en 10216-5 1.4404 seamless tube
2. Standard: EN 10216-5, European specification governing seamless stainless steel tubes for rigorous pressure services
3. Process: 100% solid-billet hot extrusion and precision cold reduction, ensuring a completely weld-free structure
4. Size Range: Metric outside diameters and wall thicknesses precisely calibrated to EN ISO 1127 tolerance codes
5. Heat Treatment: Full furnace solution tempering to completely remove mechanical stresses and stabilize alloy balance
6. Surface Finish: Clean solution annealed and pickled (D2/T2 class), descaled matte, or bright annealed (BA) mirror look
7. Application: Coastal desalination plants, marine offshore platforms, pharmaceutical clean utilities, and heavy chemical reactors
8. Service Advantage: Support 100% non-destructive testing (NDT), full compliance with European PED (Pressure Equipment Directive) criteria
9. Packaging: Hexagonal ocean bundles bound tightly with high-tensile steel straps and thick protective pipe-end closures
10. Key Advantage: Seamless piece architecture entirely eliminates directional leak paths while providing supreme defense against chloride pitting
EN 10216-5 1.4404 Seamless Tube - Premium European Pressure Piping Solutions for Marine and Chemical Industries
Hebei All Trust Steel Co., Ltd specializes in manufacturing high-performance en 10216-5 1.4404 seamless tube with an annual production capacity exceeding 15,000 tons. This extra-low carbon molybdenum-alloyed pressure tube conforms strictly to European EN 10216-5 technical delivery conditions. Our 1.4404 grade (X2CrNiMo17-12-2 / 316L equivalent) features a carbon content ≤ 0.030%, molybdenum content ranging 2.0-2.5%, and chromium at 16.5-18.5%. Every tube undergoes 100% hydrostatic testing and eddy current inspection. We have approximately 5000 tons of rolling inventory in outer diameters from 6.0 mm to 406.4 mm and wall thicknesses from 0.5 mm to 35.0 mm and provide comprehensive EN 10204 3.1/3.2 Mill Test Certificates with full heat number traceability.
What Makes EN 10216-5 1.4404 Seamless Tube Essential for Pressure Applications
This tool helps you overcome key obstacles in handling volatile fluids. Its no-weld design removes the problems of the longitudinal seam seen in welded counterparts. The ultra-low carbon chemistry inhibits intergranular corrosion during heat cycling.
This grade has a Pitting Resistance Equivalent Number (PREN) greater than 24. This grade has excellent resistance to chloride-induced pitting in coastal desalination facilities and offshore platforms. Adding molybdenum to improve resistance to crevice corrosion in stagnant media zones.
Hydrogen purged brilliant annealed finish is good for your pharmaceutical clean utilities. It produces an ultra-smooth inner surface that reduces bacterial adhesion and fluid friction. This tube has an austenitic structure, hence it is resistant to high temperatures (up to 450 °C), so it is used in heavy chemical reactors.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | EN 10216-5 / ASTM A312 / ASTM A269 / ASTM A213 |
| Material Grade | 1.4404 (X2CrNiMo17-12-2 / 316L) |
| Manufacturing Process | Hot Pierced & Extruded / Cold Drawn / Solution Heat Treated |
| Outer Diameter (OD) | 6.0 mm – 406.4 mm |
| Wall Thickness (WT) | 0.5 mm – 35.0 mm |
| Length | 5.8 m / 6.0 m / 11.8 m / 12.0 m / Custom Cut |
| Surface Finish | Solution Annealed & Pickled (D2/T2) / Bright Annealed (BA) |
| End Type | Plain End (PE) / Beveled End (BE) / Square Cut |
| Tensile Strength (Rm) | 490 – 690 MPa |
| Yield Strength (Rp0.2) | ≥ 190 MPa |
| Elongation | ≥ 40% |
| Carbon Content | ≤ 0.030% |
| Chromium Content | 16.5 – 18.5% |
| Nickel Content | 10 – 13% |
| Molybdenum Content | 2.0 – 2.5% |
| Non-Destructive Testing | 100% Eddy Current / Ultrasonic (UT) / Hydrostatic Pressure |
| Quality Certificates | EN 10204 3.1 & 3.2 MTC / PED 2014/68/EU / ISO 9001:2015 |
| Third-Party Inspection | SGS / BV / TUV / DNV / ABS Accepted |
Why Choose Our EN 10216-5 1.4404 Seamless Tube
Superior Material Chemistry
Our product integrates an advanced extra-low carbon molybdenum formula. This chemistry delivers elite defense against localized pitting and severe chloride corrosion cell attacks. You maintain complete chemical inertness in volatile marine installations.
