We are a professional manufacturer and supplier of EN 10253-4 Elbows, offering both seamless and welded butt-weld elbows made from austenitic and duplex stainless steels. Our elbows are designed and produced in accordance with EN 10253-4 Type A and Type B requirements for pressure applications, ensuring excellent corrosion resistance, strength, and dimensional accuracy.
What is EN 10253-4 Elbow?
EN 10253-4 specifies the technical requirements for stainless steel butt-weld fittings used in pressure pipelines, including elbows, tees, reducers, and caps.
An EN 10253-4 elbow is a curved pipe fitting that changes the direction of flow in a pipeline. These elbows are available in:
- 45° and 90° standard angles
- Long radius (LR) R-3D and short radius (SR) R-2D types
- Seamless or welded construction
They are widely used in oil and gas, petrochemical, power generation, food processing, and marine industries.
Available Types
| Type | Description | Typical Use |
|---|---|---|
| Type A | Standard elbows, no strict wall thickness requirement | General industrial piping |
| Type B | Wall thickness matched to connecting pipes | Pressure and high-temperature service |
Material Grades (Commonly Used)
| Material No. | Steel Grade | Equivalent ASTM / UNS | Type |
|---|---|---|---|
| 1.4301 | X5CrNi18-10 | AISI 304 / UNS S30400 | Austenitic |
| 1.4307 | X2CrNi18-9 | AISI 304L / UNS S30403 | Austenitic |
| 1.4404 | X2CrNiMo17-12-2 | AISI 316L / UNS S31603 | Austenitic |
| 1.4541 | X6CrNiTi18-10 | AISI 321 | Austenitic (stabilized) |
| 1.4571 | X6CrNiMoTi17-12-2 | AISI 316Ti | Austenitic (stabilized) |
| 1.4462 | X2CrNiMoN22-5-3 | Duplex UNS S31803 / S32205 | Duplex |
| 1.4410 | X2CrNiMoN25-7-4 | Super Duplex UNS S32750 | Super Duplex |
Heat Treatment of EN 10253-4 Elbow
- Austenitic stainless steel: solution annealed at 1050–1150°C followed by water quenching.
- Duplex stainless steel: solution annealed at 1020–1100°C, then rapidly cooled.
Testing and Certification
Each EN 10253-4 elbow is supplied with:
- Dimensional and visual inspection
- Hydrostatic or pneumatic testing
- Non-Destructive Testing (RT / UT / PT)
- Chemical and mechanical tests
- EN 10204 3.1 or 3.2 inspection certificate
Below is structural dimensions for elbows with bending radius 2D, 3D and 5D listed
| DN | Dmm | 2D | 3D | 5D | ||||
| Fmm | Cmm | Bmm | Fmm | Cmm | Bmm | Fmm | ||
| 15 | 21,3 | 25 | 50 | 36 | 28 | 56 | 38 | 45 |
| 20 | 26,9 | 25 | 50 | 39 | 29 | 58 | 43 | 57 |
| 25 | 33,7 | 28 | 56 | 42 | 38 | 76 | 55 | 72 |
| 32 | 42,4 | 32 | 64 | 53 | 48 | 96 | 69 | 93 |
| 40 | 48,3 | 38 | 76 | 62 | 57 | 114 | 81 | 108 |
| 50 | 60,3 | 51 | 102 | 81 | 76 | 152 | 106 | 135 |
| 65 | 76,1 | 63 | 127 | 102 | 95 | 190 | 133 | 175 |
| 80 | 88,9 | 76 | 152 | 121 | 114 | 228 | 159 | 205 |
| 100 | 114,3 | 102 | 203 | 159 | 152 | 304 | 209 | 270 |
| 125 | 139,7 | 127 | 254 | 197 | 190 | 380 | 260 | 330 |
| 150 | 168,3 | 152 | 305 | 237 | 229 | 458 | 313 | 390 |
| 200 | 219,1 | 203 | 406 | 313 | 305 | 610 | 414 | 510 |
| 250 | 273,0 | 254 | 508 | 391 | 381 | 762 | 518 | 650 |
| 300 | 323,9 | 305 | 610 | 467 | 457 | 914 | 619 | 775 |
| 350 | 355,6 | 356 | 711 | 533 | 533 | 1066 | 711 | 850 |
| 400 | 406,4 | 406 | 813 | 610 | 610 | 1220 | 813 | 970 |
| 450 | 457,0 | 457 | 914 | 686 | 686 | 1372 | 914 | 1122 |
| 500 | 508,0 | 508 | 1016 | 762 | 762 | 1524 | 1016 | 1245 |
| 600 | 610,0 | 610 | 1220 | 914 | 914 | 1828 | 1219 | 1524 |
| 700 | 711,0 | 711 | 1422 | 1066 | 1067 | 2134 | 1422 | 1778 |
| 800 | 813,0 | 813 | 1626 | 1220 | 1219 | 2438 | 1625 | 2033 |
| 900 | 914,0 | 914 | 1828 | 1371 | 1372 | 2744 | 1829 | 2285 |
| 1000 | 1016,0 | 1016 | 2032 | 1524 | 1524 | 3048 | 2032 | 2540 |
Download EN10253-4 Elbow dimension
Example EN 10253-4 Elbow Order Information
Product: EN 10253-4 Elbow
Type: Type A, 90° Long Radius
Material: 1.4404 (X2CrNiMo17-12-2) – AISI 316L
Size: DN100, SCH40
Manufacture: Seamless
Inspection: EN 10204 3.1
Quantity: 60 pieces
Related Products
- EN 10253-4 Tee
- EN 10253-4 Reducer
- EN 10253-4 Cap
- EN 10253-2 Butt-Weld Fittings
- EN 1092-1 Flanges
