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<p>Tổng hợp các loại tiêu chuẩn ống thép đúc, tiêu chuẩn ống thép đen, tiêu chuẩn ống thép mạ kẽm</p><h2>1. Bảng quy cách kích thước &amp; khối lượng tiêu chuẩn ống thép đen tròn</h2><table><colgroup><col><col><col><col></colgroup><tbody><tr><td colspan="2">Chiều dài thành ống (mm)</td><td rowspan="2">Cây/Bộ Bar/Bundle</td><td colspan="18">Khối lượng ống ứng với chiều dày thành ống (Kg/6m)</td></tr><tr><td>Quy Cách (mm) Outside Dlmension</td><td> </td><td>0.6</td><td>0.7</td><td>0.8</td><td>0.9</td><td>1.0</td><td>1.1</td><td>1.2</td><td>1.4</td><td>1.5</td><td>1.6</td><td>1.8</td><td>2.0</td><td>2.5</td><td>2.6</td><td>2.8</td><td>3.0</td><td>3.2</td><td>3.5</td></tr><tr><td>Phi</td><td>12,7</td><td>20</td><td>1.074</td><td>1.243</td><td>1.409</td><td>1.571</td><td>1.731</td><td>1.888</td><td>2.042</td><td>2.341</td><td>2.486</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>13,8</td><td>20</td><td>1.172</td><td>1.357</td><td>1.539</td><td>1.718</td><td>1.894</td><td>2.067</td><td>2.237</td><td>2.569</td><td>2.730</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>15,9</td><td>20</td><td>1.358</td><td>1.574</td><td>1.787</td><td>1.997</td><td>2.205</td><td>2.409</td><td>2.610</td><td>3.004</td><td>3.196</td><td>3.385</td><td>3.755</td><td>4.113</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>19,1</td><td>20</td><td>1.642</td><td>1.906</td><td>2.166</td><td>2.424</td><td>2.678</td><td>2.930</td><td>3.178</td><td>3.666</td><td>3.906</td><td>4.143</td><td>4.607</td><td>5.060</td><td>6.140</td><td> </td><td> </td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>21</td><td>20</td><td>1.811</td><td>2.103</td><td>2.391</td><td>2.677</td><td>2.959</td><td>3.239</td><td>3.516</td><td>4.060</td><td>4.328</td><td>4.593</td><td>5.113</td><td>5.622</td><td>6.843</td><td>7.078</td><td> </td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>22,2</td><td>20</td><td>1.918</td><td>2.227</td><td>2.533</td><td>2.836</td><td>3.137</td><td>3.434</td><td>3.729</td><td>4.309</td><td>4.594</td><td>4.877</td><td>5.433</td><td>5.978</td><td>7.287</td><td>7.540</td><td> </td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>25,4</td><td>20</td><td>2.202</td><td>2.558</td><td>2.912</td><td>3.263</td><td>3.610</td><td>3.955</td><td>4.297</td><td>4.971</td><td>5.304</td><td>5.634</td><td>6.285</td><td>6.925</td><td>8.471</td><td>8.771</td><td> </td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>27</td><td>20</td><td>2.344</td><td>2.724</td><td>3.101</td><td>3.476</td><td>3.847</td><td>4.215</td><td>4.581</td><td>5.303</td><td>5.659</td><td>6.013</td><td>6.711</td><td>7.398</td><td>9.063</td><td>9.387</td><td> </td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>28</td><td>20</td><td>2.432</td><td>2.828</td><td>3.220</td><td>3.609</td><td>3.995</td><td>4.378</td><td>4.758</td><td>5.510</td><td>5.881</td><td>6.250</td><td>6.978</td><td>7.694</td><td>9.432</td><td>9.771</td><td>10.440</td