EN 10217 Welded Steel Tubes
EN 10217 Welded Steel Tubes
EN 10217 Welded Steel Tubes are steel tubes manufactured to the EN 10217 standard, which specifies requirements for welded steel tubes for pressure purposes. These tubes are used in industries such as boilers, heat exchangers, pressure vessels, and pipeline systems.
| Specification | Details |
| Standard | EN 10217 |
| Product Name | Welded Steel Tubes |
| Manufacturing Process | Electric Resistance Welded (ERW), Submerged Arc Welded (SAW) |
| Material Grades | P195TR1/TR2, P235TR1/TR2, P265TR1/TR2, 16Mo3, 13CrMo4-5, 10CrMo9-10 |
| Dimensions | Outer Diameter: 21.3mm – 1219mm (Customized on request) |
| Wall Thickness | 1.5mm – 50mm |
| Length | 6m, 12m, or Custom Cut Lengths |
| Surface Finish | Black, Galvanized, Painted, or as required |
| End Finish | Plain Ends, Beveled Ends, Threaded & Coupled |
| Applications | Pressure Vessels, Boilers, Heat Exchangers, Power Plants, Petrochemical & Refineries |
EN 10217 1, 2, 3, 4, 5, 6, 7 Chemical Composition
| Grade | C (Max) | Si (Max) | Mn (Max) | P (Max) | S (Max) | Cr (Max) | Mo (Max) | Ni (Max) | Al (Min) | Other Elements |
| EN 10217-1 (P195TR1/TR2) | 0.13 | 0.35 | 0.7 | 0.025 | 0.02 | – | – | – | – | – |
| EN 10217-1 (P235TR1/TR2) | 0.16 | 0.35 | 1.2 | 0.025 | 0.02 | – | – | – | – | – |
| EN 10217-1 (P265TR1/TR2) | 0.22 | 0.4 | 1.4 | 0.025 | 0.02 | – | – | – | – | – |
| EN 10217-2 (P195GH) | 0.15 | 0.35 | 0.7 | 0.025 | 0.02 | 0.3 | 0.08 | 0.3 | – | – |
| EN 10217-2 (P235GH) | 0.16 | 0.35 | 1.2 | 0.025 | 0.02 | 0.3 | 0.08 | 0.3 | – | – |
| EN 10217-2 (P265GH) | 0.2 | 0.4 | 1.4 | 0.025 | 0.02 | 0.3 | 0.08 | 0.3 | – | – |
| EN 10217-3 (P275NH) | 0.22 | 0.4 | 1.5 | 0.025 | 0.02 | 0.3 | 0.08 | 0.3 | – | – |
| EN 10217-4 (P265NL) | 0.22 | 0.4 | 1.5 | 0.025 | 0.02 | 0.3 | 0.08 | 0.3 | – | – |
| EN 10217-5 (P355NL1) | 0.2 | 0.5 | 1.7 | 0.025 | 0.02 | 0.3 | 0.08 | 0.3 | – | – |
| EN 10217-6 (X10CrMoVNb9-1) | 0.1 | 0.5 | 0.6 | 0.02 | 0.01 | 8.0-9.5 | 0.85-1.05 | 0.3 | – | V: 0.20, Nb: 0.06 |
| EN 10217-7 (X2CrNi18-9) | 0.03 | 1 | 2 | 0.045 | 0.015 | 17.0-19.0 | – | 8.0-10.5 | – | – |
EN 10217 1, 2, 3, 4, 5, 6, 7 Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact Strength (J) |
| EN 10217-1 (P195TR1/TR2) | 195 min | 320 – 440 | 27 | – |
| EN 10217-1 (P235TR1/TR2) | 235 min | 360 – 500 | 25 | – |
| EN 10217-1 (P265TR1/TR2) | 265 min | 410 – 570 | 23 | – |
| EN 10217-2 (P195GH) | 195 min | 320 – 440 | 27 | – |
| EN 10217-2 (P235GH) | 235 min | 360 – 500 | 25 | – |
| EN 10217-2 (P265GH) | 265 min | 410 – 570 | 23 | – |
| EN 10217-3 (P275NH) | 275 min | 430 – 580 | 22 | 40 J at -20°C |
| EN 10217-4 (P265NL) | 265 min | 410 – 570 | 22 | 40 J at -40°C |
| EN 10217-5 (P355NL1) | 355 min | 490 – 630 | 22 | 27 J at -40°C |
| EN 10217-6 (X10CrMoVNb9-1) | 275 min | 440 – 600 | 20 | – |
| EN 10217-7 (X2CrNi18-9) | 200 min | 500 – 700 | 40 | – |
EN 10217 1, 2, 3, 4, 5, 6, 7 Physical Properties
| Property | EN 10217-1 to 5 (Carbon Steel) | EN 10217-6 (Alloy Steel) | EN 10217-7 (Stainless Steel) |
