Hydraulic - Institute Pipe Friction Manual Pdf

Introduction

• $h_f$ = Head loss due to friction (feet or meters)
• $f$ = Friction factor (dimensionless)
• $L$ = Length of pipe (feet or meters)
• $D$ = Inside diameter of pipe (feet or meters)
• $v$ = Velocity of fluid (ft/s or m/s)
• $g$ = Gravitational constant

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To understand the value of the manual, one must first understand the physics it elucidates. When a fluid flows through a pipe, it encounters resistance from the inner walls of the pipe and from the internal friction of the fluid molecules rubbing against one another. This resistance converts useful kinetic and potential energy into heat, resulting in a pressure drop known as "head loss." Introduction