一、前言在粘胶长丝生产过程中,酸浴、精练浴液等都需要管道输送。目前,各厂基本上都采用传统管材,即酸浴管使用钢衬胶管、钢衬聚丙烯管或聚氯乙烯(PVC)管;精练浴液(后处理液)管使用钢衬胶管,钢衬聚丙烯管或不锈钢管。这些材料在某些场合功能价格较低,在老厂改造及新建厂时为确保投资收益率,需在某些场合选择价格低的新型材料。前几年,国内某些厂家在引进设备 First, the foreword Viscose filament yarn production process, acid bath, scouring bath, etc. need to pipeline. At present, all the plants basically use traditional pipes, that is, the acid bath pipes use steel lined rubber pipes, steel lined polypropylene pipes or polyvinyl chloride (PVC) pipes; the scouring liquid (post-treatment liquid) pipes use steel lined rubber pipes, Polypropylene or stainless steel tube. These materials have lower functional cost in some occasions. In order to ensure the return on investment during the process of rebuilding and new factory building, new material with low price should be selected in some occasions. A few years ago, some domestic manufacturers are introducing equipment