The American ( ANSI/ASME/API ) standard, which is in imperial units, and the European ( DIN ) system, which is in metric units, are the two most prevalent Stainless Steel Pipe Size Standards. The Stainless Steel Pipe diameter is known as "Nominal Pipe Size" ( NPS ) or "Nominal Bore" in the American system ( NB ). It is known as the "Nominal Diameter" in the European system ( DN ).
The Stainless Steel Pipe Size ( IPS ) System gave rise to pipe schedules and Nominal Pipe Size ( NPS ). This technique of sizing created numbers to indicate the approximate dimensions of Stainless Steel Pipe Standard Weight Chart. Pipe makers produced piping with a very uniform thickness in the early days of the IPS.
| Designation of Diameter | O/D | Nominal Wall Thickness | ||||||||||||||||||
| DIA | SCH.5S | SCH.5 | SCH 10S | SCH.10 | SCH.20S | SCH.30 | SCH.40S | SCH.40 | SCH 60 | |||||||||||
| ( A ) | ( B ) | Meter MM | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr | Wall Thk | Weight Kg/Mtr |
| 6 | 1/8 | 10.3 | 1 | 0.23 | 1.2 | 0.27 | 1.5 | 0.33 | 1.73 | 0.37 | ||||||||||
| 8 | 1/4 | 13.7 | 1.2 | 0.37 | 1.65 | 0.49 | 2 | 0.58 | 2.24 | 0.64 | ||||||||||
| 10 | 3/8 | 17.2 | 1.2 | 0.47 | 1.65 | 0.63 | 2 | 0.74 | 2.31 | 0.87 | ||||||||||
| 15 | 1/2 | 21.3 | 1.65 | 0.01 | 1.65 | 0.81 | 2.11 | 1.02 | 2.11 | 1.02 | 2.5 | 1.15 | 2.77 | 1.29 | ||||||
| 20 | 3/4 | 26.7 | 1.65 | 1.03 | 1.65 | 1.03 | 2.11 | 1.3 | 2.11 | 1.3 | 2.5 | 1.49 | 2.87 | 1.71 | ||||||
| 25 | 1 | 33.4 | 1.65 | 1.31 | 1.65 | 1.31 | 2.77 | 2.13 | 2.77 | 2.13 | 3 | 2.24 | 3.38 | 2.54 | ||||||
| 32 | 11/4 | 24.2 | 1.65 | 1.67 | 1.65 | 1.67 | 2.77 | 2.73 | 2.77 | 2.73 | 3 | 2.9 | 3.56 | 3.44 | ||||||
| 40 | 11/2 | 48.3 | 1.65 | 1.93 | 1.65 | 1.93 | 2.77 | 3.16 | 2.77 | 3.16 | 3 | 3.35 | 3.68 | 4.11 | ||||||
| 50 | 2 | 60.3 | 1.65 | 1.93 | 1.65 | 2.42 | 2.77 | 3.99 | 2.77 | 3.99 | 3.5 | 4.9 | 3.91 | 5.52 | ||||||
| 65 | 21/2 | 73 | 2.11 | 3.75 | 2.11 | 3.75 | 3.05 | 5.34 | 3.05 | 5.34 | 3.5 | 6 | 5.16 | 8.77 | ||||||
| 80 | 3 | 88.9 | 2.11 | 4.59 | 2.11 | 4.59 | 3.05 | 6.56 | 3.05 | 6.56 | 4 | 8.37 | 5.49 | 11.47 | ||||||
| 90 | 31/2 | 101.6 | 2.11 | 5.25 | 2.11 | 5.25 | 3.05 | 7.53 | 3.05 | 7.53 | 4 | 9.62 | 5.74 | 13.78 | ||||||
| 100 | 4 | 114.3 | 2.11 | 5.93 | 2.11 | 5.93 | 3.05 | 8.5 | 3.05 | 8.5 | 4.5 | 12.18 | 6.02 | 6.32 | ||||||
| 125 | 5 | 141.3 | 2.77 | 9.61 | 2.77 | 9.61 | 3.4 | 11.74 | 3.43 | 11.74 | 5 | 16.8 | 6.55 | 2210 | ||||||
