TABLE OF CONTENTS Because the sizing of pumps is determined principally by pump flow and head, this comprehensive chapter on pipe friction is included in this book. A poor computation of system friction will have a disastrous effect on pump selection and operation. There isn't a more critical issue facing water system designers than the development of better procedures for calculating pump head for these systems.
The designer of water systems should not be without copies of the Hydraulic Institute's Engineering Data Book, 2nd ed., and the latest issue of Cameron Hydraulic Data published by Ingersoll-Dresser Pumps, Flowserve Corporation. These two documents have contributed greatly to the complex subject of pipe friction.
As pointed out in the introduction to this book, pipe friction analysis is, at best, an inexact science. Much needs to be done to obtain better information on pipe and fitting friction. The increasing cost of energy that may confront owners and operators of these water systems will provide the driving force to achieve better piping friction data and better piping design. Technical societies are now studying current data on pipe fitting losses to insure that this data is reasonable.
This chapter is based on water and sewage which are considered to be Newtonian liquids. Such liquids do not have a change of viscosity caused by any motion of the liquid when the temperature of the liquid is constant. Non-Newtonian liquids are sludges that will be discussed in Chap. 20.
Good piping design always balances
