EN 1092-1 Type 11 · PN 2.5
EN 1092-1 welding neck flange (EN 1092-1/11) used on the flanged connections of pipelines in PN 2.5. Supplied in carbon steel, stainless and alloy grades, from stock or project-specific.
| Product type | Welding Neck Flange (EN 1092-1/11) |
|---|---|
| Standard | EN 1092-1 Type 11 |
| Pressure class | PN 2.5 |
| Size range | DN10 – DN2000 |
| Material | ASTM A105, A350 LF2, A182 F304/F304L, F316/F316L, F11, F22 |
| Facing | RF / FF / RTJ |
| Certification | EN 10204 3.1 / 3.2 |
Selection and ordering notes
The EN 1092-1 type 11 weld neck flange is the metric counterpart of the ASME weld neck design. The hub provides a smooth stress transition and the type is used safely in higher PN classes.
EN flanges have a different bolt circle from ASME types, so the mating flange must share the same standard. Low classes such as PN 2.5 and PN 6 are used in ventilation, low pressure water and utility lines. See flange types guide for the details.
