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Manometric headHazen-Williams equation head lossFair-Whipple-Hsiao equation45° curveUniversal x Hazen-Williams relationshipPerda de carga em água pela fórmula universal (Darcy-Weisbach)

Calculate head

Calculate diameter

Calculate length

Calculate roughness

Calculate flow

Calculate the head loss in water flowing through pipes using the Darcy-Weisbach formula and the Churchill correlation for the friction factor calculation.

There are five calculation possibilities:

- Find the head loss
- Find the diameter
- Find the length
- Find the internal roughness of the pipe
- Find the flow

Surface | Absolute Roughness Coefficient $k$ (mm) |
---|---|

Drawn Copper, Lead, Brass, Aluminum (new) and the like | 0.001 - 0.002 |

PVC, PE and other smooth Plastic Pipes | 0.0015 - 0.007 |

Stainless steel, bead blasted | 0.001 - 0.006 |

Stainless steel, turned | 0.0004 - 0.006 |

Stainless steel, electron-polished | 0.0001 - 0.0008 |

Commercial steel or wrought iron | 0.045 - 0.09 |

Stretched steel | 0.015 |

Weld steel | 0.045 |

Galvanized steel | 0.15 |

Rusted steel (corrosion) | 0.15 - 4 |

New cast iron | 0.25 - 0.8 |

Worn cast iron | 0.8 - 1.5 |

Rusty cast iron | 1.5 - 2.5 |

Sheet or asphalted cast iron | 0.01 - 0.015 |

Smoothed cement | 0.3 |

Ordinary concrete | 0.3 - 1 |

Coarse concrete | 0.3 - 5 |

Wood stove | 0.18 - 0.9 |

Well planed wood | 0.18 - 0.9 |

Ordinary wood | 5 |

**Source**: Extracted from https://www.engineeringtoolbox.com/surface-roughness-ventilation-ducts-d_209.html. Last seen on 08/29/2023

Calculate the head loss in water flowing through pipes using the Darcy-Weisbach formula and the Churchill correlation for the friction factor calculation.

There are five calculation possibilities:

- Find the head loss
- Find the diameter
- Find the length
- Find the internal roughness of the pipe
- Find the flow

Surface | Absolute Roughness Coefficient $k$ (mm) |
---|---|

Drawn Copper, Lead, Brass, Aluminum (new) and the like | 0.001 - 0.002 |

PVC, PE and other smooth Plastic Pipes | 0.0015 - 0.007 |

Stainless steel, bead blasted | 0.001 - 0.006 |

Stainless steel, turned | 0.0004 - 0.006 |

Stainless steel, electron-polished | 0.0001 - 0.0008 |

Commercial steel or wrought iron | 0.045 - 0.09 |

Stretched steel | 0.015 |

Weld steel | 0.045 |

Galvanized steel | 0.15 |

Rusted steel (corrosion) | 0.15 - 4 |

New cast iron | 0.25 - 0.8 |

Worn cast iron | 0.8 - 1.5 |

Rusty cast iron | 1.5 - 2.5 |

Sheet or asphalted cast iron | 0.01 - 0.015 |

Smoothed cement | 0.3 |

Ordinary concrete | 0.3 - 1 |

Coarse concrete | 0.3 - 5 |

Wood stove | 0.18 - 0.9 |

Well planed wood | 0.18 - 0.9 |

Ordinary wood | 5 |

**Source**: Extracted from https://www.engineeringtoolbox.com/surface-roughness-ventilation-ducts-d_209.html. Last seen on 08/29/2023

- CHURCHILL, Stuart W. (1977). Friction-factor equation spans all fluid-flow regimes. Chemical engineering, Nov.