EN 10216-5 Seamless Stainless Steel Pressure Tube in Coil
Product Overview
The EN 10216-5 Seamless Stainless Steel Pressure Tube in Coil is a premium-grade tubular product engineered to meet the stringent requirements of the European standard EN 10216-5 for non-alloy, alloy, and stainless steel tubes intended for pressure applications. Manufactured by Wenzhou Jixing Metal Materials Co., Ltd., this coil-wound seamless tubing is specifically designed for high-integrity pressure systems where continuous, joint-free material performance is critical. The product is fully compliant with the European Pressure Equipment Directive (PED) 2014/68/EU, making it suitable for regulated industrial applications across Europe and international markets requiring CE marking.
Delivered in coil form, this seamless tubing offers superior coilability, ease of fabrication, and reduced material waste during forming and bending operations. The seamless construction ensures uniform microstructure and eliminates the weld seam weakness inherent in welded alternatives, providing exceptional resistance to internal pressure, thermal cycling, and mechanical fatigue.
Material & Properties
EN 10216-5 covers a comprehensive range of stainless steel grades suitable for pressure applications. The following grades are typically available for this coil tube product:
- 1.4301 (304) — General-purpose austenitic stainless steel with excellent corrosion resistance and formability
- 1.4307 (304L) — Low-carbon variant optimized for welding and resistance to intergranular corrosion
- 1.4401 (316) — Molybdenum-enhanced grade offering superior resistance to pitting and crevice corrosion
- 1.4404 (316L) — Low-carbon 316 variant for demanding corrosion environments and welded assemblies
- 1.4571 (310S) — High-temperature austenitic grade for thermal stability up to 1150°C
- 1.4539 (321) — Titanium-stabilized grade with excellent resistance to sensitization at elevated temperatures
- 1.4577 (904L) — High-alloy grade for aggressive chemical environments
Key mechanical and physical properties conforming to EN 10216-5 include:
- Yield strength (Rp0.2): ≥ 205 MPa (annealed condition, grade-dependent)
- Tensile strength (Rm): 500–700 MPa depending on grade and wall thickness
- Elongation (A5): ≥ 40% (minimum, as per standard)
- Hardness: ≤ 230 HB (annealed condition)
- Operating temperature range: -196°C to +600°C (grade-dependent)
Specifications
| Parameter | Specification |
|---|---|
| Governing Standard | EN 10216-5:2014 |
| Product Form | Seamless Tube in Coil (Coil Tube) |
| Outer Diameter (OD) | 6.0 mm – 102.0 mm |
| Wall Thickness | 0.5 mm – 6.0 mm |
| Coil Length | Customized (typically 100 m – 500 m per coil) |
| Surface Finish | Pickled & Passivated (P&P), 2B, No. 4, or Custom |
| Tolerance on OD | ± 0.1 mm to ± 0.5 mm (per EN 10216-5) |
| Tolerance on Wall Thickness | ± 10% (standard) or ± 5% (close tolerance available) |
| PED Conformity | Category II, III, IV (as applicable per EN 13445 / EN 12161) |
| Testing Categories | TC1 (Routine Testing) / TC2 (Enhanced Testing) |
| Heat Treatment | Solution Annealed (Annealed & Pickled) |
| Ends | Plain, Beveled, or Perforated (as required) |
| Packaging | Wooden coil stand with moisture-proof wrapping |
Manufacturing Process
The production of EN 10216-5 seamless stainless steel coil tube follows a rigorous multi-stage process to ensure dimensional accuracy, metallurgical integrity, and PED compliance:
- Raw Material Selection: Virgin stainless steel billets or ingots are sourced from certified mills with full chemical composition traceability (EN 10204 Type 3.1 material certificates).
- Hot Rolling / Forging: Billets are heated to forging temperature and pierced to produce seamless hollow blanks, ensuring a continuous, weld-free tubular structure.
- Cold Drawing / Cold Rolling: The hot-rolled tube is cold-worked to achieve precise dimensional tolerances, improved mechanical properties, and enhanced surface finish.
- Solution Annealing: Tubes are heated to 1050–1150°C and rapidly quenched to dissolve carbides, restore full austenitic structure, and achieve maximum corrosion resistance and ductility.