The restricted carbon level (max 0.03%) prevents carbide precipitation during welding thermal cycles. Your weld zones remain immune to sensitization-related failures. The 2.0-2.5% molybdenum content specifically targets chloride ion resistance in seawater applications.
Precision Manufacturing Process
We fabricate tubes through advanced multi-pass precision drawing operations. Each piece undergoes atmospheric solution annealing at controlled temperatures to dissolve alloy elements uniformly. This thermal treatment completely removes mechanical stresses and stabilizes the alloy microstructure.
Cold reduction processes achieve dimensional tolerances per EN ISO 1127 D4/T4 classes. You receive tubes with outside diameter precision of ±0.05 mm. Wall thickness uniformity ensures predictable pressure ratings across the entire length.
Our 100% eddy current testing detects surface and subsurface discontinuities down to 0.5 mm depth. Ultrasonic inspection verifies internal soundness. Every batch completes mandatory Positive Material Identification (PMI) alloy validation alongside spectrographic plate analysis.
Comprehensive Testing Protocol
Quality control includes mandatory intergranular corrosion testing per EN ISO 3651-2. This destructive test confirms the low-carbon matrix remains resistant to grain boundary attack. Flattening tests verify material ductility for cold bending operations.
Drift expanding tests ensure the tube can accommodate field assembly tolerances without cracking. Tensile testing validates mechanical properties against standard requirements. Hardness measurements confirm proper heat treatment cycles.
You receive full documentation including tensile test reports, chemical composition certificates, and non-destructive testing records. Third-party inspection from SGS, TUV, or BV is welcomed at any production stage.
Applications Across Critical Industries
Marine and Offshore Systems
Coastal desalination plants utilize these tubes for high-salinity brine handling loops. The molybdenum content prevents pitting in concentrated chloride environments. Offshore platforms rely on this grade for hydraulic control lines and firewater deluge systems.
Shipboard piping systems benefit from the seamless construction's vibration resistance. Naval vessels specify this material for critical seawater cooling circuits and ballast systems.
Pharmaceutical and Biotechnology
High-purity water loops demand the bright annealed finish we provide. The mirror-smooth interior surface prevents bacterial colonization and facilitates clean-in-place (CIP) procedures. Process equipment interconnections maintain sterile transfer conditions.
Your active pharmaceutical ingredient (API) manufacturing requires tubes that won't leach metallic ions. Our extra-low carbon chemistry ensures chemical neutrality with sensitive compounds.
Chemical Processing Plants
Heavy chemical reactors handling corrosive acids and alkalis depend on this tube's structural integrity. The austenitic matrix maintains ductility across wide temperature ranges. Solvent recovery columns and distillation units utilize this material for reboiler circuits.
Chlor-alkali plants specify en 10216-5 1.4404 seamless tube for chlorine gas handling systems. The seamless construction eliminates leak paths in toxic service applications.
Customization Capabilities
Dimensional Flexibility
We support micro-diameter calibrations down to 6.0 mm OD for instrumentation tubing. Large-bore options extend to 406.4 mm for main process headers. Custom cut lengths accommodate your specific installation requirements without field cutting.
Wall thickness selections range from 0.5 mm thin-wall configurations to 35.0 mm heavy-wall pressure containment. You specify the exact dimensions matching your design pressure calculations.
