASTM A106 Grade B, ASTM A53 Grade B (USA), BS 3605 Grade 43H (UK), DIN St 45.8 (Germany), JIS STB 44 (Japan), and IS 1239 Medium Class (India).
Testing includes hydrostatic testing, ultrasonic inspection, tensile and yield strength verification, impact tests, and chemical analysis to ensure compliance with EN 10216-2 standards.
Pipes should be stored in dry, ventilated areas, stacked properly to avoid deformation, and handled with cranes or forklifts. Protective coatings are recommended for long-term storage.
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