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EN 10217-7 Welded Stainless Steel Tubes for Pressure Purposes TC1/TC2 for Corrosion Resisting Service
| MOQ: | 5Ton |
| Price: | Based on grade, size, surface, processing, quantity and current raw material market price. |
| Standard Packaging: | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Delivery Period: | 7-15 |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
| Supply Capacity: | Stock supply, regular production and custom manufacturing available. |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies EN 10217-7 welded stainless steel tubes for global EPC contractors, pressure vessel manufacturers, and industrial end-users requiring reliable welded tubing for pressure and corrosion resisting service at room, low, or elevated temperatures. Produced to EN 10217-7, this European standard covers welded tubes of circular cross-section made of austenitic and austenitic-ferritic (duplex) stainless steel.
EN 10217-7 is the European specification for welded stainless steel tubes for pressure equipment, compliant with the Pressure Equipment Directive (PED) 2014/68/EU. The standard defines two test categories: Test Category 1 (TC1) and Test Category 2 (TC2), which determine the level of inspection and testing required. Tubes are manufactured from flat-rolled stock by an automatic welding process and are available in various delivery conditions including as-welded, annealed, and pickled. The standard references DIN EN ISO 1127 for dimensional tolerances, with tolerance classes D3, D4, and T3 commonly specified.
| Dimension | Specification |
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Product Name
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EN 10217-7 Welded Stainless Steel Tube |
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Product Alias
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Pressure Tube / Welded Stainless Tube / EN 10217 Tube / PED Tube / 1.4404 Tube / 1.4571 Tube |
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Material Type
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Austenitic or Austenitic-Ferritic (Duplex) Stainless Steel |
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Key Feature
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PED compliant; pressure and corrosion resisting; TC1/TC2 inspection categories; OD 5-205mm |
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Common Grades
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1.4301 (304), 1.4307 (304L), 1.4404 (316L), 1.4571 (316Ti), 1.4462 (Duplex 2205) |
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Chemical Composition (1.4404)
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Cr 16.5-18.5% / Ni 10.0-13.0% / Mo 2.0-2.5% / C ≤ 0.030% / Fe Balance |
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Mechanical Properties (1.4404)
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Tensile ≥500-700 MPa / Yield ≥200 MPa / Elongation ≥35% |
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Manufacturing Process
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Flat-Rolled Stock → Forming → Automatic Welding → Heat Treatment (optional) → Sizing → Testing |
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Delivery Conditions
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Welded (W0) / Annealed + Pickled (W2R) / Bright Annealed (W2Rb) |
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Primary Applications
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Pressure Vessels / Boilers / Heat Exchangers / Chemical Processing / Oil & Gas / Power Generation |
| Parameter | Available Options |
|---|---|
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Product Standard
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EN 10217-7:2021 (current), EN 10217-7:2014 (superseded) |
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Grade Equivalents
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1.4301 (X5CrNi18-10 / AISI 304), 1.4307 (X2CrNi18-9 / 304L), 1.4404 (X2CrNiMo17-12-2 / 316L), 1.4571 (X6CrNiMoTi17-12-2 / 316Ti), 1.4462 (X2CrNiMoN22-5-3 / 2205) |
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Outside Diameter (OD)
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5 mm to 205 mm |
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Wall Thickness (WT)
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0.1 mm to 4 mm |
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Length
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Cut-to-length per order (e.g., 6m standard) |
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Test Categories
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TC1 (standard inspection) / TC2 (enhanced inspection) |
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Delivery Conditions
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W0 (welded), W0b (welded + bright), W2R (annealed + pickled), W2Rb (annealed + bright) |
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Tolerance Class
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OD: D3 (±0.75%) / D4 (±0.5%); WT: T3 (±10%) per EN ISO 1127 |
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Inspection
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Tensile Test / Flattening Test / Hydrostatic Test / Eddy Current Test / Weld Bend Test / Intergranular Corrosion Test / PMI |
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Documents
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MTC 3.1 (TC1) / MTC 3.2 (TC2, with third-party witness) |
EN 10217-7 welded tubes are specified for pressure equipment and corrosion resisting applications across multiple industries. The PED compliance makes this standard mandatory for pressure equipment placed on the European market.
Typical applications include:
- Pressure vessels and boilers
- Heat exchangers and condensers
- Chemical and petrochemical process piping
- Oil and gas production and refining equipment
- Power generation plants
- Pulp and paper processing
- Food and beverage processing (EN 10357 variant)
- Pharmaceutical applications (DIN 11866 variant)
- Water treatment and drinking water (EN 10312 variant)
Key selection considerations: Select Test Category 1 (TC1) for standard applications with routine inspection documentation (MTC 3.1). Test Category 2 (TC2) requires more extensive testing and MTC 3.2 with third-party inspection, suitable for higher-risk pressure equipment. Choose 1.4301/1.4307 for general corrosive service; 1.4404 when molybdenum is needed for pitting resistance; 1.4571 when titanium stabilization is required for weld corrosion resistance in the 425-800°C range; 1.4462 duplex grade when higher strength and stress corrosion cracking resistance are required. The tolerance class (D3/T3 or D4/T3) affects dimensional precision and cost.
Shangyou Stainless Steel provides value-added processing including custom cutting, beveling, and end protection.
All tubes are packed with export-standard protection including protective end caps, steel strapping, waterproof wrapping, and wooden pallets or steel frames.
Quality documents include MTC 3.1, inspection reports, packing list, and heat number traceability. Third-party inspection (TUV, SGS, BV) can be arranged upon request.
1. What is EN 10217-7?
EN 10217-7 is the European standard for welded stainless steel tubes for pressure purposes, specifying technical delivery conditions for austenitic and duplex stainless steel tubes.
2. What sizes does EN 10217-7 cover?
Outside diameter 5 mm to 205 mm, wall thickness 0.1 mm to 4 mm.
3. What are the test categories?
TC1 (standard inspection with MTC 3.1) and TC2 (enhanced inspection with MTC 3.2 and third-party witness).
4. What grades are available?
1.4301 (304), 1.4307 (304L), 1.4404 (316L), 1.4571 (316Ti), and duplex grades like 1.4462 (2205).
5. What is the difference between EN 10217-7 and ASTM A312?
EN 10217-7 is the European standard under the PED framework; ASTM A312 is the US standard. Both cover welded stainless tubes but apply to different regulatory systems.
6. Is heat treatment required for EN 10217-7 tubes?
Not mandatory. Tubes can be delivered as-welded (W0) or annealed/pickled (W2R/W2Rb).
7. What is the difference between 1.4404 and 1.4571?
1.4404 is molybdenum-alloyed low-carbon (316L); 1.4571 has titanium stabilization (316Ti) and is used when sensitization risk exists in welded construction.
8. What tolerance classes apply?
OD tolerance D3 (±0.75%) or D4 (±0.5%); WT tolerance T3 (±10%) per EN ISO 1127.
9. What documents are provided with delivery?
MTC 3.1 for TC1; MTC 3.2 for TC2, with inspection reports, packing list, and heat number traceability.
10. What are typical applications for EN 10217-7 tubes?
Pressure vessels, boilers, heat exchangers, chemical processing, oil & gas, power generation, and food/pharmaceutical processing.
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Need EN 10217-7 welded stainless steel tubes for pressure equipment, heat exchangers, or chemical processing? Send requirements including grade, OD/WT/length, test category (TC1/TC2), delivery condition, quantity, and intended service conditions.
Shangyou Stainless Steel provides custom sizes, processing, and export solutions for global B2B customers.
