C403-78: AWWA Standard Practice for the Selection of Asbestos-Cement Transmission and Feeder Main Pipe, Sizes 18 In. Through 42 In. (PDF)

This standard has been prepared so that design engineers may quickly determine the correct strength classification of asbestos-cement transmission pipe to use under various combinations of internal pressure (static, operating and surge) and external load (earth and superimposed live loads). Combined loading curves depicting the relationship between hydrostatic loading and the external loading capabilities are included to expedite selection of the correct pipe strength classification. The pipe strength classifications of 30, 35, 40, 45, 50, 60, 70, 80, and 90 refer to similarly numbered classifications found in AWWA C402. Detailed coverage of installation of asbestos-cement pipe can be found in AWWA C603. Included are sections on the following: general information, general design including strength and design factors, combined loading theory, three edged bearing load; external loads, earth loads and superimposed loads; hydrostatic pressure, operating pressure and surge pressure; pipe selection, combined loading curves, safety factors, use of selection charts for economical surge pressure analysis, frictional power requirements and a friction loss head chart.