What is EN 10217-7 material?
EN 10217-7 is a European standard that specifies the manufacturing, testing, and performance requirements for welded stainless steel tubes intended for pressure applications. 1.4301 is the European material designation for austenitic stainless steel, equivalent to AISI 304, one of the most widely used stainless steels worldwide. This standard ensures that 1.4301 welded tubes meet stringent requirements for mechanical strength, corrosion resistance, and machinability, making them suitable for pressure applications in corrosive or hygienic environments.
EN 10217-7 TP304 pipes are made from hot-rolled or cold-rolled steel plate, sheet, or strip in surface conditions 1D, 2D, 2E, or 2B, and are manufactured using longitudinal or laser welding. GNEE offers descaled, heat-treated, and bright-annealed pipes in conditions such as W2(b), W2A(b), and W2R(b).We weld our pipes using an automated TIG welding process, eliminating internal and external weld seams for smooth internal and external surfaces and a perfect surface finish.
EN 10217-7 1.4301, 1.4307, 1.4404 Welded Tube Specifications
| Standard | EN 10217-7 |
|---|---|
| Tube Type | Welded Tube |
| Grades | 1.4301, 1.4307, 1.4404, 1.4541, 1.4571, 1.4462 |
| Finishing | As Welded, Annealing Pickling, Bright Annealing, Polished |
| Outside Diameter | 6 Up To 508 Mm |
| Thickness | 0.5 Up To 8 Mm |
EN 10217-7 Welded Stainless Steel Tube Specifications
| Grade | EN No. | Equivalent (AISI/ASTM) | Chemical Composition (max %, unless range given) | Mechanical Properties |
|---|---|---|---|---|
| 1.4301 | X5CrNi18-10 | 304 / TP304 | C ≤ 0.07, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.015, Cr 17.5–19.5, Ni 8.0–10.5 | Yield ≥ 190 MPa, Tensile 500–700 MPa, Elongation ≥ 40% |
| 1.4307 | X2CrNi18-9 | 304L / TP304L | C ≤ 0.030, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.015, Cr 17.5–19.5, Ni 8.0–10.5 | Yield ≥ 200 MPa, Tensile 500–700 MPa, Elongation ≥ 40% |
| 1.4404 | X2CrNiMo17-12-2 | 316L / TP316L | C ≤ 0.030, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.015, Cr 16.5–18.5, Ni 10.0–13.0, Mo 2.0–2.5 | Yield ≥ 220 MPa, Tensile 520–720 MPa, Elongation ≥ 40% |
Tolerances On Outside Diameter And Wall Thickness Of Tubes
| Outside Diameter D Mm | Tolerance On Outside Diameter D | Tolerance On Wall Thickness T | ||
|---|---|---|---|---|
| Tolerance Class | Permissible Deviation | Tolerance Class | Permissible Deviation | |
| D ≤ 168,3 | D3 | ± 0,75 % Or ± 0,3 Mm Whichever Is The Greater | T3 | ± 10 % Or ± 0,2 Mm Whichever Is The Greater |
| D4a | ± 0,5 % Or ± 0,1 Mm Whichever Is The Greater | |||
| D >168,3 | D2 | ± 1,0 % | ||
GNEE produces welded stainless steel pipes for pressure purposes, manufactured and designed in accordance with EN 10217 Part 7. The welded pipes are made of austenitic or austenitic-ferritic stainless steel, with stainless steel grades including 1.4301, 1.4307, 1.4404, 1.44.1, and 1.4571, suitable for various industries and usable not only at room temperature but also in low-temperature and high-temperature environments. Delivery conditions include W1R, W2Rb, W2Ab, and other surface treatments, with pipe inspection and testing conducted using Test Category 1 (TC1) or Test Category 2 (TC2).
