Cargo Tank Venting - Velocity Check
Check cargo-tank venting outlet velocity - SOLAS II-2 Reg. 11.6 requires ≥ 30 m/s from P/V outlet to disperse vapour.
Outlet velocity
26.5m/s
Compliance
Increase outlet height or reduce diameter
Formula, assumptions, and limits
30 m/s ensures vapour jet rises clear of ship boundary layer. Applies to continuous venting (loading). P/V alarm valve set to typically 14 kPa positive, 3.5 kPa negative.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Venting flow rate | m³/s | loading rate | |
| Outlet cross-section | m² | venting design |