Hydronic Pipe Capacity: steel_sch40
Hydronic system pipe capacity data — maximum recommended flow rate (GPM), velocity, friction loss, and inside diameter for closed-loop HVAC hydronic systems by pipe material and nominal size
| pipe material | nominal size in | friction loss ft per 100ft (ft/100ft) | inside diameter in (in) | max recommended gpm (gpm) | notes | pipe roughness ft (ft) | velocity at max gpm fps (fps) |
|---|---|---|---|---|---|---|---|
| steel_sch40 | 0.5 | 16.8 | 0.622 | 2 | Schedule 40 black steel; threaded connections below 2.5-in; C=120 Hazen-Williams | 0.00015 | 6.6 |
| steel_sch40 | 0.75 | 17.9 | 0.824 | 4 | 3/4-in sch40 steel; terminal piping | 0.00015 | 9.5 |
| steel_sch40 | 1 | 12.8 | 1.049 | 8 | 1-in sch40 steel | 0.00015 | 9.4 |
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