><td> </td><td> </td><td> </td></tr><tr><td>Phi</td><td>28,6</td><td>20</td><td>2.486</td><td>2.890</td><td>3.291</td><td>3.689</td><td>4.084</td><td>4.476</td><td>4.865</td><td>5.634</td><td>6.015</td><td>6.392</td><td>7.138</td><td>7.871</td><td>9.654</td><td>10.002</td><td>10.689</td><td>11.363</td><td> </td><td> </td></tr><tr><td>Phi</td><td>31,8</td><td>20</td><td> </td><td>3.221</td><td>3.669</td><td>4.115</td><td>4.557</td><td>4.997</td><td>5.433</td><td>6.297</td><td>6.725</td><td>7.149</td><td>7.990</td><td>8.818</td><td>10.838</td><td>11.233</td><td>12.014</td><td>12.784</td><td> </td><td> </td></tr><tr><td>Phi</td><td>34</td><td>20</td><td> </td><td>3.449</td><td>3.930</td><td>4.408</td><td>4.883</td><td>5.355</td><td>5.824</td><td>6.753</td><td>7.213</td><td>7.670</td><td>8.576</td><td>9.469</td><td>11.652</td><td>12.079</td><td>12.926</td><td>13.760</td><td>14.583</td><td> </td></tr><tr><td>Phi</td><td>38,1</td><td>20</td><td> </td><td>3.874</td><td>4.415</td><td>4.954</td><td>5.489</td><td>6.022</td><td>6.552</td><td>7.602</td><td>8.123</td><td>8.641</td><td>9.668</td><td>10.683</td><td>13.168</td><td>13.657</td><td>14.624</td><td>15.580</td><td>16.524</td><td> </td></tr><tr><td>Phi</td><td>42</td><td>20</td><td> </td><td> </td><td>4.877</td><td>5.473</td><td>6.066</td><td>6.657</td><td>7.244</td><td>8.410</td><td>8.989</td><td>9.564</td><td>10.706</td><td>11.837</td><td>14.611</td><td>15.157</td><td>16.240</td><td>17.311</td><td>18.371</td><td>19.938</td></tr><tr><td>Phi</td><td>44,4</td><td>20</td><td> </td><td> </td><td>5.161</td><td>5.793</td><td>6.421</td><td>7.047</td><td>7.670</td><td>8.907</td><td>9.521</td><td>10.132</td><td>11.346</td><td>12.547</td><td>15.499</td><td>16.080</td><td>17.234</td><td>18.377</td><td>19.507</td><td>21.180</td></tr><tr><td>Phi</td><td>49</td><td>20</td><td> </td><td> </td><td>5.705</td><td>6.405</td><td>7.102</td><td>7.796</td><td>8.487</td><td>9.860</td><td>10.542</td><td>11.221</td><td>12.571</td><td>13.908</td><td>17.200</td><td>17.850</td><td>19.140</td><td>20.418</td><td>21.685</td><td>23.563</td></tr><tr><td>Phi</td><td>50,8</td><td>20</td><td> </td><td> </td><td>5.918</td><td>6.645</td><td>7.368</td><td>8.089</td><td>8.807</td><td>10.233</td><td>10.942</td><td>11.647</td><td>13.050</td><td>14.441</td><td>17.866</td><td>18.542</td><td>19.886</td><td>21.217</td><td>22.537</td><td>24.495</td></tr><tr><td>Phi</td><td>60</td><td>20</td><td> </td><td> </td><td> </td><td>7.870</td><td>8.730</td><td>9.586</td><td>10.440</td><td>12.139</td><td>12.983</td><td>13.825</td><td>15.500</td><td>17.163</td><td>21.269</td><td>22.082</td><td>23.697</td><td>25.301</td><td>26.893</td><td>29.259</td></tr><tr><td>Phi</td><td>63,5</td><td>20</td><td> </td><td> </td><td> </td><td> </td><td> </td><td>10.156</td><td>11.061</td><td>12.864</td><td>13.760</td><td>14.654</td><td>16.432</td><td>18.199</td><td>22.564</td><td>23.428</td><td>25.147</td><td>26.855</td><td>28.550</td><td>31.072</td></tr><tr><td>Phi</td><