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Wall Thickness of Welded And Seamles Pipe(ANSI / API / JIS)

Nominal
Pipe Size 		Outside
Diameter 		Nominal Wall Thickness Nominal Pipe
Size Inch
A B KS/JIS ANSI SPP SGP Sch 5s Sch 10s Sch 10 Sch 20s Sch 20 Sch 30 Sch 40s STD Sch 40
6
⅛
 10.50 10.29 - - 1.24 - 1.5 - - 1.73 1.73 1.73 ⅛
8 ¼ 13.80 13.72 - - 1.65 - 2.0 - - 2.24 2.24 2.24 ¼
10 ⅜ 17.30 17.14 - - 1.65 - 2.0 - - 2.31 2.31 2.31 ⅜
15 ½ 21.70 21.34 2.8 1.65 2.11 - 2.5 - - 2.77 2.77 2.77 ½
20 ¾ 27.20 26.67 2.8 1.65 2.11 - 2.5 - - 2.87 2.87 2.87 ¾
25 1 34.00 33.40 3.2 1.65 2.77 - 3.0 - - 3.38 3.38 3.38 1
32 1¼ 42.70 42.16 3.5 1.65 2.77 - 3.0 - - 3.56 3.56 3.56 1¼
40 1½ 48.60 48.26 3.5 1.65 2.77 - 3.0 - - 3.68 3.68 3.68 1½
50 2 60.50 60.32 3.8 1.65 2.77 - 3.5 3.20 - 3.91 3.91 3.91 2
65 2½ 76.30 73.02 4.2 2.11 3.05 - 3.5 4.50 - 5.16 5.16 5.16 2½
80 3 98.10 88.90 4.2 2.11 3.05 - 4.0 4.50 - 5.49 5.49 5.49 3
90 3½ 101.60 101.60 4.2 2.11 3.05 - 4.0 4.50 - 5.74 5.74 5.74 3½
100 4 114.30 114.30 4.5 2.11 3.05 - 4.0 4.90 - 6.02 6.02 6.02 4
125 5 139.80 141.30 4.5 2.77 3.40 - 5.0 5.10 - 6.55 6.55 6.55 5
150 6 165.20 168.30 5.0 2.77 3.40 - 5.0 5.50 - 7.11 7.11 7.11 6
200 8 216.30 219.08 5.8 2.77 3.76 - 6.5 6.35 7.04 8.18 8.18 8.18 8
250 10 267.40 273.05 6.6 3.40 4.19 - 6.5 6.35 7.80 9.27 9.27 9.27 10
300 12 318.50 323.80 6.9 3.96 4.57 - 6.5 6.35 8.38 9.52 9.52 10.31 12
350 14 355.60 355.60 7.9 3.96 4.78 6.35 8.0 7.92 9.52 *9.52 9.52 11.13 14
400 16 406.40 406.40 7.9 4.19 4.78 6.35 8.0 7.92 9.52 *9.52 9.52 12.70 16
450 18 457.20 457.20 7.9 4.19 4.78 6.35 8.0 7.92 11.12 *9.52 9.52 14.27 18
500 20 508.00 508.00 7.9 4.78 5.54 6.35 9.5 9.52 12.70 *9.52 9.52 15.09 20
550 22 558.80 558.00 4.78 5.54 6.35 - 9.52 12.70 *9.52 9.52 15.87 22
600 24 609.60 609.60 - 5.54 6.35 6.35 - 9.52 14.27 *9.52 9.52 17.48 24
650 26 660.40 660.40 - - *7.92 7.92 - 12.70 - *9.52 9.52 - 26
700 28 711.20 711.20 - - *7.92 7.92 - 12.70 15.88 *9.52 9.52 - 28
750 30 762.00 762.00 - 6.35 *7.92 7.92 - 12.70 15.88 *9.52 9.52 - 30
800 32 812.80 812.80 - - *7.92 7.92 - 12.70 15.88 *9.52 9.52 17.48 32
850 34 863.60 863.60 - - *7.92 7.92 - 12.70 15.88 *9.52 9.52 17.48 34
900 36 914.40 914.40 - - *7.92 7.92 - 12.70 15.88 *9.52 9.52 19.05 36
950 38 965.20 965.20 - - *7.92 - - - - *9.52 9.52 - 38
1000 40 1016.00 1016.00 - - *7.92 - - - - *9.52 9.52 - 40
1050 42 1066.80 1066.80 - *7.92 - - - - *9.52 9.52 - 42
1100 44 1117.60 1117.60 - - *7.92 - - - - *9.52 9.52 - 44