- Pickling & Passivation: Acid cleaning removes oxide scale and forms a protective chromium oxide passive layer on the surface.
- Coiling: The finished tube is wound into coils of specified length and diameter using precision coiling equipment to prevent deformation or surface damage.
- Non-Destructive Testing (NDT): Each coil undergoes electromagnetic testing (ET) or ultrasonic testing (UT) for wall thickness measurement and internal/external defect detection.
- Hydrostatic / Pneumatic Pressure Testing: All coils are pressure-tested to verify weld integrity (for any end fittings) and resistance to internal pressure per EN 10216-5 requirements.
- Final Inspection & Certification: Dimensional verification, surface inspection, and compilation of EN 10204 3.1 certificates with full test data.
Applications
EN 10216-5 seamless stainless steel coil tube is widely employed in high-pressure and high-purity applications across multiple industries:
- Pressure Vessel Fabrication: Construction of boilers, heat exchangers, reactors, and pressure vessels per EN 13445 and EN 12161 standards.
- Oil & Gas Industry: Downstream processing equipment, separators, and piping systems handling corrosive hydrocarbons.
- Pharmaceutical & Biotech: Hygienic process tubing for CIP/CIP systems, fermenters, and clean-in-place applications requiring high surface quality.
- Food & Beverage Processing: Sanitary-grade tubing for dairy, brewing, and food processing equipment.
- Chemical Processing: Reactors, condensers, and transfer lines exposed to aggressive chemical media.
- Power Generation: Superheater tubes, economizers, and feedwater systems in thermal power plants.
- Marine & Offshore: Ballast systems, seawater cooling circuits, and subsea equipment.
- Automotive & Aerospace: Fuel lines, hydraulic systems, and high-temperature exhaust components.
Quality Certifications & Compliance
Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management system ensuring full regulatory compliance for this product line:
- EN 10204 Type 3.1 Material Test Certificate: Full chemical analysis, mechanical test data, and dimensional verification for every production lot.
- PED (2014/68/EU) Conformity: Product designed, manufactured, and tested to meet the European Pressure Equipment Directive, enabling CE marking for pressure equipment categories II–IV.
- TC1 / TC2 Testing Category Classification:
- TC1 (Routine Testing): Standard NDT (ET/UT), hydrostatic testing, and visual inspection — suitable for Category II equipment.
- TC2 (Enhanced Testing): Full NDT suite including ET, UT, and radiographic testing (RT) where applicable, plus additional mechanical testing — required for Category III/IV PED applications.
- ISO 9001:2015: Certified quality management system ensuring consistent product quality and process control.
- EN 10204 3.1 Certificate: Third-party verified test documentation traceable to original mill test reports.
- Material Traceability: Full heat-number traceability from raw steel ingot through all manufacturing stages to final coil delivery.
Key Selling Points
- Full PED Compliance: Ready for CE marking in pressure equipment applications across the European Economic Area without additional testing.
- TC1/TC2 Flexibility: Available in both routine and enhanced testing categories to match the exact PED category of the end application.
- Seamless Construction: No weld seam to compromise pressure integrity — superior fatigue life and corrosion resistance.
- Coil Form Advantage: Eliminates jointed connections in long runs, reduces fabrication time, minimizes material waste, and enables complex forming operations.
- Wide Grade Range: Multiple stainless steel grades available to address diverse corrosion, temperature, and mechanical requirements.
- Full Traceability: Complete EN 10204 3.1 documentation with heat-number tracking for regulatory and quality assurance purposes.
- Custom Specifications: Tailored dimensions, surface finishes, and coil configurations to meet specific project requirements.
Ordering Information
When specifying this product, customers should provide the following details to ensure correct supply:
- Stainless steel grade (e.g., 1.4301, 1.4404, 1.4571)
- Outer diameter and wall thickness (OD × WT)
- Required coil length or weight per coil
- Surface finish requirement (P&P, 2B, No. 4, etc.)
- PED category and testing level (TC1 or TC2)
- End treatment (plain, beveled, perforated)
- Applicable end-use standard (EN 13445, EN 12161, ASME, etc.)
Wenzhou Jixing Metal Materials Co., Ltd. is committed to delivering EN 10216-5 seamless stainless steel coil tube that meets the highest standards of quality, safety, and regulatory compliance for global pressure equipment applications.