| 150 | 6 | 168.3 | 2.77 | 11.47 | 2.77 | 11.47 | 3.4 | 14.04 | 3.43 | 14.04 | 5.5 | 22.08 | 7.11 | 28.69 | ||||||
| 200 | 8 | 219.1 | 2.77 | 15 | 2.77 | 15 | 3.76 | 20.77 | 3.76 | 20.27 | 6.35 | 33.82 | 7.04 | 37.38 | 8.18 | 43.2 | 10.81 | 53.9 | ||
| 250 | 10 | 273.1 | 3.4 | 22.95 | 3.4 | 22.95 | 4.19 | 28.2 | 4.19 | 28.2 | 6.35 | 42.41 | 7.8 | 51.81 | 9.27 | 61.22 | 12.2 | 82.8 | ||
| 300 | 12 | 323.9 | 3.96 | 31.72 | 4.19 | 33.6 | 4.57 | 36.54 | 4.57 | 36.54 | 6.35 | 50.48 | 8.38 | 66.2 | 9.53 | 75.01 | 10.31 | 80.94 | 14.27 | 110.62 |
| 350 | 14 | 355.6 | 3.96 | 34.86 | 4.78 | 41.99 | 6.35 | 55.53 | 7.92 | 68.95 | 9.53 | 82.58 | 9.53 | 82.58 | 11.13 | 96 | 15.06 | 128.42 | ||
| 400 | 16 | 406.4 | 4.19 | 42.2 | 4.78 | 48.07 | 6.35 | 63.61 | 7.92 | 79.03 | 9.53 | 94.7 | 9.53 | 94.7 | 12.7 | 125.2 | 16.66 | 162.59 | ||
| 450 | 18 | 457.2 | 4.19 | 47.46 | 4.78 | 54.15 | 6.35 | 71.69 | 7.92 | 89.1 | 11.13 | 124.32 | 9.53 | 106.83 | 14.27 | 158.27 | 19.05 | 209 | ||
| 500 | 2C | 508 | 4.78 | 60.23 | 5.54 | 69.7 | 6.35 | 79.76 | 9.53 | 118.93 | 12.7 | 157.51 | 9.53 | 118.9 | 15.06 | 185.89 | 2062 | 251.65 | ||
| 550 | 22 | 558.8 | 4.78 | 65.95 | 5.54 | 76.75 | 6.35 | 87.84 | 9.53 | 131.07 | 12.7 | 173.66 | 9.53 | 131.07 | 15.88 | 216.04 | 22.23 | 298.55 | ||
| 600 | 24 | 609.6 | 5.54 | 83.8 | 6.35 | 95.92 | 6.35 | 95.92 | 9.53 | 143.2 | 14.27 | 212.72 | 9.53 | 143.2 | 17.45 | 258.74 | 24.59 | 360.21 | ||
| 650 | 26 | 660.4 | 7.92 | 129.4 | 12.7 | 205.97 | 9.53 | 155.32 | ||||||||||||
| 700 | 28 | 711.2 | 7.92 | 139.47 | 12.7 | 222.13 | 15.88 | 276.48 | 9.53 | 167.44 | ||||||||||
| 750 | 3C | 762 | 6.35 | 120.15 | 7.92 | 149.55 | 7.92 | 149.55 | 12.7 | 238.28 | 15.88 | 296.68 | 9.53 | 179.56 | ||||||
| 800 | 32 | 812.8 | 7.92 | 159.62 | 12.7 | 254.44 | 15.88 | 316.88 | 9.53 | 191.69 | 17.48 | 348.11 | ||||||||
| 850 | 34 | 863.6 | 7.92 | 169.64 | 12.7 | 270.5 | 15.88 | 336.96 | 9.53 | 203.74 | 17.48 | 370.22 | ||||||||
| 900 | 36 | 914.4 | 7.92 | 179.77 | 12.7 | 286.75 | 15.88 | 357.28 | 9.53 | 215.93 | 19.05 | 427.09 | ||||||||
| PIPE SIZE | O.D. | 5s | True 5 | 10s | True 10 | 20 | 30 | True 40 | STD. | 60 | True 80 | XH | 100 | 120 | 140 | True 160 | XXH |
| 1/8 | 0.405 | .035 .1383 |
.049 .1863 |
.049 .1863 |
.068 .2447 |
.0668 .2447 |
.095 .3145 |
.095 .3145 |
|||||||||
| 1/4 | 0.540 | .049 .2570 |
.065 . 3297 |
