Hazen-Williams equation: head loss (ft per 100 ft) for water in pipe.
Hydraulic engineering calculator and reference for pipe head loss, flow rate, velocity, Reynolds number, pump selection and pipe sizing.
Read our guidesMaster essential hydraulic calculations for pipe flow, pressure drop, pump sizing, and system design with practical formulas, tools, and real-world examples.
Read more →A detailed comparison of the Hazen-Williams and Darcy-Weisbach equations for calculating friction loss in pipe flow, including accuracy, applicability, and practical recommendations for engineers.
Read more →Learn the recommended velocity limits for water and other fluids in piping systems. This article covers industry standards, general guidelines, and the effects of high and low velocities including erosion, water hammer, and sedimentation.
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Read more →Learn how to determine the economic pipe diameter that minimizes total lifecycle costs by balancing initial capital expenditure against ongoing pumping energy and maintenance expenses.
Read more →Learn how to apply density/area curves from NFPA 13 to design fire sprinkler systems. This article explains the selection of design area, density, hose streams, and hydraulic calculations with practical examples.
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