Welding Neck Flange
Welding Neck flange
Welding neck flanges according to EN1092-1 Type 11 (DIN 2627 – 2638) are often used in installations, piping systems, appendages or in equipment construction. Nijhuis & Wigger can supply suitable welding neck flanges for every quality, pipe size and pressure class.
- Available pressure classes PN 6 – PN 400
- Thicker schedule sizes than EN-standard available, like STD/XS according ASME
- Dimensions up to DN 3600
- Different sealing surfaces available like Nut (Form D), Feder (Form C) or according specification
We deliver welding neck flanges in the following material grades:
| DIN standard | EN standard |
| Carbon steel | |
| C22.8 | P250GH |
| Rst 37.2 | S235JRG2 |
| 15Mo3 | 16Mo3 |
| 13CrMo44 | 13CrMo4-5 |
| W/TSTE 355 | P355QH1 |
| P355NL1 | |
| P355NH | |
| 10CrMo9-10 | 11CrMo9-10 |
| Stainless steel | |
| 1.4301 / 1.4307 / 1.4541 | |
| 1.1104 / 1.4404 / 1.4571 | |
| 1.4462 (Duplex) | |
| 1.4501 (Superduplex) |
According to the standard DIN/EN1092-1 welding neck flanges are separated in:
| DIN standard | EN standard | Type | Pressure |
| 2631 | EN 1092-1 | 11 | PN 6 |
| 2632 | EN 1092-1 | 11 | PN 10 |
| 2633 | EN 1092-1 | 11 | PN 16 |
| 2634 | EN 1092-1 | 11 | PN 25 |
| 2635 | EN 1092-1 | 11 | PN 40 |
| 2636 | EN 1092-1 | 11 | PN 63 |
| 2637 | EN 1092-1 | 11 | PN 100 |
| 2638 | EN 1092-1 | 11 | PN 160 |
| 2628 | EN 1092-1 | 11 | PN 250 |
| 2629 | EN 1092-1 | 11 | PN 320 |
| 2627 | EN 1092-1 | 11 | PN 400 |
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