.065 .3297 |
.088 .4248 |
.088 .4248 |
.119 .5351 |
.119 .5351 |
|||||||||
| 3/8 | 0.675 | .049 .3276 |
.065 .4235 |
.065 .4235 |
.091 .5676 |
.091 .5676 |
.126 .7388 |
.126 .7388 |
|||||||||
| 1/2 | 0.840 | .065 .5383 |
.065 .5380 |
.083 .6710 |
.083 .6710 |
.109 .8510 |
.109 .8510 |
.147 1.088 |
.147 1.088 |
.187 1.304 |
.294 1.714 |
||||||
| 3/4 | 1.050 | .065 .6838 |
.065 .6838 |
.083 .8572 |
.083 .8572 |
.113 1.131 |
.113 1.131 |
.154 1.474 |
.154 1.474 |
.218 1.937 |
.308 2.441 |
||||||
| 1 | 1.315 | .065 .8678 |
.065 .8678 |
.109 1.404 |
.109 1.404 |
.133 1.679 |
.133 1.679 |
.179 2.172 |
.179 2.172 |
.250 3.765 |
.382 5.214 |
||||||
| 1 1/4 | 1.660 | .065 1.107 |
.065 1.107 |
.109 1.806 |
.109 1.806 |
.140 2.273 |
.140 2.273 |
.191 2.997 |
.191 2.997 |
.250 3.765 |
.382 5.214 |
||||||
| 1 1/2 | 1.900 | .065 1.274 |
.065 1.274 |
.109 2.085 |
.109 2.085 |
.145 2.718 |
.145 2.718 |
.200 3.631 |
.200 3.631 |
.281 4.859 |
.400 6.408 |
||||||
| 2 | 2.375 | .065 1.604 |
.065 1.604 |
.109 2.638 |
.109 2.638 |
.154 3.653 |
.154 3.653 |
.218 5.022 |
.218 5.022 |
.343 7.444 |
.436 9.029 |
||||||
| 2 1/2 | 2.875 | .083 2.475 |
.083 2.475 |
.120 3.531 |
.120 3.531 |
.203 5.793 |
.203 5.793 |
.276 7.661 |
.276 7.661 |
.375 10.01 |
.552 13.70 |
||||||
| 3 | 3.5 | .083 3.029 |
.083 3.029 |
.120 4.332 |
.120 4.332 |
.216 7.576 |
.216 7.576 |
.300 10.25 |
.300 10.25 |
.438 14.32 |
.600 18.58 |
||||||
| 3 1/2 | 4.0 | .083 3.472 |
.083 3.472 |
.120 4.973 |
.120 4.973 |
.226 9.109 |
.226 9.109 |
.318 12.51 |
.318 12.51 |
.636 22.85 |
|||||||
| 4 | 4.5 | .083 3.915 |
.083 3.915 |
.120 5.613 |
.120 5.613 |
.237 10.79 |
.237 10.79 |
.281 12.66 |
.337 14.98 |
.337 14.98 |
.438 19.00 |
.531 22.51 |
.674 27.54 |
||||
| 4 1/2 | 5.0 | .247 12.53 |
.355 17.61 |
.710 32.53 |
|||||||||||||
| 5 | 5.563 | .109 6.349 |
.109 6.349 |
.134 7.770 |
.134 7.770 |
.258 14.62 |
.258 14.62 |
.375 20.78 |
.375 20.78 |
.500 27.04 |
.625 32.96 |
.750 38.55 |
|||||
| 6 | 6.625 | .109 7.585 |
.109 7.585 |
.134 9.290 |
.134 9.289 |
.280 18.97 |
.280 18.97 |
.432 28.57 |
.432 28.57 |
.562 36.39 |
.719 45.30 |
.864 53.16 |
|||||
| 7 | 7.625 | .301 23.57 |
.500 38.05 |
.875 63.08 |
|||||||||||||
| 8 | 8.625 | .109 9.914 |
.109 9.914 |
.148 13.40 |
.148 13.40 |
.250 22.36 |
.277 24.70 |
.322 28.55 |
.322 28.55 |
.406 35.64 |
.500 43.39 |
.500 43.39 |
.594 50.87 |
.719 60.63 |
.812 67.76 |