1150 46 1168.40 1168.40 - - *7.92 - - - - *9.52 9.52 - 46
1200 48 1219.20 1219.20 - - *7.92 - - - - *9.52 9.52 - 48

Nominal
Pipe Size 		Outside
Diameter 		Nominal Wall Thickness Nominal Pipe
Size Inch
A B KS/JIS ANSI Sch 60 Sch 80s X-S Sch 80 Sch 100 Sch 120 Sch 140 Sch 160 XX-S
6
⅛
 10.50 10.29 2.20 2.41 2.41 2.41 - - - 3.15 4.83 ⅛
8 ¼ 13.80 13.72 2.40 3.02 3.02 3.02 - - - 3.68 6.05 ¼
10 ⅜ 17.30 17.14 2.80 3.20 3.20 3.20 - - - 4.01 6.40 ⅜
15 ½ 21.70 21.34 3.20 3.73 3.73 3.73 - - - 4.78 7.47 ½
20 ¾ 27.20 26.67 3.40 3.91 3.91 3.91 - - - 5.56 7.82 ¾
25 1 34.00 33.40 3.90 4.55 4.55 4.55 - - - 6.35 9.09 1
32 1¼ 42.70 42.16 4.50 4.85 4.85 4.85 - - - 6.35 9.70 1¼
40 1½ 48.60 48.26 4.50 5.08 5.08 5.08 - - - 7.14 10.16 1½
50 2 60.50 60.32 4.90 5.54 5.54 5.54 - - - 8.74 11.07 2
65 2½ 76.30 73.02 6.00 7.01 7.01 7.01 - - - 9.52 14.02 2½
80 3 89.10 88.90 6.60 7.62 7.62 7.62 - - - 11.12 15.24 3
90 3½ 101.60 101.60 7.00 8.08 8.08 8.08 - - - - 16.15 3½
100 4 114.30 114.30 7.10 8.56 8.56 8.56 - 11.12 - 13.49 17.12 4
125 5 139.80 141.30 8.10 9.53 9.53 9.53 - 12.70 - 15.88 19.05 5
150 6 165.20 168.30 9.30 10.97 10.97 10.97 - 14.27 - 18.26 21.94 6
200 8 216.30 219.08 10.31 12.70 12.70 12.70 15.09 18.26 20.62 23.10 22.22 8
250 10 267.40 273.05 12.70 12.70 12.70 15.09 18.26 21.44 25.40 28.58 25.40 10
300 12 318.50 323.80 14.27 12.70 12.70 17.48 21.44 25.40 28.58 33.32 25.40 12
350 14 355.60 355.60 15.09 *12.70 12.70 19.05 23.83 27.79 31.75 35.71 - 14
400 16 406.40 406.40 16.66 *12.70 12.70 21.44 26.19 30.96 36.52 40.49 - 16
450 18 457.20 457.20 19.05 *12.70 12.70 23.82 29.36 34.92 39.67 45.24 - 18
500 20 508.00 508.00 20.62 *12.70 12.70 26.19 32.54 38.10 44.45 50.01 - 20
550 22 558.80 558.00 22.22 *12.70 12.70 28.58 34.92 41.28 47.62 53.98 - 22
600 24 609.60 609.60 24.61 *12.70 12.70 30.96 38.89 46.02 52.37 59.54 - 24
650 26 660.40 660.40 - *12.70 12.70 - - - - - - 26
700 28 711.20 711.20 - *12.70 12.70 - - - - - - 28
750 30 762.00 762.00 - *12.70 12.70 - - - - - - 30
800 32 812.80 812.80 - *12.70 12.70 - - - - - - 32
850 34 863.60 863.60 - *12.70 12.70 - - - - - - 34
900 36 914.40 914.40 - *12.70 12.70 - - - - - - 36
950 38 965.20 965.20 - *12.70 12.70 - - - - - - 38
1000 40 1016.00 1016.00 - *12.70 12.70 - - - - - - 40
1050 42 1066.80 1066.80 - *12.70 12.70 - - - - - - 42
1100 44 1117.60 1117.60 - *12.70 12.70 - - - - - - 44
1150 46 1168.40 1168.40 - *12.70 12.70 - - - - - - 46
1200 48 1219.20 1219.20 - *12.70 12.70 - - - - - - 48