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LAIYUAN:SHANGHAISONGXIAJIANZHENQITIANJIN11XUAN5 FABUSHIJIAN:2021-03-03 15:56
空气弹簧不适合做液硫输送管线,但是很多人并不知道是什么原因,那么下面就让小编来给我们详细的介绍下。
液硫经由船运至码头,再由泵打入装置区的贮罐。为克服江水波动及趸船晃动,码头栈桥与河岸之间的液硫输送管线选用了空气弹簧。该空气弹簧使用不久即发生破裂导致液硫泄漏。为此。分析破裂原因,并同供应商及制造单位进行了交流,提出了改进意见。
设计参数为:夹套伴随内层管DN125,外层管DN200,长度为10 m,材质为3MPa。使用条件为:液硫间歇输送,内层液硫工作压力为0.6 MPa,温度为135。
对泄漏部位取样着色检查,发现泄漏部位在内层紧靠管接头的波纹管第一个波峰上,裂纹呈周向分布,裂纹内表面开口较外表面大。由此可以推断,裂纹由内向外扩展
液硫本身有一定的酸性。在装卸过程中,液硫又难免夹带少量水及氧气,氧化后呈一定的酸性,故进一步加大了液硫的酸度;另一方面,大口径空气弹簧材料在生产及加工过程中固溶处理不当,碳化物未能充分固溶,材料本身有碳化物析出,这样大大降低了304本身的耐蚀性能,在酸性条件下,首先在这些位置发生微区电化学反应,出现腐蚀。
断裂部位位于第一个波峰的上侧软硬管交界处。由于过长,断裂处曲率过大,应力集中。另外,在使用过程中,采用间隙输送液硫。不输送时,停供蒸汽,内液硫固化充满,使变成刚性管,不能吸收趸船晃动位移时产生的应力。在上述两种应力的共同作用下,空气弹簧产生了应力腐蚀而开裂。
以上就是小编给我们介绍的空气弹簧不适合做液硫输送管线的原因,如果想要了解天津11选5的资讯,可随时关注我们。
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