.906 74.69 |
.875 72.42 |
| 9 | 9.625 | .342 33.90 |
.500 48.72 |
||||||||||||||
| 10 | 10.75 | .134 15.19 |
.134 15.19 |
.165 18.65 |
.165 18.70 |
.250 28.04 |
.307 34.24 |
.365 40.48 |
.365 40.48 |
.500 54.74 |
.594 64.33 |
.500 54.74 |
.719 76.93 |
.844 89.20 |
1.000 104.1 |
1.125 115.6 |
|
| 11 | 11.75 | .375 45.55 |
.500 60.07 |
||||||||||||||
| 12 | 12.75 | .156 21.07 |
.165 22.18 |
.180 24.16 |
.180 24.20 |
.250 33.38 |
.330 43.77 |
.406 53.53 |
.375 49.56 |
.562 73.16 |
.688 88.51 |
.500 65.42 |
.844 107.2 |
1.000 125.5 |
1.125 139.7 |
1.312 160.3 |
|
| 14 | 14.0 | .156 23.07 |
.188 27.73 |
.250 36.71 |
.312 45.68 |
.375 54.57 |
.437 63.37 |
.375 54.57 |
.594 84.91 |
.750 106.1 |
.500 72.09 |
.938 130.7 |
1.094 150.7 |
1.250 170.2 |
1.406 189.1 |
||
| 16 | 16.0 | .165 27.90 |
.188 31.75 |
.250 42.05 |
.312 52.36 |
.375 62.58 |
.500 82.77 |
.375 62.58 |
.656 107.5 |
.844 136.5 |
.500 82.77 |
1.031 164.8 |
1.219 192.3 |
1.438 223.5 |
1.593 245.1 |
||
| 18 | 18.0 | .165 31.43 |
.188 35.76 |
.250 47.39 |
.312 59.03 |
.437 82.06 |
.562 104.8 |
.375 70.59 |
.750 138.2 |
.938 170.8 |
.500 93.45 |
1.156 208.0 |
1.375 244.1 |
1.562 274.2 |
1.781 308.5 |
||
| 20 | 20.0 | .188 39.78 |
.218 46.05 |
.250 52.73 |
.375 78.60 |
.500 104.1 |
.594 122.9 |
.375 78.60 |
.812 166.4 |
1.031 208.9 |
.500 104.1 |
1.281 256.1 |
1.500 296.4 |
1.750 341.1 |
1.968 379.0 |
||
| 22 | 22.0 | .250 58.07 |
.375 86.61 |
.500 114.81 |
.375 86.61 |
.875 197.42 |
1.125 250.82 |
.500 114.81 |
1.357 302.88 |
1.625 353.61 |
1.875 403.01 |
2.125 451.07 |
|||||
| 24 | 24.0 | .218 55.37 |
.250 63.41 |
.250 63.41 |
.375 94.62 |
.562 140.8 |
.687 171.2 |
.375 94.62 |
.969 238.1 |
1.219 296.4 |
.500 125.5 |
1.531 367.4 |
1.812 429.4 |
2.062 483.1 |
2.343 541.9 |
||
| 26 | 26.0 | .312 85.73 |
.375 102.63 |
.500 136.17 |
|||||||||||||
| 30 | 30.0 | .250 79.43 |
.312 98.93 |
.312 99.08 |
.625 196.08 |
.375 118.65 |
.500 157.53 |
||||||||||
| 34 | 34.0 | .312 112.43 |
.625 222.78 |
.688 244.60 |
.375 134.67 |
.500 178.89 |
|||||||||||
| 36 | 36.0 | .312 119.11 |
.625 236.13 |
.688 282.36 |
.375 142.68 |
.500 189.57 |
|||||||||||
| 42 | 42.0 | .625 276.17 |
.688 330.41 |
.375 166.71 |
.500 221.61 |
||||||||||||
| PIPE SIZE | O.D. | 5s | True 5 | 10s | True 10 | 20 | 30 | True 40 | STD. | 60 | True 80 | XH | 100 | 120 | 140 | True 160 | XXH |
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