**层:聚氨酯发泡保温钢管工作层
根据设计和客户的要求一般选用无缝管(GB8163-87)螺旋焊管(GB9711-88;SY/T5038-92)和直缝焊管(GB3092-93)。钢管表面经过先进的抛丸除锈工艺处理后,钢管除锈等级可达GB8923-1988标准中的Sa2级,表面粗糙度可达GB6060.5-88标准中R=12.5微米。
第二层:聚氨酯发泡保温钢管保温层
用高压发泡机在钢管于外护层之间形成的空腔中一次性注入硬质聚氨酯泡沫塑料原液而成。即俗称的“管中管发泡工艺”。其作用一是防水,二是保温,三是支撑热网自重。当输送介质温度为:-50℃—120℃时,选用硬质聚氨基脲酸酯泡沫塑料做保温层。
第三层:聚氨酯发泡保温钢管高密度聚乙烯保护层
预制成一定壁厚的黑色(黄色)塑料管材,其作用一是保护聚氨酯保温层免遭机械硬物破坏,二是防腐防水。
在中、小口径的热输原油或供暖管道上,为了减少管道向土壤散热,在管道外部加上保温复合层。常用的保温材料是硬质聚氨脂泡沫塑料,适用温度为-185~120℃。这种材料质地松软,为提高其强度,在隔热层外面加敷一层高密度聚乙烯层,形成复合材料结构,以防止地下水渗入保温层内。
利用高压成套聚氨酯发泡设备对钢管外表面进行抛丸除锈处理和外护管内表面电晕处理工艺,提高保温管的粘接性能。保温层材料为密度60kg/m3至80kg/m3的硬质聚氨酯泡沫,充分添满钢管与套管之间的间隙,并具有一定的粘接强度,使钢管、外套管及保温层三者之间形成一个牢固的整体。聚氨酯泡沫具有良好的机械性能和绝热性能,通常情况下可耐温120℃,通过改性或与其它隔热材料组合可耐温180℃。
聚氨酯发泡保温钢管广泛用于液体、气体的输送管网,化工管道保温工程石油、化工、集中供热热网、中央空调通风管道、市政工程等。高温预制直埋保温管是一种保温性能好,加安全可靠,工程造价低的直埋预制保温管。有效的解决了城镇集中供热中130℃−600℃高温输热用预制直埋保温管的保温、滑动润滑和裸露管端的防水问题。高温预制直埋保温管不仅具有传统地沟和架空敷设管道难以比拟的先进技术、实用性能,而且还具有显著的社会效益和经济效益,也是供热节能的有力措施。高温预制直埋保温管采用直埋供热管道技术,标志着中国供热管道技术发展已经进入了新的起点。
外径mm | 标 准 型 | 薄壁型 | 对应钢管外径mm | 对应保温层厚度mm | 对应套袖mm | ||||
壁厚mm | 重量Kg | 允许偏差mm | 壁厚mm | 重量Kg | 允许偏差mm | ||||
92 | 2.5 | 0.675 | ±0.23 | 2.0 | 0.543 | ±0.2 | 27 34? | 30 27 | 110 |
100 | 2.5 | 0.735 | ±0.23 | 2.0 | 0.591 | ±0.2 | 34 | 31 | 110 |
110 | 2.5 | 0.811 | ±0.23 | 2.0 | 0.651 | ±0.2 | 48 | 29 | 121 |
121 | 2.5 | 0.893 | ±0.23 | 2.0 | 0.718 | ±0.2 | 57 | 30 | 125 |
125 | 2.5 | 0.924 | ±0.23 | 2.0 | 0.742 | ±0.2 | 57 60 | 31 30 | 133 |
133 | 2.5 | 0.984 | ±0.23 | 2.0 | 0.790 | ±0.2 | 57 60 | 36 34 | 142 |
142 | 3 | 1.258 | ±0.25 | 2.0 | 0.844 | ±0.2 | 76 | 31 | 155 |
150 | 3 | 1.330 | ±0.25 | 2.0 | 0.893 | ±0.2 | 76 | 35 | 165 |
155 | 3 | 1.375 | ±0.25 | 2.0 | 0.923 | ±0.2 | 89 | 31 | 165 |
161 | 3 | 1.430 | ±0.25 | 2.0 | 0.959 | ±0.2 | 89 | 34 | 175 |
165 | 3 | 1.466 | ±0.25 | 2.0 | 0.983 | ±0.2 | 89 | 36 | 175 |
171 | 3 | 1.520 | ±0.25 | 2.0 | 1.019 | ±0.2 | 89 | 39 | 180 |
175 | 3 | 1.556 | ±0.25 | 2.0 | 1.044 | ±0.2 | 108 | 31 | 180 |
180 | 3 | 1.601 | ±0.25 | 2.0 | 1.074 | ±0.2 | 108? 114 | 33 31 | 188 |
188 | 3 | 1.674 | ±0.25 | 2.0 | 1.122 | ±0.2 | 114 | 35 | 200 |
194 | 3 | 1.728 | ±0.25 | 2.0 | 1.158 | ±0.2 | 108 | 41 | 200 |
200 | 3.2 | 1.899 | ±0.26 | 2.2 | 1.312 | ±0.21 | 133 | 31 | 211 |
208 | 3.2 | 1.977 | ±0.26 | 2.2 | 1.365 | ±0.21 | 133 | 35 | 219 |
211 | 3.2 | 2.005 | ±0.26 | 2.2 | 1.385 | ±0.21 | 133 | 31 | 219 |
219 | 3.2 | 2.083 | ±0.26 | 2.2 | 1.438 | ±0.21 | 133 | 40.8 | 225 |
