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# Steam Pipes - Max. Flow and Pressure Drop

## Pressure drop and maximum allowable flow in steam pipes.

Steam Pipes - Max. Flow and Pressure Drop
MainsLaterals
Pressure(psi)
600 175 30 600 175 30
Pressure Drop
(psi per 100 ft pipe)
0.7 0.5 0.3 1 0.7 0.5
Nominal Pipe Size
(in)
Maximum Flow (103 lb/h)
3 6.2 2.7 0.9 7.5 3.6 1.2
4 12 5.7 2.5 15 7.5 3.2
6 33 16 6.6 40 21 8.5
8 63 32 14 76 42 18
10 108 58 25 130 76 32
12 158 87 39 190 115 50
14 217 117 54 260 155 70
16 300 166 78 360 220 100
18 227 101 300 130
20 132 170
• 1 psi (lb/in2) = 6,894.8 Pa (N/m2)
• 1 ft (foot) = 0.3048 m

## Related Topics

• ### Steam and Condensate

Design of steam & condensate systems with properties, capacities, sizing of pipe lines, system configuration and more.

## Related Documents

• ### Recommended Velocities in Steam Systems

The steam velocity in a steam distribution system should be within certain limits to avoid excessive wear and tear
• ### Sizing Steam Pipes (kg/h)

Steam is a compressible gas where pipe line mass flow capacity depends on steam pressure.
• ### Sizing Steam Pipes (lb/h)

Steam is a compressible gas where the capacity of a pipe line depends on the size of the pipe and the steam pressure.
• ### Steam Pipes - Online Pressure drop Calculator

Calculate pressure drops in steam distribution pipe lines.
• ### Steam Pipes - Pressure Drop vs. Steam Flow

Steam pipes and pressure drop diagrams - imperial and metric units.

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## Citation

• The Engineering ToolBox (2014). Steam Pipes - Max. Flow and Pressure Drop. [online] Available at: https://www.engineeringtoolbox.com/steam-pipes-maximum-allowable-flow-pressure-drop-d_1883.html [Accessed Day Month Year].

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6.3.17

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