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＊European Standards
Outside diameter
of pipe
ΦD		 10bar 14bar 16bar 20bar
Wall
thickness		 Theoretical
weight		 Wall
thickness		 Theoretical
weight		 Wall
thickness		 Theoretical
weight		 Wall
thickness		 Theoretical
weight
nominal actual actual   actual   actual   actual  
inch ND mm mm kg/m mm kg/m mm kg/m mm kg/m
SEAMLESS  
1/8   10 1.0 0.26 1.0 0.26 1.0 0.26 1.0 0.26
1/4   12 0.31 0.31 0.31 0.31
3/8 10 16 0.42 0.42 2.0 0.79 2.0 0.79
1/2 15 20 1.5 0.53 1.5 0.53 1.01 1.01
3/4 20 25 0.99 0.99 1.30 1.30
1 25 30 1.20 1.20 2.5 1.93 2.5 1.93
1 1/4 32 38 1.54 1.54 2.50 2.50
1 1/2 40 44.5 1.81 1.81 2.95 2.95
2 50 57 2.34 2.34 3.83 3.83
2 1/2 65 76.1 2.0 4.16 2.0 4.16 5.17 5.17
3 80 88.9 4.88 2.5 6.07 6.07 6.07
4 100 108 2.5 7.41 7.41 3.0 8.85 3.0 8.85
5 125 133 9.16 2.5 9.16 10.95 10.95
6 150 159 10.99 10.99 13.14 3.5 15.29
7 175 193.7 13.43 3.5 18.70 16.07 18.70
8 200 219.1 3.0 18.21 21.19 4.0 24.17 4.5 27.12
10 250 267 22.24 4.0 29.55 4.5 33.18 5.5 40.39
12 300 323.9 4.0 35.94 5.0 44.78 5.5 49.18 7.0 62.30
14 350 368 40.89 5.5 56.00 6.5 65.99 8.0 80.89
16 400 419 46.62 6.0 69.60 7.0 81.00 9.0 103.64
SEAMLESS or SEAM WELDED
18 450 457.2 4.0 50.91 7.0 88.2 8.0 100.93 9.5 119.45
20 500 508 4.5 63.63 7.5 105.1 8.5 119.24 11.0 153.54
SEAM WELDED  
24 600 610 5.0 84.96 9.0 151.4 10.5 176.79 13.0 217.97
28 700 711 6.0 118.80 10.5 205.9 12.0 235.58 15.0 293.22
32 800 813 135.99 12.0 269.1 13.5 303.14 17.0 380.06
36 900 914 8.0 203.57 13.5 340.4 15.5 391.14 19.0 477.60

＊U.S Standards
Outside diameter of pipe Wall thickness Theoretical weight
ΦD
nominal
inch 		actual
inch		 actual
mm		 actual
inch 		actual
mm 		Lb/Ft Kg/m
SEAMLESS  
1/8 0.405 10.29 0.058 1.47 0.24 0.36
1/4 0.540 13.72 0.065 1.65 0.38 0.56
3/8 0.675 17.15 0.48 0.72
1/2 0.840 21.34 0.61 0.91
3/4 1.050 26.67 0.78 1.16
1 1.315 33.40 0.99 1.47
1 1/4 1.660 42.16 0.072 1.83 1.39 2.07
1 1/2 1.900 48.27 1.60 2.39
2 2.375 60.32 0.083 2.11 2.32 3.45
2 1/2 2.875 73.03 2.82 4.20
3 3.500 88.90 0.095 2.41 3.93 5.85
3 1/2 4.000 101.60 4.51 6.71
4 4.500 114.30 0.109 2.77 5.83 8.68
5 5.563 141.30 0.125 3.18 8.29 12.34
6 6.625 168.30 0.134 3.40 10.58 15.75
8 8.625 219.10 13.83 20.59
SEAMLESS or SEAM WELDED  
10 10.750 273.05 0.134 3.40 17.29 25.74
12 12.750 323.90 0.156 3.96 23.90 35.58
14 14.000 355.60 0.165 4.19 27.78 41.35
16 16.000 406.40 31.80 47.33
18 18.000 457.20 0.180 4.57 39.03 58.10
20 20.000 508.00 43.41 64.62
SEAM WELDED  
24 24.000 609.60 0.180 4.57 52.17 77.66
30 30.000 762.00 0.250 6.35 90.54 134.77

