Full Bore vs Reduced Bore (Pigging)
If the line is piggable, bore must match the pig. Reduced-bore valves can stop a pigging program.
Side-by-side
| Topic | Full bore | Reduced bore |
|---|---|---|
| Pigging | Usually required | Often not piggable |
| Cv | Higher | Lower |
| Cost/weight | Higher | Lower |
| RFQ cue | Full bore / full port | Reduced bore / regular port |
| Common on | Pipeline ball / slab gate | Process on-off |
RFQ tip
Write full bore explicitly when the P&ID or pigging philosophy requires it.