無縫管是一種具有中空截面、周邊沒有接縫的長條鋼材。全世界生產(chǎn)無縫管的共計有110多個國家的1850多個公司下的5100多個生產(chǎn)廠，其中生產(chǎn)石油管的有44個國家的170多個公司下的260多個廠。
| 無縫管重量參照表 |
| 單位：Kg/m | 壁 厚 |
| 外 徑 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 |
| 32 | 2.146 | 2.46 | 2.762 | 3.052 | 3.329 | 3.594 | 3.847 |
| 38 | 2.589 | 2.978 | 3.354 | 3.718 | 4.069 | 4.408 | 4.735 |
| 42 | 2.885 | 3.323 | 3.749 | 4.162 | 4.562 | 4.951 | 5.327 |
| 45 | 3.107 | 3.582 | 4.044 | 4.495 | 4.932 | 5.358 | 5.771 |
| 50 | 3.477 | 4.014 | 4.538 | 5.049 | 5.549 | 6.036 | 6.511 |
| 54 | 3.773 | 4.359 | 4.932 | 5.493 | 6.042 | 6.578 | 7.103 |
| 57 | 3.995 | 4.618 | 5.228 | 5.826 | 6.412 | 6.985 | 7.546 |
| 60 | 4.217 | 4.877 | 5.524 | 6.159 | 6.782 | 7.392 | 7.99 |
| 63.5 | 4.476 | 5.179 | 5.869 | 6.548 | 7.214 | 7.867 | 8.508 |
| 68 | 4.809 | 5.567 | 6.313 | 7.047 | 7.768 | 8.477 | 9.174 |
| 70 | 4.957 | 5.74 | 6.511 | 7.269 | 8.015 | 8.749 | 9.47 |
| 73 | 5.179 | 5.999 | 6.807 | 7.602 | 8.385 | 9.156 | 9.914 |
| 76 | 5.401 | 6.258 | 7.103 | 7.935 | 8.755 | 9.563 | 10.358 |
| 89 | 6.363 | 7.38 | 8.385 | 9.378 | 10.358 | 11.326 | 12.281 |
| 108 | 7.768 | 9.02 | 10.259 | 11.486 | 12.701 | 13.903 | 15.093 |
| 133 | 11.178 | 12.725 | 14.261 | 15.783 | 17.294 | 18.792 |
|
| 159 | 13.422 | 15.29 | 17.146 | 18.989 | 20.821 | 22.639 |
|
| 219 | 18.601 | 21.209 | 23.805 | 26.388 | 28.959 | 31.517 |
|
| 273 | 23.262 | 26.536 | 29.797 | 33.046 | 36.283 | 39.508 |
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| 325 | 27.75 | 31.665 | 35.568 | 39.458 | 43.337 | 47.202 |
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| 355 | 38.897 | 43.158 | 47.406 | 51.641 |
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| 377 | 41.339 | 45.871 | 50.39 | 54.897 |
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| 426 | 46.777 | 51.913 | 57.036 | 62.147 |
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| 450 |
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| 480 |
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| 530 |
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| 630 |
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| 單位：Kg/m | 壁 厚 |
| 外 徑 | 6.5 | 7 | 8 | 8.5 | 9 | 10 | 12 |
| 32 | 4.088 |
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| 38 | 5.049 |
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| 42 | 5.691 |
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| 45 | 6.172 |
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| 50 | 6.973 | 7.423 | 8.286 | 8.699 |
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| 54 | 7.614 | 8.114 | 9.075 | 9.538 |
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| 57 | 8.095 | 8.632 | 9.667 | 10.167 |
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| 60 | 8.576 | 9.149 | 10.259 | 10.796 |
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| 63.5 | 9.137 | 9.754 | 10.95 | 11.529 |
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| 68 | 9.858 | 10.53 | 11.838 | 12.473 |
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| 70 | 10.179 | 10.876 | 12.232 | 12.892 | 13.539 | 14.797 | 17.164 |
| 73 | 10.66 | 11.394 | 12.824 | 13.521 | 14.205 | 15.537 | 18.052 |
| 76 | 11.141 | 11.912 | 13.416 | 14.15 | 14.871 | 16.277 | 18.94 |
| 89 | 13.225 | 14.156 | 15.981 | 16.875 | 17.756 | 19.483 | 22.787 |
| 108 | 16.27 | 17.436 | 19.729 | 20.858 | 21.973 | 24.168 | 28.41 |
| 133 | 20.278 | 21.751 | 24.662 | 26.098 | 27.522 | 30.334 | 35.809 |
| 159 | 24.446 | 26.24 | 29.791 | 31.548 | 33.293 | 36.746 | 43.503 |
| 219 | 34.064 | 36.598 | 41.629 | 44.126 | 46.61 | 51.543 | 61.259 |
| 273 | 42.72 | 45.92 | 52.283 | 55.445 | 58.596 | 64.86 | 77.24 |
| 325 | 51.056 | 54.897 | 62.542 | 66.346 | 70.137 | 77.684 | 92.629 |
| 355 | 55.865 | 60.076 | 68.46 | 72.634 | 76.796 | 85.082 | 101.507 |
| 377 | 59.391 | 63.873 | 72.801 | 77.246 | 81.679 | 90.508 | 108.018 |
| 426 | 67.246 | 72.332 | 82.468 | 87.518 | 92.555 | 102.592 | 122.519 |
| 450 | 71.093 | 76.475 | 87.203 | 92.549 | 97.882 | 108.511 | 129.621 |
| 480 | 75.902 | 81.654 | 93.122 | 98.837 | 104.54 | 115.909 | 138.499 |
| 530 | 83.917 | 90.286 | 102.987 | 109.319 | 115.638 | 128.24 | 153.296 |
| 630 | 99.947 | 107.549 | 122.716 | 130.281 | 137.833 | 152.902 | 182.89 |