＊U.S Standards

Outside diameter of pipe
ΦD

 Schedule 5S Schedule 10S
wall thickness Theoretical weight wall thickness Theoretical weight
nominal
inch		 actual
inch		 actual
mm		 actual Lb/Ft Kg/m actual Lb/Ft Kg/m
inch mm inch mm
SEAMLESS
1/8 0.405 10.29         0.049 1.24 0.19 0.28
1/4 0.540 13.72 0.065 1.65 0.33 0.49
3/8 0.675 17.15 0.065 1.65 0.42 0.63
1/2 0.840 21.34 0.065 1.65 0.54 0.80 0.083 2.11 0.67 1.00
3/4 1.050 26.67 0.065 1.65 0.69 1.03 0.083 2.11 0.86 1.28
1 1.315 33.40 0.065 1.65 0.87 1.30 0.109 2.77 1.40 2.09
1 1/4 1.660 42.16 0.065 1.65 1.11 1.65 0.109 2.77 1.81 2.70
1 1/2 1.900 48.27 0.065 1.65 1.28 1.91 0.109 2.77 2.09 3.11
2 2.375 60.32 0.065 1.65 1.61 2.40 0.109 2.77 2.64 3.93
2 1/2 2.875 73.03 0.083 2.11 2.48 3.69 0.120 3.05 3.53 5.26
3 3.500 88.90 0.083 2.11 3.03 4.51 0.120 3.05 4.33 6.45
3 1/2 4.000 101.60 0.083 2.11 3.48 5.18 0.120 3.05 4.97 7.40
4 4.500 114.30 0.083 2.11 3.92 5.84 0.120 3.05 5.61 8.36
5 5.563 141.30 0.109 2.77 6.36 9.47 0.134 3.40 7.77 11.57
6 6.625 168.30 0.109 2.77 7.60 11.32 0.134 3.40 9.29 13.84
8 8.625 219.10 0.109 2.77 9.93 14.79 0.148 3.76 13.40 19.96
10 10.750 273.05 0.134 3.40 15.19 22.63 0.165 4.19 18.65 27.78
12 12.750 323.90 0.156 3.96 20.98 31.25 0.180 4.57 24.17 36.00

＊U.S Standards
Outside diameter of pipe
ΦD		 Schedule 40S Schedule 80S
wall thickness Theoretical weight wall thickness Theoretical weight
nominal inch actual
inch		 actual
mm		 actual Lb/Ft Kg/m actual Lb/Ft Kg/m
inch mm inch mm
SEAMLESS
1/8 0.405 10.29 0.068 1.73 0.24 0.37 0.095 2.41 0.31 0.47
1/4 0.540 13.72 0.088 2.24 0.42 0.63 0.119 3.02 0.54 0.80
3/8 0.675 17.15 0.091 2.31 0.57 0.84 0.126 3.20 0.74 1.10
1/2 0.840 21.34 0.109 2.77 0.85 1.27 0.147 3.73 1.09 1.62
3/4 1.050 26.67 0.113 2.87 1.13 1.69 0.154 3.91 1.47 2.20
1 1.315 33.40 0.133 3.38 1.68 2.50 0.179 4.55 2.17 3.24
1 1/4 1.660 42.16 0.140 3.56 2.27 3.39 0.191 4.85 3.00 4.47
1 1/2 1.900 48.27 0.145 3.68 2.72 4.05 0.200 5.08 3.63 5.41
2 2.375 60.32 0.154 3.91 3.65 5.44 0.218 5.54 5.02 7.48
2 1/2 2.875 73.03 0.203 5.16 5.79 8.63 0.276 7.01 7.66 11.41
3 3.500 88.90 0.216 5.49 7.58 11.29 0.300 7.62 10.25 15.27
3 1/2 4.000 101.60 0.226 5.74 9.11 13.57 0.318 8.08 12.51 18.63
4 4.500 114.30 0.237 6.02 10.79 16.07 0.337 8.56 14.98 22.32
5 5.563 141.30 0.258 6.55 14.62 21.77 0.375 9.53 20.78 30.97
6 6.625 168.30 0.280 7.11 18.97 28.26 0.432 10.97 28.57 42.56
8 8.625 219.10 0.322 8.18 28.55 42.55 0.500 12.70 43.39 64.64
10 10.750 273.05 0.365 9.27 40.48 60.31 0.500 12.70 54.74 96.01
12 12.750 323.90 0.375 9.53 49.56 73.88 0.500 12.70 65.42 132.08

