Welding neck flanges according to UNI standards are used in combination with a collar welded to the pipe. The collar flange can rotate freely, facilitating bolt hole alignment and is particularly suitable for systems requiring frequent disassembly or the use of expensive materials.
| Material | Carbon steel Rst37.2 |
|---|---|
| Standard | UNI |
| PN | 10 |
| Type | Welding Neck EN |