Steam Pipe Sizing Calculator
Size steam supply and condensate return piping based on load requirements.
Steam Pipe Capacities
| Size | 2 psig | 15 psig | 100 psig |
|---|---|---|---|
| 1" | 48 lb/hr | 85 lb/hr | 220 lb/hr |
| 1-1/2" | 115 lb/hr | 200 lb/hr | 530 lb/hr |
| 2" | 205 lb/hr | 360 lb/hr | 940 lb/hr |
| 3" | 530 lb/hr | 920 lb/hr | 2400 lb/hr |
| 4" | 1000 lb/hr | 1750 lb/hr | 4600 lb/hr |
Based on 0.5 psi/100ft pressure drop
Design Guidelines
Max Velocity: 4,000-6,000 ft/min supply
Condensate: 2,000-3,000 ft/min wet return
Slope: 1" per 20 ft min for condensate
Trap Sizing: 2-3x condensate load