en 10217-7 stainless steel tube
2. Standard: EN 10217-7, the premier European specification for welded stainless steel tubes for pressure services
3. Process: 100% automated continuous longitudinal welding utilizing advanced plate forming with zero filler metal options
4. Size Range: Metric outside diameters and wall thicknesses precisely calibrated to EN ISO 1127 tolerance codes
5. Heat Treatment: Full furnace post-weld solution annealing to eliminate microstructural residual stresses and hardenings
6. Surface Finish: Clean uniform pickled matte (W1/W2 class), descaled matte, or passivated clean industrial finish
7. Application: Industrial fluid transit networks, major chemical piping loops, cooling towers, and boiler connections
8. Service Advantage: Fully compliant with European PED (Pressure Equipment Directive) criteria, quick shipping dispatch
9. Packaging: Secure sea-freight packing with heavy plastic end-caps, bundled or loaded with high-strength lifting slings
10. Key Advantage: Delivers exceptional volumetric fluid transmission capacity paired with robust seam ductility and great lifecycle economy
EN 10217-7 Stainless Steel Tube – European Standard Welded Pressure Piping Solutions for Industrial Process Systems
HEBEI ALL TRUST STEEL CO., LTD specializes in manufacturing premium en 10217-7 stainless steel tube designed for demanding pressure applications. Our European-standard welded tubes are reliable in chemical processing, pharmaceutical manufacturing, and industrial fluid systems. They can make more than 15,000 tons of tubes every year and pass all hydraulic tests. Each item goes through a strict solution annealing process and a full eddy current inspection. This makes sure that there are no flaws in the weld seams and that they fully comply with PED 2014/68/EU for your important pressure equipment installations.
Why Choose Our European Standard Welded Pressure Tubes
Our product uses advanced automated longitudinal welding technology and precise heat treatment protocols after the weld. Program-controlled solution annealing ovens are used in the production process to get rid of any remaining stresses and make the metal more resistant to rust.
The uniformity of the dimensions in your project is very good. We follow the strict EN ISO 1127 tolerance codes for all sizes, ranging from 6.0 mm to 1219.2 mm in outer diameter. Through cold-forming testing, the accuracy of the wall thickness is up to ±0.05 mm.
Each tube receives mandatory non-destructive testing verification. Our quality system implements 100% automated eddy current scanning combined with hydrostatic pressure leak testing at elevated test pressures. This dual-verification approach guarantees absolute structural integrity for your pressure-sensitive installations.
Technical Specifications of en 10217-7 stainless steel tube
| Parameter | Details |
|---|---|
| Standard | EN 10217-7 / ASTM A312 / ASTM A358 / ASTM A249 |
| Material Grades | 1.4301 / 1.4307 / 1.4401 / 1.4404 / 1.4541 / 1.4571 |
| Manufacturing Process | Automatic Longitudinal Welding / TIG / Laser / Plasma Welding |
| Outer Diameter (OD) | 6.0 mm – 1219.2 mm |
| Wall Thickness (WT) | 0.5 mm – 30.0 mm |
| Length Options | 5.8 m / 6.0 m / 11.8 m / 12.0 m / Custom Lengths |
| Surface Finish | Solution Annealed & Pickled (W2A) / Bright Annealed (W2B) / Polished |
| End Configuration | Plain End (PE) / Beveled End (BE) / Square Cut |
| NDT Methods | Eddy Current Testing / Hydrostatic Pressure Testing / Radiographic Testing |
| Quality Certificates | EN 10204 3.1 & 3.2 MTC / ISO 9001:2015 / PED Compliance |
| Test Categories | TC1 (Standard) / TC2 (Enhanced Inspection) |
Material Grade Selection Guide
Austenitic Series
1.4301 (304) – Your economical choice for general chemical processing with excellent formability and moderate corrosion resistance. Ideal for ambient-temperature fluid systems.
1.4307 (304L) – Low-carbon variant offering enhanced weld zone corrosion resistance. Perfect when you need to avoid sensitization during fabrication.
1.4401 (316) – Molybdenum-enhanced grade providing superior resistance to chlorides and industrial acids. Recommended for coastal installations and marine environments.
1.4404 (316L) – The most specified grade for pharmaceutical and food processing. Combines weldability with exceptional pitting resistance in chloride-rich solutions.
Stabilized Grades
1.4541 (321) – Titanium-stabilized for high-temperature service up to 900°C. Your solution for thermal cycling applications and expansion joints.
1.4571 (316Ti) – Combines molybdenum corrosion protection with titanium stabilization. Engineered for demanding chemical process environments with temperature fluctuations.
Manufacturing Excellence Behind Every Tube
In our factory, we use fully automated continuous welding lines that let us see the seams as they're being made. The longitudinal weld gets precise control over the heat input, which keeps the bead shape at its best without going too deep.
Solution annealing between 1020°C and 1120°C is a required part of post-weld processing. Right after, rapid water quenching happens, which breaks down carbides and restores the highest level of corrosion resistance throughout the hot area.
Surface finishing options accommodate your specific requirements. Standard pickled finish (W2A) provides clean matte appearance suitable for industrial piping. Bright annealed finish (W2B) delivers enhanced aesthetic appeal for visible installations. Mechanical polishing achieves Grit 240/320 smoothness for hygienic processing applications.
Comprehensive Quality Verification System
Non-Destructive Testing Protocol
Every meter of en 10217-7 stainless steel tube passes through automated inspection stations. Eddy current probes scan the entire weld seam, detecting surface and sub-surface discontinuities down to 0.3 mm depth.
