PN DN
材料 Kg/cm2 10 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600
≤16 2.5 3 3 3 3 3.5 3.5 4 4 4 4 4.6 5 6 7 7 8 8 8 9
20# 25 2.5 3 3 3 3 3.5 3.5 4 4 4 4 4.6 5 6 7 7 8 8 9 10
12CrMo 40 2.5 3 3 3 3 3.5 3.5 4 4 4.5 5 5.5 7 8 9 10 11 12 13 15
15CrMo 64 3 3 3.5 3.5 3.5 3.5 4 4.5 5 6 7 8 9 11 12 14 16 18 19 22
12CrMoV 100 3 3.5 4 4 4.5 4.5 5 6 7 8 9 10 13 15 18 20
160 4 4.5 5 5 6 6