Hydraulic Institute Engineering Data Book [portable] Jun 2026

, serves as a primary, industry-standard reference for pump and system design. It covers critical, standardized data on fluid properties, piping friction, and NPSH calculations to ensure consistent engineering practices. Learn more about these resources on the official Hydraulic Institute website Engineering Data Book - 2nd Edition - Pumps.org

| Pipe Material | Assumed C-value (Hazen-Williams) | HI Data Book’s “After 5 Years” C-value | Efficiency loss | |---------------|----------------------------------|----------------------------------------|------------------| | Steel (new) | 140 | 110–120 | 8–12% | | HDPE | 150 | 145 (stable) | <2% | | Aged cast iron| 100 | 65–80 | >25% | hydraulic institute engineering data book

Charts to determine if flow is laminar, transitional, or turbulent. , serves as a primary, industry-standard reference for