WITHDRAWN--C403-05: AWWA Standard for the Selection of Asbestos-Cement Transmission Pipe, Sizes 18 In. Through 42 In. (450 mm Through 1,050 mm), for Water Supply Service (PDF)
SKU: STC_0060957-PDF
This standard has been prepared so that design engineers may determine the correct pressure 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 external loading capabilities are included to expedite the selection of the correct pipe strength classification. This standard also presents criteria for determining the type of pipe to be used under various soil and water conditions. Information to assist the engineer in selecting the most economical size of pipe is in the appendices. Appendix A contains a friction loss of head chart based on the Hazen and Williams formula. Appendix B is a detailed analysis of surge pressure factors. Appendix C includes tables to assist the engineer in determining the yearly power costs to overcome loss of head caused by friction. The appendices are for information only and are not a part of ANSI/AWWA C403.
Description
Major changes made to the standard include the following: information on determining the type of pipe to be used under various soil and water conditions has been moved from Sec. II of the Foreword to the body of the standard (Sec. 4.8), and the Scope of the standard has been updated to reflect this change (Sec. 1.1); and, Class C bedding with shaped bottom and Class D bedding have been removed, so as to show only the recommended bedding conditions (Sec. 4.4.1 and Figure 1).