Duplex vs Super Duplex Valves
Chloride and seawater RFQs must name the correct duplex grade — PREN and project specs drive the choice.
Side-by-side
| Topic | Duplex (e.g. 2205) | Super duplex (e.g. 2507) |
|---|---|---|
| PREN | Lower than super duplex | Higher chloride resistance |
| Cost | Lower | Higher |
| Typical use | Many process chloride duties | Severe seawater / high chloride |
| RFQ cue | UNS S31803/S32205 | UNS S32750/S32760 |
| Welding | WPS critical | WPS critical |
RFQ tip
Paste the material class / UNS number from the datasheet on every line.