EN10217-7 1.4404 Stainless Steel Welded Pipe for Waste Water Treatment Plant
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EN 10217-7 is a European standard that specifies the technical delivery conditions for welded stainless steel tubes intended for pressure purposes. This standard covers a range of steel grades, including 1.4401 and 1.4404, commonly known as 316 and 316L stainless steel.
Both 1.4401 and 1.4404 are austenitic stainless steels that offer excellent corrosion resistance and outstanding mechanical properties, making them ideal for applications where corrosion resistance is critical-such as in the chemical, petrochemical, and food processing industries.
GNEE supplies EN 10217-7 1.4401/1.4404 welded stainless steel tubes manufactured using various welding techniques, including TIG welding, plasma welding, and laser welding. These tubes are available in a wide range of sizes and wall thicknesses to meet different application requirements and are commonly used for transporting pressurized fluids.
In addition to meeting the technical delivery conditions of EN 10217-7, GNEE conducts comprehensive testing and inspection on all 1.4404 welded stainless steel tubes, including non-destructive testing (such as ultrasonic inspection) and visual examination, ensuring that every product meets the required quality and safety standards.
Specification:
| Material | TP316L; EN1.4404 |
| Standard | ASTM A312/ASTM A358; EN10217-7 |
| Type | ERW |
| Outer Diameter | 1/2'' to 24'' |
| Wall Thickness | SCH.10 to SCH.80 |
| Length | 6 meters or custom cut lengths |
| Delivery Condition | Solution Annealed & Pickled |
| Pipe End | Plain End, Beveled End |
| Testing | Product Analysis, Radiographic Test, Ultrasonic Test, Flattening Test, Hardness Test, Tensile Test etc. |
| Dimension | ANSI B36.10M; EN ISO 1127 |
| Package | Plywood case/Woven bag in bundle with pipe caps on both ends of the pipe |
Chemical Composition:
| Grade | UNS | C | Mn | P | S | Si | Cr | Ni | Mo | N |
| TP316L | S31603 | 0.03 max | 2.00 max | 0.045 max | 0.03 max | 0.75 max | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | 0.10 max |
| 1.4404 | / | 0.03 max | 2.00 max | 0.045 max | 0.015 max | 1.00 max | 16.5-18.5 | 10.0-13.0 | 2.00-2.50 | 0.11 max |
Mechanical Properties:
| Grade |
Tensile Strength min, MPa |
Yield Strength min, MPa |
Elongation, min (%) |
| TP316L | 485 | 170 | 35 |
| 1.4404 | 490-690 | 190 | 40 |
Why is 316L pipe widely used in wastewater treatment plants?
1. Corrosion Resistance: 316L offers excellent corrosion resistance, especially in the chloride-rich environment common in wastewater.
2. Durability: This material is strong and durable, capable of withstanding the mechanical stress and wear and tear experienced in wastewater systems.
3. Hygienic: Its surface is easy to clean and disinfect, preventing bacterial growth and ensuring hygienic conditions.
4. Long Service Life: The long service life of 316L reduces the need for frequent replacement, making it cost-effective in the long run.
5. Low Maintenance: Due to its rust- and fouling-resistant properties, maintenance requirements are minimal.
If you have a project need for 1.4404 stainless steel tubing, please feel free to place an order. GNEE maintains a large inventory of popular products for you to choose from. Available in both seamless and welded configurations, contact our factory for detailed chemical composition and free samples. We offer competitive pricing and excellent service.
Packaged in waterproof paper and steel strapping, these products meet standard export seaworthy packaging requirements and can be customized to suit various shipping methods.Email: info@gneestainless.com