225 | 3.5 | 2.338 | ±0.28 | 2.5 | 1.678 | ±0.23 | 140 159 | 40 30 | 238 |
230 | 3.5 | 2.391 | ±0.28 | 2.5 | 1.715 | ±0.23 | 165 | 30 | 238 |
238 | 3.5 | 2.475 | ±0.28 | 2.5 | 1.776 | ±0.23 | 159 | 37 | 245 |
245 | 3.5 | 2.549 | ±0.28 | 2.5 | 1.828 | ±0.23 | 159 | 39 | 265 |
250 | 3.9 | 2.894 | ±0.30 | 2.5 | 1.866 | ±0.23 | 159 | 43 | 265 |
265 | 3.9 | 3.071 | ±0.30 | 2.5 | 1.979 | ±0.23 | 165 | 47 | 285 |
280 | 4.4 | 3.657 | ±0.32 | 3.0 | 2.506 | ±0.25 | 165 | 53 | 290 |
285 | 4.4 | 3.724 | ±0.32 | 3.0 | 2.551 | ±0.25 | 219 | 30 | 290 |
290 | 4.4 | 3.790 | ±0.32 | 3.0 | 2.597 | ±0.25 | 219 | 32 | 302 |
300 | 4.4 | 3.923 | ±0.32 | 3.0 | 2.687 | ±0.25 | 219 | 37 | 310 |
305 | 4.4 | 3.989 | ±0.32 | 3.0 | 2.732 | ±0.25 | 219 | 40 | 310 |
310 | 4.4 | 4.055 | ±0.32 | 3.0 | 2.778 | ±0.25 | 219 | 42 | 327 |
315 | 4.9 | 4.583 | ±0.35 | 3.5 | 3.288 | ±0.27 | 219 | 44 | 327 |
325 | 4.9 | 4.730 | ±0.35 | 3.5 | 3.394 | ±0.27 | 219 | 49.5 | 335 |
327 | 4.9 | 4.760 | ±0.35 | 3.5 | 3.415 | ±0.27 | 219 | 50 | 345 |
335 | 4.9 | 4.878 | ±0.35 | 3.5 | 3.499 | ±0.27 | 219 | 54 | 345 |
345 | 4.9 | 5.026 | ±0.35 | 3.5 | 3.605 | ±0.27 | 273 | 32 | 365 |
355 | 4.9 | 5.174 | ±0.35 | 3.5 | 3.710 | ±0.27 | 273 | 37 | 365 |
361 | 5.6 | 6.002 | ±0.38 | 4.0 | 4.307 | ±0.3 | 273 | 40 | 385 |
365 | 5.6 | 6.070 | ±0.38 | 4.0 | 4.355 | ±0.3 | 273 | 42 | 385 |
381 | 5.6 | 6.340 | ±0.38 | 4.0 | 4.548 | ±0.3 | 273 | 40 | 440 |
385 | 5.6 | 6.408 | ±0.38 | 4.0 | 1.596 | ±0.3 | 273 | 52 | 440 |
400 | 6.3 | 7.480 | ±0.57 | 5.0 | 5.956 | ±0.47 | 325 | 32 | 417 |
407 | 6.3 | 7.613 | ±0.57 | 5.0 | 6.062 | ±0.47 | 325 | 35 | 420 |
417 | 6.3 | 7.803 | ±0.57 | 5.0 | 6.213 | ±0.47 | 325 | 41 | 439 |
420 | 7.0 | 8.719 | ±0.63 | 5.0 | 6.258 | ±0.47 | 325 | 42 | 439 |
433 | 7.0 | 8.994 | ±0.63 | 5.0 | 6.454 | ±0.47 | 325 | 49 | 450 |
439 | 7.0 | 9.120 | ±0.63 | 5.0 | 6.544 | ±0.47 | 325 | 52 | 450 |
450 | 7.0 | 9.352 | ±0.63 | 5.0 | 6.710 | ±0.47 | 377 | 31 | 464 |
464 | 7.0 | 9.648 | ±0.63 | 5.0 | 6.922 | ±0.47 | 377 | 31 | 470 |
470 | 7.0 | 9.775 | ±0.63 | 5.0 | 7.012 | ±0.47 | 377 | 41 | 500 |
475 | 7.0 | 9.880 | ±0.63 | 5.0 | 7.087 | ±0.47 | 377 | 44 | 500 |
485 | 7.0 | 10.091 | ±0.63 | 5.0 | 7.238 | ±0.47 | 377 | 40 | 500 |
490 | 7.0 | 10.197 | ±0.63 | 5.0 | 7.314 | ±0.47 | 377 | 51 | 500 |
500 | 7.8 | 11.579 | ±0.69 | 6.0 | 7.939 | ±0.55 | 377 | 55 | 520 |
