Home > Welded Tubes > EN 10217-7 Stainless Steel Welded Tubes
Pressure-rated welded tubes for industrial, energy & process systems
EN 10217-7 is the European standard covering welded stainless steel tubes for pressure purposes. These tubes are engineered to handle pressure, temperature, and corrosion simultaneously—making them a preferred choice across process plants, power stations, refineries, utilities, and HVAC systems.
INOX STEEL INDIA supplies EN 10217-7 tubes in both austenitic and ferritic stainless steels, enabling engineers to select the most cost-effective grade without compromising safety or performance.
They are factory-welded stainless steel tubes manufactured with controlled welding, heat treatment, and testing to meet pressure-service requirements defined by European norms.
Key characteristics include:
Used in: Process piping • heat exchangers • steam lines • chemical plants • refineries
Used in: Power plant components • exhaust systems • heat recovery units • utility piping
Unlike ornamental standards, EN 10217-7 is specifically designed for pressure service.
| Feature | EN 10217-7 | ASTM A269 | ASTM A249 |
|---|---|---|---|
| Primary Use | Pressure service | Instrumentation | Heat exchangers |
| Pressure Rating | Yes | ❌ Not pressure-rated | Yes |
| Grade System | EN (1.xxxx) | UNS | UNS |
| Regional Preference | Europe / EPC projects | Global | Global |
Power & Energy
Oil, Gas & Refineries
Chemical & Process Plants
HVAC & Utilities
Industrial Manufacturing
Welded Stainless Steel Tubes for Pressure Purposes
| Section | Parameter | Technical Specification — EN 10217-7 Welded Tubes |
|---|---|---|
| Standard | Specification | EN 10217-7 — Welded steel tubes for pressure purposes (stainless steels) |
| Material Class | Austenitic SS | 1.4301 (304), 1.4307 (304L), 1.4401 (316), 1.4404 (316L), 1.4541 (321), 1.4550 (347) |
| Ferritic SS | 1.4512 (409), 1.4016 (430), 1.4521 (444) | |
| Product Form | Tube Type | Welded stainless steel tubes |
| Surface Condition | As-welded / Pickled & Passivated | |
| Manufacturing Process | Welding | TIG / Plasma / Laser / High-frequency welding |
| Weld Bead | Bead removed or bead rolled | |
| Heat Treatment | Solution annealed (austenitic) / Annealed (ferritic) | |
| Dimensional Range | Outside Diameter (OD) | 8 mm – 610 mm |
| Wall Thickness (WT) | 0.8 mm – 12.5 mm | |
| Length | 6 m / 12 m / cut-to-length | |
| Mechanical Properties (Typical) | Tensile Strength | Austenitic: 515–720 MPa • Ferritic: 430–550 MPa |
| Yield Strength | Austenitic: ≥ 205 MPa • Ferritic: ≥ 275 MPa | |
| Elongation | Austenitic ≥ 35% • Ferritic ≥ 20% | |
| Pressure Performance | Service | Suitable for pressure, temperature & corrosion environments |
| Corrosion Resistance | Austenitic | Excellent general corrosion resistance |
| Ferritic | Good resistance to oxidation & stress corrosion | |
| Testing Requirements | Mandatory | Eddy Current / Hydrostatic / Dimensional |
| Optional | UT, RT (weld), PMI | |
| End Finish | Tube Ends | Plain / Beveled / Deburred |
| Surface Finish | Pickled, passivated, polished (if required) | |
| Typical Applications | Pressure Systems | Boilers, heat exchangers, pressure piping |
| Industrial | Process plants, refineries, power stations | |
| Utilities | Steam, gas & fluid transfer | |
| HSN Code | Stainless Tubes | 73064000 |
Standard OD × WT Range (Pressure & Process Service)
| Outside Diameter (OD) | Wall Thickness (WT) | Typical Applications |
|---|---|---|
| 8 – 19 mm | 0.8 – 1.5 mm | Instrumentation, impulse & sampling lines |
| 19 – 38 mm | 1.0 – 2.5 mm | Heat exchangers, condensers |
| 38 – 60 mm | 1.5 – 4.0 mm | Process & utility piping |
| 60 – 114 mm | 2.0 – 6.0 mm | Steam, gas & pressure lines |
| 114 – 610 mm | 3.0 – 12.5 mm | Headers, skids, plant piping |
Standard Lengths: 6 m / 12 m | Special Supply: Cut-to-length as per EPC drawings | End Finish: Plain • Beveled • Deburred
EN 10217-7 tubes are designed for pressure service, making them suitable for steam, gas, and pressurized fluid systems.
