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DNmm DNin φmm SCH5S SCH10S SCH20S SCH40S Sch80s SCH20 SCH30 Sch40 Sch60 Sch80 Sch100 Sch120 Sch140 Sch160 XXS 10 3/8 17 1.2 1.6 2 2.5 3.2 2.5 3.5 15 1/2 22 1.6 2 2.5 3 4 3 4 5 7.5 20 3/4 27 1.6 2 2.5 3 4 3 4 5.5 8 25 1 34 1.6 2.8 3 3.5 4.5 3.5 4.5 6.5 9 32 1 1/4 42 1.6 2.8 3 3.5 5 3.5 5 6.5 10 40 1 1/2 48 1.6 2.8 3 4 5 4 5 7 10 50 2 60 1.6 2.8 3.5 4 5.5 3.5 4 5 5.5 7 8.5 11 65 2 1/2 76 2 3 3.5