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EN 10217-7

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.

Table of Contents

What Are EN 10217-7 Welded Tubes?

They are factory-welded stainless steel tubes manufactured with controlled welding, heat treatment, and testing to meet pressure-service requirements defined by European norms.

  • Pressure suitability (unlike decorative standards)
  • Consistent mechanical properties
  • Controlled weld quality
  • Corrosion resistance by grade selection
  • Availability in industrial sizes and thicknesses

Austenitic vs Ferritic Stainless Steel — Clear Engineering Difference

Austenitic Stainless Steel (1.4301 / 1.4404 etc.)

Typical Grades: 304/304L, 316/316L, 321, 347

  • Excellent general corrosion resistance
  • High ductility and toughness
  • Good performance at elevated temperatures
  • Easy fabrication and welding

Used in: Process piping, heat exchangers, steam lines, chemical plants, refineries

Ferritic Stainless Steel (1.4512 / 1.4016 / 1.4521)

Typical Grades: 409, 430, 444

  • Lower cost vs austenitic grades
  • Good resistance to oxidation
  • Excellent resistance to chloride stress corrosion cracking
  • Stable thermal conductivity

Used in: Power plant components, exhaust systems, heat recovery units, utility piping

Why EN 10217-7 Instead of Decorative or Non-Pressure Tubes?

  • Pressure Compliance: Defined mechanical strength and pressure testing requirements
  • Material Traceability: EN steel number system (1.4301, 1.4404, etc.)
  • Weld Integrity: Weld bead controlled or removed, post-weld heat treatment as required

EN 10217-7 vs ASTM Standards (Quick Clarity)

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

Key Industries Using EN 10217-7 Tubes

  • Power & Energy – Steam & condensate lines, heat recovery systems
  • Oil, Gas & Refineries – Process piping, utility systems
  • Chemical & Process Plants – Pressure fluid handling, heat transfer systems
  • HVAC & Utilities – Chilled water, hot water & steam networks
  • Industrial Manufacturing – Pressure equipment, skids & modules

Why Engineers Specify EN 10217-7 Tubes

  • Pressure-rated safety
  • Broad grade selection (cost vs performance)
  • Compatibility with European EPC norms
  • Long service life in industrial environments
  • Reliable alternative to ASTM pressure tubes

INOX STEEL INDIA Advantage

  • Austenitic & ferritic grades under one roof
  • Pressure-service welding discipline
  • Pickled & passivated supply
  • EN 10204 certification
  • Export & EPC-ready documentation

A. Size Range, OD / WT Chart & Dimension Capability

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

B. Pressure & Temperature Performance

Temperature Range: –50°C to +400°C (grade dependent)
Pressure: As per EN design codes and wall thickness selection

C. Corrosion Resistance Matrix

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

D. Welding, Fabrication & Heat Treatment

  • TIG / Plasma / Laser / HF welding
  • Weld bead removed or bead rolled
  • Full penetration welds for pressure integrity
  • Austenitic: Solution annealed
  • Ferritic: Annealed to restore ductility

E. Testing & Inspection (EN 10217-7 Compliance)

  • Eddy Current / Hydrostatic testing
  • Dimensional inspection
  • Visual inspection
  • Optional: UT / RT (welds), PMI, Mechanical & impact tests

Certification: EN 10204 3.1 (3.2 on request)

G. Price Range (Indicative)

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

H. Surface Condition & Finish

Condition Application
As-welded Utility service
Pickled & passivated Pressure & corrosion service
Polished OD Skids / visible installations

Packaging & Export Handling

  • Plastic end caps
  • Bundle strapping
  • Moisture-resistant wrapping
  • VCI protection
  • Heat-treated wooden crates

Get EN 10217-7 Pressure-Grade Stainless Steel Tubes

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.

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