Austenitic grades:
Ferritic grades:
Typical Service Range: Temperature: –50°C to +400°C (grade dependent) | Pressure: As per EN design codes & wall thickness selection.
| Service Environment | Austenitic Grades | Ferritic Grades |
|---|---|---|
| General industrial fluids | Excellent | Good |
| Steam & condensate | Excellent | Good |
| Chlorides | Good–Very good (316 best) | Very good (SCC resistant) |
| Oxidizing environments | Excellent | Excellent |
| Marine / coastal | 316 preferred | 444 suitable for mild exposure |
Selection Tip: Choose 316/316L for higher corrosion risk; Choose ferritic grades where SCC resistance & cost are key.
Manufacturing Welding Methods
Heat Treatment & Fabrication
INOX supplies tubes ready for pressure vessel & piping fabrication.
Mandatory Tests
Optional / Project Tests
Certification: EN 10204 3.1 (3.2 on request) | Third-party inspection available (TÜV / BV / DNV / LR)
| Property | Austenitic (304/316) | Ferritic (409/430/444) |
|---|---|---|
| Corrosion resistance | High | Medium–High |
| SCC resistance | Moderate | High |
| Cost | Higher | Lower |
| Thermal expansion | Higher | Lower |
| Pressure service | Excellent | Good |
| Grade Group | Indicative Price (INR/kg) | Indicative Price (USD/kg) |
|---|---|---|
| Austenitic 304/304L | ₹ 220 – 310 | $2.7 – 3.8 |
| Austenitic 316/316L | ₹ 340 – 480 | $4.1 – 5.8 |
| Stabilized (321/347) | ₹ 360 – 520 | $4.3 – 6.2 |
| Ferritic (409/430/444) | ₹ 160 – 260 | $2.0 – 3.1 |
(Pricing varies by OD, WT, finish, and testing scope.)
| Condition | Application |
|---|---|
| As-welded | Utility service |
| Pickled & passivated | Pressure & corrosion service |
| Polished OD | Skids / visible installations |
1. Pressure-Service Manufacturing Discipline
2. Austenitic + Ferritic Expertise Under One Roof
3. EPC & Project-Ready Supply
4. Lifecycle Cost Advantage
Optimized grade selection reduces over-specification, maintenance costs, and SCC-related failures while maintaining pressure safety compliance.
Power & Energy
Oil, Gas & Refineries
Chemical & Process Plants
HVAC & Utilities
Industrial Manufacturing
Standard Packaging
Export / Project Packaging
Documentation Included
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
steel@inoxsteelindia.in
+91 9930796690
Yes. It is specifically designed and tested for pressure service. Austenitic grades offer higher corrosion resistance; ferritic grades provide better SCC resistance and lower cost. Yes, especially in European EPC and EN-code-based projects. Yes—TÜV, BV, DNV, LR inspections available. Is EN 10217-7 suitable for pressure piping?
What is the difference between austenitic and ferritic grades?
Can EN 10217-7 replace ASTM pressure tubes?
Do you supply third-party inspected material?
INOX STEEL INDIA supplies EN 10217-7 austenitic and ferritic stainless steel welded tubes for pressure purposes. Available in grades 304, 316, 321, 347, 409, 430 and 444 with EN 10204 certification. Suitable for power plants, refineries, chemical and utility piping. Export ready.