td>76,2</td><td>10</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>13.316</td><td>15.494</td><td>16.579</td><td>17.661</td><td>19.815</td><td>21.957</td><td>27.262</td><td>28.314</td><td>30.409</td><td>32.492</td><td>34.563</td><td>37.648</td></tr><tr><td>Phi</td><td>89,1</td><td>10</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>18.167</td><td>19.442</td><td>20.714</td><td>23.250</td><td>25.775</td><td>32.033</td><td>33.276</td><td>35.753</td><td>38.218</td><td>40.671</td><td>44.329</td></tr><tr><td>Phi</td><td>101,6</td><td>10</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>22.216</td><td>23.674</td><td>26.580</td><td>29.474</td><td>36.657</td><td>38.085</td><td>40.932</td><td>43.767</td><td>46.590</td><td>50.802</td></tr><tr><td>Phi</td><td>114,3</td><td>10</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>25.035</td><td>26.680</td><td>29.962</td><td>33.232</td><td>41.355</td><td>42.971</td><td>46.193</td><td>49.404</td><td>52.603</td><td>57.379</td></tr><tr><td>Phi</td><td>127</td><td>10</td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td> </td><td>27.853</td><td>29.687</td><td>33.344</td><td>36.990</td><td>46.053</td><td>47.856</td><td>51.455</td><td>55.041</td><td>58.616</td><td>63.956</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td colspan="8">Dung sai về khối lượng: (Tolerance on VVeight) ±8%</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table><h2>2. Bảng tiêu chuẩn ống thép mạ kẽm</h2><table><colgroup><col><col><col><col><col><col><col><col><col><col><col><col><col><col></colgroup><tbody><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td colspan="2">BS 1387-1985 (EN 10255)</td></tr><tr><td rowspan="3">Cấp độ</td><td colspan="2" rowspan="2">Kích thước danh nghĩa</td><td colspan="4">Đường kính ngoài</td><td colspan="2" rowspan="2">Đọ dày</td><td colspan="4">Trọng Lượng</td><td rowspan="3">Số ống / bó</td></tr><tr><td colspan="2">Max</td><td colspan="2">IS/l i n</td><td colspan="2">Đầu thẳng</td><td colspan="2">Ren rang có đầu mối</td></tr><tr><td>in</td><td>A</td><td>in</td><td>mm</td><td>in</td><td>mm</td><td>in</td><td>mm</td><td>kg / ft</td><td>k:g / m</td><td>kg / ft</td><td>kg / m</td></tr><tr><td rowspan="12">Siêu nhẹ (A1 )</td><td>3/8</td><td>1 0</td><td>0.673</td><td>17.1</td><td>0.657</td><td>16.7</td><td>0.063</td><td>1 .6</td><td>0.1 84</td><td>0.604</td><td>0.1 99</td><td>0.652</td><td>217</td></tr><tr><td>1 /2</td><td>1 5</td><td>0.843</td><td>21.4</td><td>0.827</td><td>21.0</td><td>0.075</td><td>1 .9</td><td>0.276</td><td>0.904</td><td>0.281</td><td>0.922</td><td>2 17</td></tr><tr><td>3/4</td><td>20</td><td>1 .059</td><td>26.9</td><td>1 .039</td><td>26.4</td><td>0.083</td><td>2.1</td><td>0.388</td><td>1 .274</td><td>0.395</td><td>1 .296</td><td>1 27</td></tr><tr><td>1</td><td>25</td><td>1 .331</td><td>33.8</td><td>1 .307</td><td>33.2</td><td>0.091</td><td>2.3</td><td>0.539</td><td>1 .770</td><td>0.550</td><td>1 .803</td><td>91</td></tr><tr><td>1/4</td><td>32</td><td>1 .673</td><td>42.5</td><td>1 .650</td><td>41.9</td><td>0.091</td><td>2.3</td><td>0.690</td><td>2.263</td><td>0.701</td><td>2.301</td><td>61</td></tr><tr><td>'Ị 1/2</td><td>40</td><td>1 .906</td><td>48.4</td><td>1 .882</td><td>47.8</td><td>0.098</td><td>2.5</td><td>0.857</td><td>2.811</td><td>0.870</td><td>2.855</td><td>61</td></tr><tr><td>2</td><td>50</td><td>2.370</td><td>60.2</td><td>2.346</td><td>59.6</td><td>0.079</td><td>2.0</td><td>0.871</td><td>2.856</td><td>-</td><td>-</td><td>37</td></tr><tr><td>2</td><td>50</td><td>2.370</td><td>60.2</td><td>2.346</td><td>59.6</td><td>0.1 02</td><td>2.6</td><td>1 . 1 20</td><td>3.674</td><td>1 . 1 36</td><td>3.726</td><td>37</td></tr><tr><td>91/2</td><td>65</td><td>2.992</td><td>76.0</td><td>2.961</td><td>75.2</td><td>0.114</td><td>2.9</td><td>1 .585</td><td>5.1 99</td><td>1 .608</td><td>5.275</td><td>37</td></tr><tr><td>3</td><td>80</td><td>3.492</td><td>88.7</td><td>3.461</td><td>87.9</td><td>0.114</td><td>2.9</td><td>1 .861</td><td>6.1 07</td><td>1 .887</td><td>6.191</td><td>1 9</td></tr><tr><td>4</td><td>1 00</td><td>4.484</td><td>113.9</td><td>4.449</td><td>113.0</td><td>0.098</td><td>2.5</td><td>2.086</td><td>6.843</td><td>-</td><td>-</td><td>1 9</td></tr><tr><td>4</td><td>1 00</td><td>4.434</td><td>113.9</td><td>4.449</td><td>113.0</td><td>0.1 26</td><td>3.2</td><td>2.653</td><td>8.704</td><td>2.687</td><td>8.815</td><td>1 9</td></tr><tr><td rowspan="10">Nhẹ(L)</td><td>3/8</td><td>1 0</td><td>0.673</td><td>17.1</td><td>0.657</td><td>1 6.7</td><td>0.071</td><td>1 .8</td><td>0.204</td><td>0.670</td><td>0.206</td><td>0.676</td><td>217</td></tr><tr><td>1 /2</td><td>1 5</td><td>0.843</td><td>21.4</td><td>0.827</td><td>21.0</td><td>0.079</td><td>2.0</td><td>0.289</td><td>0.947</td><td>0.291</td><td>0.956</td><td>217</td></tr><tr><td>3/4</td><td>20</td><td>1 .059</td><td>26.9</td><td>1 .039</td><td>26.4</td><td>0.091</td><td>2.3</td><td>0.422</td><td>1 .384</td><td>0.424</td><td>1 .390</td><td>1 27</td></tr><tr><td>1</td><td>25</td><td>1 .331</td><td>33.8</td><td>1 .307</td><td>33.2</td><td>0.1 02</td><td>2.6</td><td>0.604</td><td>1 .981</td><td>0.610</td><td>2.000</td><td>91</td></tr><tr><td>-| 1/*4</td><td>32</td><td>1 .673</td><td>42.5</td><td>1 .650</td><td>41.9</td><td>0.1 02</td><td>2.6</td><td>0.774</td><td>2.539</td><td>0.783</td><td>2.570</td><td>61</td></tr><tr><td>-11/2</td><td>40</td><td>1 .906</td><td>48.4</td><td>1 .882</td><td>47.8</td><td>0.114</td><td>2.9</td><td>0.985</td><td>3.232</td><td>0.997</td><td>3.270</td><td>61</td></tr><tr><td>2</td><td>50</td><td>2.370</td><td>60.2</td><td>2.346</td><td>59.6</td><td>0.114</td><td>2.9</td><td>1 .242</td><td>4.076</td><td>1 .265</td><td>4.1 50</td><td>37</td></tr><tr><td>^&gt;1/2</td><td>65</td><td>2.992</td><td>76.0</td><td>2.961</td><td>75.2</td><td>0.1 26</td><td>3.2</td><td>1 .741</td><td>5.71 3</td><td>1 .777</td><td>5.830</td><td>37</td></tr><tr><td>3</td><td>80</td><td>3.492</td><td>88.7</td><td>3.461</td><td>87.9</td><td>0.1 