Hydraulic Institute Engineering Data Book May 2026

The Hydraulic Institute Engineering Data Book is a foundational reference for fluid flow, pipe friction, and pumping system design. The most current physical version is the Second Edition, though much of its content has been transitioned into a dynamic online library. Where to Obtain the Book

• Pump performance curves and affinity laws
• Friction loss tables for pipes, valves, and fittings
• Physical properties of thousands of fluids (water, oils, slurries, chemicals)
• Suction specific speed, NPSH (Net Positive Suction Head), and cavitation prevention
• Viscosity correction factors
• Material selection guides for corrosive and abrasive services

• Vapor pressure curves for thousands of fluids.
• Atmospheric pressure correction charts for high-altitude installations.
• Safety margins for NPSH available (NPSHa) versus NPSH required (NPSHr).

Not a Standards Document, But a Computational Foundation

It is critical to distinguish this book from HI Standards. Standards tell you how to test a pump or what tolerances are acceptable. The Engineering Data Book tells you what fluid you are moving, how friction will affect your pipeline, and what the net positive suction head (NPSH) available truly is. hydraulic institute engineering data book