End Preparation Options
Precision square-cut plain ends arrive completely burr-free for automated orbital welding. Beveled end configurations match your welding procedures, with angles from 30° to 37.5° and root face dimensions per your specification.
Threaded ends with NPT or BSPT profiles eliminate field threading operations. Flanged rim adaptations facilitate bolted connections in modular systems.
Surface Finishing Solutions
Solution annealed and pickled (D2/T2 class) finish provides a clean descaled matte surface for general industrial use. Bright annealed (BA) finish delivers a mirror-like appearance with superior cleanliness for sanitary applications.
Pharmaceutical grade surfaces are achieved by mechanical polishing to Ra < 0.4 µm. Electropolishing further lowers surface roughness and improves development of the passivation layer.
Quality Assurance and Certification
With each purchase we provide mill test certificates for chemical and mechanical qualities EN 10204 3.1 Type 3.2 certifications provide independent inspection verification when required. Our ISO 9001:2015 accreditation is proof of our methodical management of quality.
By complying with PED 2014/68/EU you guarantee that your pressure equipment fulfils the European essential safety criteria. The CE marking shows that the processes for the conformity evaluation have been carried out. Material traceability is done from raw material heat numbers to final product marking.
We have established connections with more than 15 ISO certified steel mills for continuous material quality and supply dependability. Backup sourcing options avoid manufacturing delays during high demand times.
Packaging & Global Logistics
Individual tubes are supplied in protective plastic bag sleeves to prevent moisture entry and contamination of the surface. Hexagon bundles are fastened in geometric position by high-tensile steel straps for transit. Threads and bevels protected by thick pipe-end caps
Fumigation free plywood boxes are ISPM 15 international phytosanitary standard compliant. Ocean freight uses waterproof wrapping sacks as a second barrier against moisture. “Bundle weights are optimal for container loading and crane handling capacity.
We ship from the ports of Shanghai, Ningbo, Tianjin, Qingdao, Shenzhen. Your logistical preference is FOB, CFR, CIF and DDP terms. Consolidated shipments may be made via mixed loading of pipes with fittings, flanges and valves.
FAQ
Q: What is the difference between 1.4401 and 1.4404 tubes?
A : Product has reduced carbon (0.03% max versus 0.07% in 1.4401). The additional low carbon concentration makes 1.4404 better for welding applications by reducing sensitisation. Without post weld heat treatment your weld heat affected zones are resistant to intergranular corrosion.
Q：Can this tube handle high-pressure hydrogen service?
A：Yes, the austenitic structure of 1.4404 provides good resistance to hydrogen embrittlement. We control surface finish and inclusion levels strictly to prevent hydrogen-induced cracking initiation sites. Proper material selection based on your operating pressure and temperature conditions ensures safe hydrogen transport.
Q：What dimensional tolerances apply to EN 10216-5 tubes?
A：Standard tolerances follow EN ISO 1127 classification. D4/T4 precision classes provide tighter control for critical applications. Outside diameter tolerance reaches ±0.05 mm, while wall thickness maintains ±10% accuracy. You specify the tolerance class matching your assembly requirements.
Q：Does EN 10216-5 require impact testing?
A：Standard delivery includes room temperature mechanical testing. For cryogenic applications or specific design codes, we perform Charpy V-notch impact tests at -196°C or -46°C. These tests verify low-temperature toughness for LNG service or Arctic installations.
Q：How do I verify the authenticity of delivered tubes?
A：Check the permanent tube marking including manufacturer logo, standard designation "EN 10216-5", grade "1.4404", heat number, and technical class "TC1" or "TC2". Cross-reference these markings with the EN 10204 3.1 certificate. PMI testing on-site confirms alloy composition matches documentation.
Contact Us
Ready to secure reliable pressure piping for your critical application with the en 10216-5 1.4404 seamless tube? Contact our technical team at info@hballtrust.com for quotations, material certifications, and engineering support tailored to your project specifications.