26</td><td>3.2</td><td>2.047</td><td>6.71 5</td><td>2.1 00</td><td>6.890</td><td>1 9</td></tr><tr><td>4</td><td>1 00</td><td>4.484</td><td>113.9</td><td>4.449</td><td>113.0</td><td>0.1 42</td><td>3.6</td><td>2.974</td><td>9.756</td><td>3.048</td><td>1 0.000</td><td>1 9</td></tr><tr><td rowspan="12">Trung Bình([Y/l)</td><td>3/8</td><td>1 0</td><td>0.685</td><td>17.4</td><td>0.661</td><td>16.8</td><td>0.091</td><td>2.3</td><td>0.256</td><td>0.839</td><td>0.258</td><td>0.845</td><td>2 17</td></tr><tr><td>1 /2</td><td>1 5</td><td>0.854</td><td>21.7</td><td>0.831</td><td>21.1</td><td>0.1 02</td><td>2.6</td><td>0.367</td><td>1 .205</td><td>0.372</td><td>1 .220</td><td>2 17</td></tr><tr><td>3/4</td><td>20</td><td>1 .071</td><td>27.2</td><td>1 .047</td><td>26.6</td><td>0.1 02</td><td>2.6</td><td>0.475</td><td>1 .558</td><td>0.479</td><td>1 .570</td><td>1 27</td></tr><tr><td>1</td><td>25</td><td>1 .346</td><td>34.2</td><td>1.315</td><td>33.4</td><td>0. 1 26</td><td>3.2</td><td>0.736</td><td>2.415</td><td>0.741</td><td>2.430</td><td>91</td></tr><tr><td>-Ị 1/4</td><td>32</td><td>1 .689</td><td>42.9</td><td>1 .657</td><td>42.1</td><td>0. 1 26</td><td>3.2</td><td>0.945</td><td>3.101</td><td>0.954</td><td>3.1 30</td><td>61</td></tr><tr><td>'ị 1/2</td><td>40</td><td>1 .921</td><td>48.8</td><td>1 .890</td><td>48.0</td><td>0.1 26</td><td>3.2</td><td>1 .087</td><td>3.567</td><td>1 . 1 00</td><td>3.61 0</td><td>61</td></tr><tr><td>2</td><td>50</td><td>2.394</td><td>60.8</td><td>2.354</td><td>59.8</td><td>0.1 42</td><td>3.6</td><td>1 .534</td><td>5.034</td><td>1 .554</td><td>5.1 00</td><td>37</td></tr><tr><td>91/2</td><td>65</td><td>3.016</td><td>76.6</td><td>2.969</td><td>75.4</td><td>0. 1 42</td><td>3.6</td><td>1 .959</td><td>6.427</td><td>1 .996</td><td>6.550</td><td>37</td></tr><tr><td>3</td><td>80</td><td>3.524</td><td>89.5</td><td>3.469</td><td>88.1</td><td>0. 1 57</td><td>4.0</td><td>2.550</td><td>8.365</td><td>2.603</td><td>8.540</td><td>1 9</td></tr><tr><td>4</td><td>1 00</td><td>4.524</td><td>114.9</td><td>4.461</td><td>113.3</td><td>0.1 77</td><td>4.5</td><td>3.707</td><td>12.1 62</td><td>3.810</td><td>1 2.500</td><td>1 9</td></tr><tr><td>5</td><td>1 25</td><td>5.535</td><td>1 40.6</td><td>5.461</td><td>1 38.7</td><td>0. 1 97</td><td>5.0</td><td>5.062</td><td>1 6.609</td><td>5.21 2</td><td>17.1 00</td><td>7</td></tr><tr><td>6</td><td>1 50</td><td>6.539</td><td>1 66.1</td><td>6.461</td><td>1 64.1</td><td>0. 1 97</td><td>5.0</td><td>6.017</td><td>1 9.740</td><td>6.1 87</td><td>20.300</td><td>7</td></tr><tr><td rowspan="12">Nặng(H)</td><td>3/8</td><td>1 0</td><td>0.685</td><td>17.4</td><td>0.661</td><td>16.8</td><td>0.114</td><td>2.9</td><td>0.309</td><td>1.015</td><td>0.314</td><td>1 .030</td><td>2 17</td></tr><tr><td>1 /2</td><td>1 5</td><td>0.854</td><td>21.7</td><td>0.831</td><td>21.1</td><td>0.1 26</td><td>3.2</td><td>0.438</td><td>1 .436</td><td>0.442</td><td>1 .450</td><td>2 17</td></tr><tr><td>3/4</td><td>20</td><td>1 .071</td><td>27.2</td><td>1 .047</td><td>26.6</td><td>0.1 26</td><td>3.2</td><td>0.570</td><td>1 .870</td><td>0.573</td><td>1 .880</td><td>1 27</td></tr><tr><td>1</td><td>25</td><td>1 .346</td><td>34.2</td><td>1.315</td><td>33.4</td><td>0. 