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Pipe Wall Thickness Standards (mm)

1 CARBON, ALLOY AND STAINLESS STEEL
2 Nominal Pipe Size Outside Diameter Nominal Wall Thickness Nominal Pipe Size
3 ANSI JIS Sch 5S Sch 10S Sch 10 Sch 20 Sch 30 Sch 40S STD Sch 40 Sch 60 Sch 80S XS Sch 80 Sch 100 Sch 120 Sch 140 Sch 160 XXS
4 ½ 21.3 21.7 1.7 2.1 - - - 2.8 2.8 2.8 - 3.7 3.7 3.7 - - - 4.8 7.5 ½
5 ¾ 26.7 27.2 1.7 2.1 - - - 2.9 2.9 2.9 - 3.9 3.9 3.9 - - - 5.6 7.8 ¾
6 1 *33.5 34.0 1.7 2.8 - - - 3.4 3.4 3.4 - 4.5 4.5 4.5 - - - 6.4 9.1 1
7 1¼ 42.2 42.7 1.7 2.8 - - - 3.6 3.6 3.6 - 4.9 4.9 4.9 - - - 6.4 9.7 1¼
8 1½ 48.3 48.6 1.7 2.8 - - - 3.7 3.7 3.7 - 5.1 5.1 5.1 - - - 7.1 10.2 1½
9 2 *60.5 60.5 1.7 2.8 - - - 3.9 3.9 3.9 - 5.5 5.5 5.5 - - - 8.7 11.1 2
10 2½ *73.2 76.3 2.1 3.0 - - - 5.2 5.2 5.2 - 7.0 7.0 7.0 - - - 9.5 14.0 2½
11 3 88.9 89.1 2.1 3.0 - - - 5.5 5.5 5.5 - 7.6 7.6 7.6 - - - 11.1 15.2 3
12 3½ 101.6 101.6 2.1 3.0 - - - 5.7 5.7 5.7 - 8.1 8.1 8.1 - - - - - 3½
13 4 114.3 114.3 2.1 3.0 - - - 6.0 6.0 6.0 - 8.6 8.6 8.6 - 11.1 - 13.5 17.1 4
14 5 *141.2 139.8 2.8 3.4 - - - 6.6 6.6 6.6 - 9.5 9.5 9.5 - 12.7 - 15.9 19.0 5
15 6 *168.1 165.2 2.8 3.4 - - - 7.1 7.1 7.1 - 11.0 11.0 11.0 - 14.3 - 18.3 21.9 6
16 8 *218.9 216.3 2.8 3.8 - 6.4 7.0 8.2 8.2 8.2 10.3 12.7 12.7 12.7 15.1 18.3 20.6 23.0 22.2 8
17 10 273.0 267.4 3.4 4.2 - 6.4 7.8 9.3 9.3 9.3 12.7 12.7 12.7 15.1 18.3 21.4 25.4 28.6 25.4 10
18 12 323.8 318.5 4.0 4.6 - 6.4 8.4 9.5 9.5 10.3 14.3 12.7 12.7 17.5 21.4 25.4 28.6 33.3 25.4 12
19 14 355.6 355.6 4.0 4.8 6.4 7.9 9.5 9.5 9.5 11.1 15.1 - 12.7 19.0 23.8 27.8 31.8 35.7 - 14
20 16 406.4 406.4 4.2 4.8 6.4 7.9 9.5 9.5 9.5 12.7 16.7 - 12.7 21.4 26.2 31.0 36.5 40.5 - 16
21 18 457.2 457.2 4.2 4.8 6.4 7.9 11.1 9.5 9.5 14.3 19.0 - 12.7 23.8 29.4 34.9 39.7 45.2 - 18
22 20 508.0 508.0 4.8 5.5 6.4 9.5 12.7 9.5 9.5 15.1 20.6 - 12.7 26.2 32.5 38.1 44.4 50.0 - 20
23 22 558.8 558.8 4.8 5.5 6.4 9.5 12.7 9.5 9.5 - 22.2 - 12.7 28.6 34.9 41.3 47.6 54.0 - 22
24 24 609.6 609.6 5.5 6.4 6.4 9.5 14.3 9.5 9.5 17.5 24.6 - 12.7 31.0 38.9 46.0 52.4 59.5 - 24
25 26 660.4 660.4 - - 7.9 12.7 - - 9.5 - - - 12.7 - - - - - - 26
26 28 711.2 711.2 - - 7.9 12.7 15.9 - 9.5 - - - 12.7 - - - - - - 28
27 30 762.0 762.0 6.4 7.9 7.9 12.7 15.9 9.5 9.5 - - - 12.7 - - - - - - 30
28 32 812.8 812.8 - - 7.9 12.7 15.9 - 9.5 17.5 - - 12.7 - - - - - - 32
29 34 863.6 863.6 - - 7.9 12.7 15.9 - 9.5 17.5 - - 12.7 - - - - - - 34
30 36 914.4 914.4 - - 7.9 12.7 15.9 - 9.5 19.0 - - 12.7 - - - - - - 36
31 38 965.2 965.2 - - - - - - 9.5 - - - 12.7 - - - - - - 38
32 40 1016.0 1016.0 - - - - - - 9.5 - - - 12.7 - - - - - - 40
33 42 1066.8 1066.8 - - - - - - 9.5 - - - 12.7 - - - - - - 42
34 44 1117.6 1117.6 - - - - - - 9.5 - - - 12.7 - - - - - - 44
35 46 1168.4 1168.4 - - - - - - 9.5 - - - 12.7 - - - - - - 46
36 48 1219.2 1219.2 - - - - - - 9.5 - - - 12.7 - - - - - - 48
37                                          
Asterisks(*) denote ANSI B16.9('86) & B16.28 ('86)

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