Hydrostatic pressure testing applies test pressures calculated per EN 13480 formulas. Your tubes withstand minimum 1.5x design pressure for 10 seconds without leakage or permanent deformation.
For TC2 applications, we conduct additional ultrasonic testing and radiographic examination, ensuring your critical pressure vessels meet enhanced safety requirements.
Mechanical Testing Program
Transverse weld tensile testing verifies that weld strength matches base material properties. Typical results show 98-102% weld efficiency.
Flattening tests confirm ductility without cracking. Ring expansion tests validate circumferential uniformity. Intergranular corrosion testing per EN ISO 3651-2 ensures weld zone resistance.
Chemical analysis via optical emission spectrometry confirms alloy composition within specification limits. PMI (Positive Material Identification) verification accompanies every shipment batch.
Application Solutions Across Industrial Sectors
Chemical Processing Infrastructure
Your methods for handling acidic media need reliable control. Our tubes can handle being exposed to sulfuric acid, phosphoric acid, and organic chemicals. Stress corrosion cracking can't happen in salt settings because the grain has been fully softened.
Production of Pharmaceuticals
For process pipes to be clean, the inside must be completely smooth. We offer bead-rolled join patterns with Ra values less than 0.8 μm. The inside of your Clean-in-Place (CIP) systems is smooth and free of cracks, which keeps bacteria from growing.
Production of Food and Drink
Materials that are FDA-compliant are needed in places that process dairy, brew beer, and make juice. The construction with Grade 1.4404 ensures neutral taste and can withstand multiple thermal sanitization cycles.
Power Generation Systems
Condenser tubing and heat exchanger bundles operate under continuous thermal stress. Our solution-annealed tubes maintain mechanical properties through decades of thermal cycling.
Water Treatment Facilities
Desalination plants and wastewater treatment systems expose piping to aggressive chloride concentrations. Molybdenum-bearing grades provide proven resistance to pitting and crevice corrosion.
Customization Capabilities for Your Project
Dimensional Flexibility
Fixed-length cutting accommodates your installation drawings with ±3 mm precision. Double random lengths optimize material utilization for fabrication shops. Custom OD and WT combinations support specialized pressure ratings.
End Preparation Options
Plain square-cut ends suit mechanical coupling systems. Beveled ends (30° or 37.5° angles) prepare tubes for immediate butt-welding. Roll-grooved ends enable rapid field assembly with grooved couplings.
Surface Treatment Enhancements
Passivation treatment enhances natural oxide layer formation. Electropolishing achieves ultra-smooth Ra 0.4 μm finishes for semiconductor applications. Color PVD coating provides visual identification for multi-circuit systems.
Certification & Compliance Documentation
Your shipment arrives with complete traceability documentation. EN 10204 3.1 Mill Test Certificates provide heat-specific chemical analysis and mechanical test results. Each certificate displays full PED compliance verification.
Third-party inspection services are readily accommodated. SGS, TUV, BV, DNV, and ABS inspectors witness production and testing at our facility. Inspection reports accompany your commercial documentation.
Material traceability extends from raw coil identification through final product marking. Laser-etched marking displays grade designation, heat number, standard reference, and manufacturer identification per your specifications.
Packaging & Global Logistics Solutions
Export-Grade Protection
Heavy-duty plastic end caps seal tube openings against moisture ingress. Individual protective sleeves prevent surface scratching during handling. Hexagonal bundles with steel strapping maintain geometric stability.
Fumigation-free wooden crates accommodate irregular lengths. Waterproof wrapping provides additional moisture barriers for ocean freight. Container optimization reduces your per-meter shipping costs.
Flexible Shipping Arrangements
We plan trips that leave from ports in Shanghai, Ningbo, Tianjin, Qingdao, and Shenzhen. You can choose from FOB, CFR, CIF, and DDP terms, depending on how you want to buy.
When you put tubes, fittings, flanges, and valves into mixed containers, you make your transportation simpler. When shipments are combined, overall freight costs go down while delivery times stay the same.
FAQ
Q：What defines the foundational pressure containment capability of this standard product product line?
A：This pipe utilizes high-specification European standard austenitic formulations joined via advanced automated longitudinal fusion technology, providing exceptional diameter consistency, absolute wall thickness uniformity, and robust mechanical containment limits.
Q：What advanced heat treatment processes secure the microstructural uniformity of this pressure tube batch?
A：Every production batch undergoes precision program-controlled solution heat treatments followed by rapid uniform water-quenching lines, ensuring all alloy elements are dissolved uniformly into a fully stable crystalline matrix.
Q：What precise inspection procedures verify the structural consistency and safety lines of this welded batch?
A：The completed tube body undergoes 100% mandatory non-destructive validation, passing through continuous automated internal eddy current scanning lines combined with high-pressure hydrostatic leakage verification to ensure zero wall flaws.
Q：Can this standard welded series be customized with specialized end configurations for swift field connection?
A：Yes, we provide precision square-cut plain ends with complete burr-free facing, customized beveling configurations tailored to match automated welding setups, and roll-grooved end preparations for mechanical couplings.
Q：What tracking and certification records accompany my shipment of this en 10217-7 welded product?
A：All shipments include a transparent Mill Test Certificate (MTC) conforming strictly to EN 10204 3.1 criteria, capturing precise ladle chemical heat analysis, mechanical values, and full PED compliance logs.
Contact Us
Contact our technical team at info@hballtrust.com for material selection guidance, pressure rating calculations, and project-specific quotations. We're ready to support your engineering success with the en 10217-7 stainless steel tube.
