根据2.1、2.2和2.3节中的公式计算出来在指定温度时的标准磅级和特殊磅级的工作压力,数值见表-4和表5。
表-4 温度T时标准磅级的承载压力(BAR)
| 磅级 | 温度 ℃ | |||||||
| 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | |
| 150 | 17.7 | 15.8 | 14 | 12.1 | 10.2 | 8.4 | 6.5 | 4.7 |
| 300 | 86.8 | 84.8 | 82.7 | 80.6 | 78.6 | 76.7 | 70.6 | 62.5 |
| 600 | 173.6 | 169.5 | 165.4 | 161.3 | 157.2 | 153.5 | 141.1 | 125 |
| 800 | 231.5 | 226 | 220.6 | 215 | 209.6 | 204.6 | 188.2 | 166.8 |
| 900 | 260.4 | 254.3 | 248.1 | 241.9 | 235.8 | 230.2 | 211.7 | 187.6 |
| 1500 | 434 | 423.8 | 413.5 | 403.2 | 393 | 383.7 | 352.8 | 312.7 |
| 1700 | 491.9 | 480.3 | 468.6 | 457 | 445.3 | 434.8 | 399.8 | 354.4 |
| 2500 | 723.5 | 706.3 | 689.1 | 672 | 654.9 | 639.4 | 588 | 521.1 |
| 2700 | 781.4 | 762.8 | 744.2 | 725.8 | 707.3 | 690.6 | 635 | 562.8 |
| 3000 | 868.2 | 847.5 | 827 | 806.4 | 785.8 | 767.3 | 705.6 | 625.4 |
| 3500 | 1012.9 | 988.8 | 964.8 | 940.8 | 916.8 | 895.2 | 823.2 | 729.6 |
| 4500 | 1302.3 | 1271.3 | 1240.5 | 1209.6 | 1178.7 | 1151 | 1058.4 | 938 |
表-5 温度T时特殊磅级的承载压力(BAR)
| 磅级 | 温度 ℃ | |||||||
| 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | |
| 150 | 34.7 | 33.8 | 33 | 32.2 | 31.4 | 30.6 | 28.2 | 25 |
| 300 | 90.4 | 88.3 | 86.1 | 84 | 81.9 | 80 | 73.5 | 65.1 |
| 600 | 180.9 | 176.6 | 172.3 | 168 | 163.7 | 160 | 147 | 130.3 |
| 800 | 241.1 | 135.4 | 229.7 | 224 | 218.3 | 213.1 | 196 | 173.7 |
| 900 | 271.3 | 264.9 | 258.4 | 252 | 245.6 | 239.8 | 220.5 | 195.4 |
| 1500 | 452.1 | 441.4 | 430.7 | 420 | 409.3 | 399.6 | 367.5 | 325.7 |
| 1700 | 512.4 | 500.3 | 488.1 | 476 | 463.9 | 452.9 | 416.5 | 369.1 |
| 2500 | 753.6 | 735.7 | 717.9 | 700 | 612.1 | 666 | 612.5 | 542.9 |
| 2700 | 813.9 | 794.6 | 775.3 | 756 | 736.7 | 719.4 | 661.5 | 586.3 |
| 3000 | 904.3 | 882.9 | 861.4 | 840 | 818.6 | 799.3 | 735 | 651.4 |
| 3500 | 1055 | 1030 | 1005 | 980 | 955 | 932.5 | 857.5 | 760 |
| 4500 | 1356.4 | 1324.3 | 1292.1 | 1260 | 1227.9 | 1199 | 1102.5 | 977.1 |
第2.1、2.2和2.3节中的公式计算值应小于等于相应的最大允许压力值。则根据表-2和表-4得表-6,根据表-3和表5可得表-7。
表-6 标准磅级压力温度额定值Pst(BAR)
| 磅级 | 温度 ℃ | |||||||
| 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | |
| 150 | 17.7 | 15.8 | 13.8 | 12.1 | 10.2 | 8.4 | 6.5 | 4.6 |
| 300 | 51.5 | 50.3 | 48.6 | 46.3 | 42.9 | 40.3 | 36.5 | 33.7 |
| 600 | 103.0 | 100.3 | 97.2 | 92.7 | 85.7 | 80.4 | 73.3 | 67.7 |
| 800 | 137.4 | 133.8 | 129.6 | 123.6 | 114.3 | 107.3 | 97.6 | 90.2 |
| 900 | 154.6 | 150.6 | 145.8 | 139.0 | 128.6 | 120.7 | 109.8 | 101.4 |
| 1500 | 257.6 | 250.8 | 243.4 | 231.8 | 214.4 | 201.1 | 183.1 | 169.0 |
| 1700 | 292 | 284.3 | 275.8 | 262.7 | 242.9 | 227.9 | 207.5 | 191.6 |
| 2500 | 429.4 | 418.2 | 405.4 | 386.2 | 357.1 | 335.3 | 304.9 | 281.8 |
| 2700 | 463.8 | 451.7 | 437.8 | 417 | 385.7 | 362.1 | 329.3 | 304.3 |
| 3000 | 515.3 | 501.9 | 486.5 | 463.4 | 428.5 | 402.3 | 365.8 | 348.5 |
| 3500 | 601.2 | 585.5 | 567.6 | 540.5 | 499.9 | 469.3 | 426.7 | 394.4 |
| 4500 | 773.0 | 752.8 | 729.8 | 694.8 | 642.6 | 603.3 | 548.5 | 507 |
表-7 WB36特殊磅级压力温度额定值Psp(BAR)
| 磅级 | 温度 ℃ | |||||||
| 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | |
| 150 | 20.0 | 20.0 | 20.0 | 20.0 | 20.0 | 19.8 | 19.3 | 18.1 |
| 300 | 51.7 | 51.7 | 51.7 | 51.7 | 51.7 | 51.5 | 50.3 | 47.3 |
| 600 | 103.4 | 103.4 | 103.4 | 103.4 | 103.4 | 102.8 | 100.6 | 94.4 |
| 800 | 137.9 | 137.9 | 137.9 | 137.9 | 137.9 | 137.1 | 133.9 | 125.7 |
| 900 | 155.1 | 155.1 | 155.1 | 155.1 | 155.1 | 154.3 | 150.6 | 141.4 |
| 1500 | 258.6 | 258.6 | 258.6 | 258.6 | 258.6 | 257.1 | 251.2 | 235.8 |
| 1700 | 293 | 293 | 293 | 293 | 293 | 291.4 | 284.6 | 267.3 |
| 2500 | 430.9 | 430.9 | 430.9 | 430.9 | 430.9 | 428.6 | 418.3 | 393.1 |
| 2700 | 465.4 | 465.4 | 465.4 | 465.4 | 465.4 | 462.9 | 451.8 | 424.6 |
| 3000 | 517.1 | 517.1 | 517.1 | 517.1 | 517.1 | 514.3 | 502 | 471.7 |
| 3500 | 603.3 | 603.3 | 603.3 | 603.3 | 603.3 | 600 | 585.8 | 550.4 |
| 4500 | 775.7 | 775.7 | 775.7 | 775.7 | 775.7 | 771.4 | 753.2 | 707.6 |
经过以上计算,我们可以看出在温度T时的计算压力值是选用压力值的两倍左右,说明按照ASME B16.34的标准选用压力值有2倍的安全系数。另外,有了WB36材料的压力温度额定值,就可以根据工况的压力和温度确定阀门的磅级,然后根据流道直径选择阀门壁厚。从而使得WB36材料阀门按照ASME B16.34标准设计时,同其他材料一样查表即可。

(来源:中国泵阀第一网)
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