520 | 7.8 | 12.049 | ±0.69 | 6.0 | 9.301 | ±0.55 | 426 | 41 | 525 |
525 | 7.8 | 12.166 | ±0.69 | 6.0 | 9.392 | ±0.55 | 426 | 43 | 535 |
530 | 7.8 | 12.284 | ±0.69 | 6.0 | 9.482 | ±0.55 | 426 | 46 | 550 |
535 | 7.8 | 12.402 | ±0.69 | 6.0 | 9.572 | ±0.55 | 426 | 48 | 550 |
550 | 8.8 | 14.363 | ±0.76 | 6.5 | 10.655 | ±0.58 | 426 | 55 | 568 |
568 | 8.8 | 14.841 | ±0.76 | 6.5 | 11.077 | ±0.58 | 478 | 40 | 600 |
580 | 8.8 | 15.195 | ±0.76 | 6.5 | 11.243 | ±0.58 | 478 | 44 | 600 |
590 | 8.8 | 15.425 | ±0.76 | 6.5 | 11.439 | ±0.58 | 478 | 50 | 630 |
600 | 8.8 | 15.690 | ±0.76 | 6.5 | 11.635 | ±0.58 | 478 | 54 | 655 |
622 | 8.8 | 16.274 | ±0.76 | 6.5 | 12.066 | ±0.58 | 478 | 65.5 | 655 |
630 | 9.8 | 18.331 | ±0.84 | 8.0 | 15.077 | ±0.70 | 529 | 42 | 655 |
641 | 9.8 | 18.656 | ±0.84 | 8.0 | 15.273 | ±0.70 | 529 | 48 | 655 |
655 | 9.8 | 19.069 | ±0.84 | 8.0 | 15.610 | ±0.70 | 529 | 55 | 685 |
685 | 9.8 | 19.965 | ±0.84 | 8.0 | 16.334 | ±0.70 | 529 | 70 | 710 |
700 | 9.8 | 20.695 | ±0.84 | 8.0 | 16.937 | ±0.70 | 529 | 80 | 733 |
733 | 11.1 | 24.167 | ±0.93 | 8.0 | 17.492 | ±0.70 | 630 | 43 | 760 |
740 | 11.1 | 24.401 | ±0.93 | 8.0 | 17.661 | ±0.70 | 630 | 47 | 760 |
746 | 11.1 | 24.602 | ±0.93 | 8.0 | 17.806 | ±0.70 | 630 | 50 | 760 |
750 | 11.1 | 24.736 | ±0.93 | 8.0 | 17.903 | ±0.70 | 630 | 52 | 777 |
760 | 11.1 | 25.071 | ±0.93 | 8.0 | 18.144 | ±0.70 | 630 | 57 | 777 |
777 | 11.1 | 25.640 | ±0.93 | 8.0 | 18.554 | ±0.70 | 630 | 65.5 | 795 |
795 | 11.1 | 26.212 | ±0.93 | 8.0 | 18.988 | ±0.70 | 630 | 74 | 830 |
830 | 11.1 | 27.414 | ±0.93 | 8.0 | 19.833 | ±0.70 | 720 | 47 | 850 |
850 | 12 | 30.328 | ±1.0 | 9.0 | 22.828 | ±0.77 | 720 | 56 | 885 |
885 | 12 | 31.595 | ±1.0 | 9.0 | 23.77 | ±0.77 | 720 | 73 | - |
911 | 12 | 33.730 | ±1.0 | 9.0 | 25.379 | ±0.77 | 820 | 53 | 988 |
988 | 12 | 35.232 | ±1.0 | 9.0 | 26.573 | ±0.77 | 820 | 75 | 1054 |
1044 | 14 | 43.490 | ±1.15 | 10 | 31.185 | ±0.85 | 920 | 48 | - |
1054 | 14 | 43.912 | ±1.15 | 10 | 31.486 | ±0.85 | 920 | 57 | 1095 |
1095 | 14 | 45.643 | ±1.15 | 10 | 32.732 | ±0.85 | 920 | 77 | - |
1155 | 14 | 48.477 | ±1.15 | 10 | 34.532 | ±0.85 | 1020 | 57 | 1210 |
1192 | 14 | 49.739 | ±1.15 | 10 | 35.648 | ±0.85 | 1020 | 72 | - |
1210 | 14 | 50.499 | ±1.15 | 10 | 36.191 | ±0.85 | 1020 | 95 | - |
1380 | 14 | 57.677 | ±1.15 | 10 | 41.318 | ±0.85 | 1220 | 70 | 1430 |