1 57</td><td>4.0</td><td>0.896</td><td>2.939</td><td>0.902</td><td>2.960</td><td>91</td></tr><tr><td>'Ị 1/4</td><td>32</td><td>1 .689</td><td>42.9</td><td>1 .657</td><td>42.1</td><td>0.1 57</td><td>4.0</td><td>1 . 1 58</td><td>3.798</td><td>1 . 1 67</td><td>3.830</td><td>61</td></tr><tr><td>-| 1/2</td><td>40</td><td>1 .921</td><td>48.8</td><td>1 .890</td><td>48.0</td><td>0.1 57</td><td>4.0</td><td>1 .335</td><td>4.380</td><td>1 .347</td><td>4.420</td><td>61</td></tr><tr><td>2</td><td>50</td><td>2.394</td><td>60.8</td><td>2.354</td><td>59.8</td><td>0. 1 77</td><td>4.5</td><td>1 .887</td><td>6.1 92</td><td>1 .908</td><td>6.260</td><td>37</td></tr><tr><td>2 <sup>1/2</sup></td><td>65</td><td>3.016</td><td>76.6</td><td>2.969</td><td>75.4</td><td>0. 1 77</td><td>4.5</td><td>2.41 8</td><td>7.934</td><td>2.454</td><td>8.050</td><td>37</td></tr><tr><td>3</td><td>80</td><td>3.524</td><td>89.5</td><td>3.469</td><td>88.1</td><td>0.1 97</td><td>5.0</td><td>3.1 49</td><td>1 0.333</td><td>3.200</td><td>1 0.500</td><td>1 9</td></tr><tr><td>4</td><td>1 00</td><td>4.524</td><td>114.9</td><td>4.461</td><td>113.3</td><td>0.21 3</td><td>5.4</td><td>4.412</td><td>1 4.475</td><td>4.511</td><td>14.800</td><td>1 9</td></tr><tr><td>5</td><td>1 25</td><td>5.535</td><td>1 40.6</td><td>5.461</td><td>1 38.7</td><td>0.21 3</td><td>5.4</td><td>5.451</td><td>1 7.884</td><td>5.608</td><td>1 8.400</td><td>7</td></tr><tr><td>6</td><td>1 50</td><td>6.539</td><td>1 66.1</td><td>6.461</td><td>1 64.1</td><td>0.21 3</td><td>5.4</td><td>6.482</td><td>2 1 .266</td><td>6.675</td><td>2 1 .900</td><td>7</td></tr><tr><td colspan="8">— cấp độ siêu nhẹ và nhẹ -8%; + không qui định)</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td colspan="9">— Cấp độ trung binh và nặng - 10% + không qui định</td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table><h2>3. Bảng tiêu chuẩn ống thép không gỉ</h2><table><colgroup><col><col><col><col><col><col><col><col><col><col><col><col></colgroup><tbody><tr><td colspan="4">OD</td><td colspan="2">SCHSS</td><td colspan="2">SCHIOS</td><td colspan="2">SCH20S</td><td colspan="2">SCH40S</td></tr><tr><td> </td><td> </td><td>ASTM</td><td>JIS</td><td>ASTM</td><td>JIS</td><td>ASTM</td><td>JIS</td><td>ASTM</td><td>JIS</td><td>ASTM</td><td>JIS</td></tr><tr><td>DN</td><td>(Inch)</td><td>(ntnt)</td><td>(mnt)</td><td>ịmm)</td><td>(mm)</td><td>(ntnt)</td><td>(mm)</td><td>(mm)</td><td>(mm)</td><td>(mm)</td><td>ịmm)</td></tr><tr><td>8</td><td>1/4</td><td>13,72</td><td>13,8</td><td>-</td><td>1,2</td><td>-</td><td>1,65</td><td>-</td><td>2,0</td><td>2 