Hydraulic Institute Engineering Data Book -

Based on HI’s own standards (ANSI/HI 14.6), the Data Book outlines:

The Data Book provides the definitive exposition of the Affinity Laws, which govern the relationship between speed, impeller diameter, flow, head, and power.

These laws allow engineers to predict the performance of a pump if the motor speed is changed (e.g., using a Variable Frequency Drive) or if the impeller is trimmed. hydraulic institute engineering data book

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The Hydraulic Institute (HI) Engineering Data Book is a comprehensive technical reference for the pump industry, offering essential data on fluid characteristics, pipe friction loss, and calculations. The content, originally published in1979 and updated in 1990, has been modernized into the free, interactive HI Data Tool which includes calculators for piping and system performance. Access the digital resource directly at Pumps.org. Engineering Data Library - Pumps.org

Title: The Hydraulic Institute Engineering Data Book: A Comprehensive Review of Standards, Methodology, and Application in Fluid Mechanics Based on HI’s own standards (ANSI/HI 14

Abstract The Hydraulic Institute Engineering Data Book serves as the definitive reference for the pump industry in North America and globally. Published by the Hydraulic Institute (HI), this compendium provides the empirical data, mathematical formulas, and standard practices necessary for the design, selection, and application of rotodynamic pumps. This paper explores the scope of the Data Book, analyzing its critical sections including pump selection theory, affinity laws, viscosity corrections, and system head curves. Furthermore, it discusses the transition from purely empirical nomographs to modern digital integration, highlighting the text’s enduring relevance in ensuring hydraulic efficiency and reliability.

Open any university fluid mechanics textbook (e.g., Fox, Munson, or Cengel). You will find the Darcy-Weisbach equation, Moody charts, and basic water properties. So, why spend money on the HI Data Book? These laws allow engineers to predict the performance

Ask any veteran user, and they’ll whisper about the Appendix on Pump Piping Strain and Nozzle Loads. It’s not glamorous, but improper piping support is a top-5 cause of premature bearing and seal failure. The Data Book contains alignment tolerances and force limits that — if followed — would save industry millions per year in unscheduled downtime. Yet most young engineers skip it. The wise ones don’t.