## Concrete Pipe Flow Capacity Calculator

To create a table outlining the flow capacity of concrete pipes, several factors need to be considered, such as pipe diameter, flow velocity, and hydraulic conditions. Below is a summary table that includes key information related to concrete pipe flow capacity.

### Concrete Pipe Flow Capacity Table

Pipe Diameter (inches) | Flow Area (sq ft) | Flow Capacity (cubic feet per second) | Velocity (ft/s) | Manning’s n (roughness coefficient) |
---|---|---|---|---|

6 | 0.25 | 0.25 | 1.0 | 0.013 |

8 | 0.44 | 0.43 | 1.0 | 0.013 |

10 | 0.69 | 0.65 | 1.0 | 0.013 |

12 | 1.00 | 0.92 | 1.0 | 0.013 |

15 | 1.77 | 1.40 | 1.0 | 0.013 |

18 | 2.54 | 1.92 | 1.0 | 0.013 |

24 | 4.52 | 3.36 | 1.0 | 0.013 |

30 | 7.07 | 4.92 | 1.0 | 0.013 |

36 | 10.18 | 6.25 | 1.0 | 0.013 |

48 | 17.58 | 8.92 | 1.0 | 0.013 |

60 | 28.27 | 12.15 | 1.0 | 0.013 |

72 | 40.79 | 16.87 | 1.0 | 0.013 |

### Notes:

**Flow Area Calculation**: The flow area can be calculated using the formula:

Area=π4×(Diameter)2\text{Area} = \frac{\pi}{4} \times (\text{Diameter})^2Area=4π×(Diameter)2**Flow Capacity**: The flow capacity is given under specific conditions (Manning’s n = 0.013). The actual capacity may vary based on factors like slope, material condition, and specific use cases.**Velocity**: Flow velocity affects the overall flow capacity; typical velocities can range from 1.0 ft/s to 10 ft/s in various applications.**Manning’s n**: This value is a roughness coefficient that reflects the effect of pipe surface on flow resistance. Lower values indicate smoother surfaces.