＊U.S Navy Standards
Outside diameter of pipe
ΦD		 Class 200 Class 700
Minimum
wall thickness		 Theoretical
weight		 Minimum
wall thickness		 Theoretical
weight
nominal
inch		 actual
inch		 actual
mm		 actual Lb/Ft Kg/m actual Lb/Ft Kg/m
inch mm inch mm
SEAMLESS  
  0.250 6.35 0.035 0.89 0.09 0.14  
  0.500 12.70 0.20 0.29 0.065 1.65 0.34 0.51
1/8 0.540 13.72 0.065 1.65 0.38 0.56 0.38 0.56
3/8 0.675 17.15 0.48 0.72 0.072 1.83 0.53 0.79
1/2 0.840 21.34 0.61 0.91 0.67 1.00
3/4 1.050 26.67 0.78 1.16 0.083 2.11 0.98 1.45
1 1.315 33.40 0.99 1.47 0.095 2.41 1.41 2.10
1 1/4 1.660 42.16 0.072 1.83 1.39 2.07 1.81 2.69
1 1/2 1.900 48.27 1.60 2.39 0.109 2.77 2.38 3.54
2 2.375 60.32 0.083 2.11 2.32 3.45 0.120 3.05 3.30 4.91
2 1/2 2.875 73.03 2.82 4.20 0.134 3.40 4.47 6.65
3 3.500 88.90 0.095 2.41 3.93 5.85 0.165 4.19 6.70 9.97
3 1/2 4.000 101.60 4.51 6.71 0.180 4.57 8.37 12.45
4 4.500 114.30 0.109 2.77 5.83 8.68 0.203 5.15 10.61 15.78
  5.000 127.00 0.120 3.05 7.14 10.62 11.84 17.62
5 5.563 141.30 0.125 3.18 8.29 12.34 0.220 5.59 14.32 21.30
6 6.625 168.30 0.134 3.40 10.58 15.75 0.259 6.58 20.08 29.89
7 7.625 193.70 12.21 18.17 0.284 7.21 25.38 37.76
8 8.625 219.10 0.148 3.76 15.28 22.74 0.340 8.64 34.32 51.07
  9.625 244.48 0.187 4.75 21.49 31.98 38.46 57.23
10 10.750 273.05 24.05 35.79 0.380 9.65 47.96 71.37
12 12.750 323.90 0.250 6.35 38.05 56.63 0.454 11.53 67.97 101.15
SEAMLESS or SEAM WELDED CLASS 50 CLASS 700
14 14.000 355.60 0.165 4.19 27.78 41.35 0.473 12.01 77.90 115.87
  15.000 381.00   0.503 12.77 88.80 132.04
16 16.000 406.40 0.165 4.19 31.80 47.32 0.534 13.56 101.00 149.58
18 18.000 457.20 0.180 4.57 39.03 58.10        
20 20.000 508.20 43.41 64.62
SEAM WELDED  
22 22.000 588.80 0.180 4.57 47.80 71.12        
  22.750 577.85 49.50 73.57
30 30.000 762.00 0.250 6.35 90.54 134.77
40 40.000 1016.00 0.312 7.92 150.70 224.19

＊Japanese maritime Specification
NOMINAL
DIAMETER		 Metric
size		 NAVY DIMENSION inch Size M.M(NDS)Size
5K 10K
ND inch Outside
diam.
mm		 Wall
thick
mm		 Theore
weight
Kg/m		 Outside
diam.
mm		 Wall
thick
mm		 Theore
weight
Kg/m		 Outside
diam.
mm 		Wall
thick
mm		 Theore
weight
Kg/m		 Outside
diam.
mm		 Wall
thick
mm		 Theore
weight
Kg/m
SEAMLESS  
6A 1/8     6.35 0.89 0.14  
10A 3/8 16 1.0 0.42 12.71 0.89 0.29 15 1.5 0.57
15A 1/2 20 0.53 15.14 1.21 0.47 15.14 1.65 0.62 20 0.78
20A 3/4 25 1.5 0.99 21.49 0.69 21.49 0.92 25 0.99
25A 1 30 1.20 28.25 1.42 1.07 28.25 1.23 30 1.20
32A 1 1/4 38 1.54 34.60 1.32 34.60 1.53 38 2 2.02
40A 1 1/2 44.5 1.81 40.95 1.58 40.95 1.83 2.01 45 2.41
50A 2 57 2.34 54.05 1.62 2.39 54.05 2.11 3.08 55 2.98
65A 2 1/2 76.1 2.0 4.16 66.75 2.96 66.75 2.41 4.35 70 3.82
80A 3 88.9 2.5 6.07 79.86 1.82 3.99 79.86 5.24 85 3 6.91
90A 3 1/2       95 7.75
100A 4 108 2.5 7.41 106.27 2.33 6.80 106.27 2.77 8.05 110 9.02
125A 5 133 9.16 131.67 8.46 131.67 3.18 11.47 130 10.70
150A 6 159 10.99 157.68 2.64 11.49 157.68 3.40 14.73 160 4 17.52
175A 7       180 19.77
200A 8 219.1 3.0 18.21 208.48 2.64 15.26 208.48 3.76 21.61 210 23.14
225A 9       230 25.39
250A 10 267 3.0 22.24 260.50 3.25 23.48 260.50 4.75 34.11 260 4.5 32.29
300A 12 323.9 4.0 35.94 312.11 3.68 31.87 312.11 6.35 54.52 310 5.5 47.03
350A 14 368 40.89  
400A 16 419 46.62
SEAMLESS or SEAM WELDED  
450A 18 457.2 4.0 50.91  
500A 20 508 4.5 63.63
SEAM WELDED  
600A 24 610 5.0 84.96  
700A 28 711 6.0 118.80