24</td><td>2,2</td></tr><tr><td>10</td><td>3/8</td><td>17,15</td><td>17,3</td><td>-</td><td>1,2</td><td>-</td><td>1,65</td><td>-</td><td>2,0</td><td>2,31</td><td>2,3</td></tr><tr><td>15</td><td>1/2</td><td>21,34</td><td>21,7</td><td>1,65</td><td>1,65</td><td>2,11</td><td>2,1</td><td>-</td><td>2,5</td><td>2,77</td><td>2,8</td></tr><tr><td>20</td><td>3/4</td><td>26,67</td><td>27,2</td><td>1,65</td><td>1,65</td><td>2,11</td><td>2,1</td><td>-</td><td>2,5</td><td>2,87</td><td>2,9</td></tr><tr><td>25</td><td>1</td><td>33,40</td><td>34,0</td><td>1,65</td><td>1,65</td><td>2,77</td><td>2,8</td><td>-</td><td>3,0</td><td>3,38</td><td>3,4</td></tr><tr><td>32</td><td>1 1/4</td><td>42,16</td><td>42,7</td><td>1,65</td><td>1,65</td><td>2,77</td><td>2,8</td><td>-</td><td>3,0</td><td>3,56</td><td>3,6</td></tr><tr><td>40</td><td>1 1/2</td><td>48,26</td><td>48.6</td><td>1,65</td><td>1,65</td><td>2,77</td><td>2,8</td><td>-</td><td>3,0</td><td>3,68</td><td>3,7</td></tr><tr><td>50</td><td>2</td><td>60,33</td><td>60,5</td><td>1,65</td><td>1,65</td><td>2,77</td><td>2,8</td><td>-</td><td>3,5</td><td>3,91</td><td>3,9</td></tr><tr><td>65</td><td>2 1/2</td><td>73,03</td><td>76,3</td><td>2,11</td><td>2,1</td><td>3,05</td><td>3,0</td><td>-</td><td>3,5</td><td>5,16</td><td>5,2</td></tr><tr><td>80</td><td>3</td><td>88,90</td><td>89,1</td><td>2,11</td><td>2,1</td><td>3,05</td><td>3,0</td><td>-</td><td>4,0</td><td>5,49</td><td>5,5</td></tr><tr><td>90</td><td>3 1/2</td><td>101,60</td><td>101,6</td><td>2,11</td><td>2,1</td><td>3,05</td><td>3,0</td><td>-</td><td>4,0</td><td>5,72</td><td>5,7</td></tr><tr><td>100</td><td>4</td><td>11430</td><td>1143</td><td>2,11</td><td>2,1</td><td>3,05</td><td>3,0</td><td>-</td><td>4,0</td><td>6,02</td><td>6,0</td></tr><tr><td>125</td><td>5</td><td>141,30</td><td>139,8</td><td>2,77</td><td>2,8</td><td>3,4</td><td>3,4</td><td>-</td><td>5,0</td><td>6,55</td><td>6,6</td></tr><tr><td>150</td><td>6</td><td>168,28</td><td>165,2</td><td>2,77</td><td>2,8</td><td>3,4</td><td>3,4</td><td>-</td><td>5,0</td><td>7,11</td><td>7,1</td></tr><tr><td>200</td><td>8</td><td>219,08</td><td>216,3</td><td>2,77</td><td>2,8</td><td>3,76</td><td>4,0</td><td>-</td><td>6,5</td><td>8,18</td><td>8,2</td></tr><tr><td>250</td><td>10</td><td>273.05</td><td>267,4</td><td>3,4</td><td>3,4</td><td>4.19</td><td>4,0</td><td>-</td><td>6,5</td><td>9,27</td><td>9,3</td></tr><tr><td>300</td><td>12</td><td>323,85</td><td>318,5</td><td>3,96</td><td>4,0</td><td>4,57</td><td>4,3</td><td>-</td><td>6,5</td><td>9,52</td><td>10,3</td></tr><tr><td>350</td><td>14</td><td>355.6</td><td>355.6</td><td>3,96</td><td>4,0</td><td>4,78</td><td>5,0</td><td>-</td><td>8,0</td><td>-</td><td>11,1</td></tr><tr><td>400</td><td>16</td><td>406.4</td><td>406.4</td><td>4,19</td><td>4,5</td><td>4,78</td><td>5,0</td><td>-</td><td>8,0</td><td>-</td><td>12,7</td></tr><tr><td>450</td><td>18</td><td>457.2</td><td>457.2</td><td>4,19</td><td>4,5</td><td>4,78</td><td>5,0</td><td>-</td><td>8,0</td><td>-</td><td>14,3</td></tr><tr><td>500</td><td>20</td><td>508</td><td>508</td><td>4,78</td><td>5,0</td><td>5,54</td><td>5,5</td><td>-</td><td>9,5</td><td>-</td><td>15,1</td></tr></tbody></table>

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