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Zap. Nazivni premer d × s (mm) Svetla površina Razmerje Vrednost
št. Pe cevi(“) cevi (cm2) presekov povračila v SIT
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1. DN 20 (3/4”) 25 × 2,3 3,268 1.000 100.000
2. DN 25 (1”) 32 × 3,0 5,309 1,624 110.000
3. DN 32 (5/4”) 40 × 3,7 8,346 2,553 255.300
4. DN 40 (6/4”) 50 × 4,6 13,074 4,000 400.000
5. DN 50 (2”) 63 × 5,8 20,749 6,349 634.900
6. DN 65 (2 1/2”) 75 × 6,9 29,416 9,001 900.100
7. DN 80 (3”) 90 × 8,2 42,544 13,018 1,301.800
8. DN 100 (4”) 110 × 10,0 63,617 19,466 1,946.600
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