| Density (g/cm³) | 7.85 | 7.85 | 7.9 |
| Thermal Conductivity (W/m·K) | 50-55 | 26-30 | 15-25 |
| Specific Heat (J/kg·K) | 450-500 | 500 | 500 |
| Electrical Resistivity (µΩ·m) | 0.12-0.15 | 0.25 | 0.75 |
| Melting Point (°C) | 1450 | 1400-1450 | 1400-1450 |
EN 10217 Standard & Grades
- EN 10217-1 – Non-alloy steel tubes with specified room temperature properties. Grades: P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2
- EN 10217-2 – Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties. Grades: P195GH, P235GH, P265GH, 16Mo3
- EN 10217-3 – Alloy fine grain steel tubes with specified room temperature properties. Grades: P275N, P355N, P460N
- EN 10217-4 – Electric welded fine grain steel tubes with specified low-temperature properties. Grades: P215NL, P265NL, P355NL1, P355NL2
- EN 10217-5 – Welded stainless steel tubes. Grades: 1.4301, 1.4306, 1.4401, 1.4404, 1.4571 (Common stainless steel grades)
- EN 10217-6 – Welded tubes of fine grain steels with high proof strength. Grades: P355QH, P460QH
- EN 10217-7 – Welded stainless steel tubes for pressure purposes. Grades: 1.4301, 1.4307, 1.4401, 1.4404, 1.4435, 1.4571, 1.4541 (Similar to EN 10217-5 but for pressure applications)
Manufacturing Process
1. Raw Material Selection
- Steel coils or plates (Hot Rolled or Cold Rolled)
- Non-alloy, alloy, or stainless steel based on the required grade
- The material is checked for chemical composition and mechanical properties.
2. Tube Formation (Cold or Hot Forming)
- The steel strip or plate is shaped into a cylindrical form using either a cold-forming or hot-forming process.
- The edges of the strip/plate are prepared for welding.
3. Welding Process
Different welding techniques are used depending on the specific EN 10217 part and steel grade:
- Electric Resistance Welding (ERW) – Used in EN 10217-1, EN 10217-2, EN 10217-3, EN 10217-4
- Submerged Arc Welding (SAW) – Used for thicker pipes in EN 10217-2, EN 10217-3, EN 10217-4, EN 10217-6
- Gas Tungsten Arc Welding (GTAW/TIG) or Plasma Arc Welding (PAW) – Used in EN 10217-5, EN 10217-7 (stainless steel pipes)
4. Heat Treatment (if required)
- Some grades require post-weld heat treatment (PWHT) to relieve stress and improve mechanical properties.
- Common heat treatments include normalizing, annealing, or quenching & tempering (for fine-grain steels).
5. Surface Finishing
- Pickling, passivation, or shot blasting for improved corrosion resistance (stainless steel pipes).
- Oil coating or painting for carbon steel pipes to prevent rust.
6. Dimensional and Mechanical Testing
- Dimensional checks (outer diameter, thickness, length, straightness).
- Non-destructive testing (NDT) such as ultrasonic testing (UT), radiographic testing (RT), or Eddy current testing.
- Hydrostatic Testing – Pressure test to ensure no leakage.
- Tensile, impact, and hardness testing as per EN 10217 specifications.
Application
- Boilers & Heat Exchangers
- Pressure Vessels & Pipelines
- Chemical & Petrochemical Industries
- Construction & Structural Applications
- District Heating & HVAC Systems