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' • TECHNICAL DATA PIPE <br /> ECONOMY <br /> SPECIAL THICKNESS CLASS <br /> SELECTION TABLE FOR DUCTILE IRON PIPE RELATED TO WORKING <br /> PRESSURE, LAYING CONDITIONS AND DEPTH OF COVER <br /> To find the thickness class required to meet a specific condition: <br /> 1. Select one of the five standard laying conditions shown on page 14. <br /> 2. From the tables below for your pipe size and laying condition selected in step 1, find the low- <br /> est thickness class that has a maximum depth of cover equal to or greater than required for <br /> your application. <br /> 3. Similarly find the lowest thickness class that has a rated working pressure equal to or greater <br /> than required for your application. <br /> 4. The larger of the two thickness classes determined in steps 3 and 4 is the thickness class that <br /> should be used for specifying and ordering ductile iron pipe for your application. <br /> ANSI NOMINAL RATED MAXIMUM DEPTH OF COVER IN FEETI <br /> PIPE WATER <br /> SIZE THICK. THICK. WORKING LAYING LAYING LAYING LAYING LAYING <br /> C ORKING <br /> LASS IN INCHES PRESSURE PSIt CONDITION CONDITION CONDITION CONDITION CONDITION <br /> TYPE 1 TYPE 2 TYPE 3 TYPE 4 TYPE 5 <br /> 3 51 .25 350 98 100* 100* 100* 100* <br /> 52 .28 350 100* 100* 100* 100* 100 <br /> 53 .31 350 100* 100* 100* 100* 100* <br /> 54 .34 350 100* 100* 100* 100* 100* <br /> 55 .37 350 100* 100* 100* 100* 100* <br /> 56 .40 350 100* 100* 100* 100* 100 <br /> 4 51 .26 350 76 86 96 100* 100* <br /> 52 .29 350 100* 100* 100* 100 100 * <br /> 53 .32 350 100* 100* 100* 100* 100* <br /> .35 350 100* 100* 100* 100* 100* <br /> 55 .38 350 100* 100* 100* 100* 100* <br /> 56 .41 350 100 100* 100* 100* 100* <br /> 6 50 .25 350 32 38 44 56 75 <br /> 51 .28 350 49 57 64 80 100* <br /> 52 .31! 350 67 77 86 100* 100* <br /> 53 .34 350 91 100* 100* 100* 100* <br /> 54 .37 350 100* 100* 100* 100* 100* <br /> 55 .40 350 100* 100* 100* 100* 100* <br /> 56 .43 350 100* 100* 100* 100* 100* <br /> 8 50 .27 350 25 30 36 46 64 <br /> 51 .30! 350 36 42 49 61 81 <br /> 52 .33 350 47 54 62 77 99 <br /> 53 .36 350 64 73 82 100* 100* <br /> 54 .39 350 80 91 100* 100* 100 <br /> 55 .42 350 98. 100* 100* 100* 100* <br /> 56 .45 350 100 100* 100* 100* 100* <br /> 10 50 .29 350 19 24 29 38 55 <br /> 51 .32 350 27 32 38 49 66 <br /> 52 .35 350 35 41 47 59 79 <br /> 53 .38 350 45 52 59 74 95 <br /> 54 .41 350 57 65 74 91 100* <br /> 55 .44 350 67 77 86 100* 100 <br /> 56 .47 350 81 92 100* 100* 100* <br /> 12 50 .31 350 17 22 27 36 52 <br /> 51 .34 350 23 28 33 43 60 <br /> 52 .37 350 30 35 41 53 71 <br /> 53 .40 350 36 42 49 61 81 <br /> 54 .43 350 45 52 59 74 95 <br /> 55 .46 350 54 62 71 87 100* <br /> 56 .49 350 64 73 83 100* 100* <br /> continued on next page <br /> 234 <br />