5.微粒在直管中的运动管道和部件的内表面在制造、加工、存放和准备组装的过程中会被杂质污染.若在组装前不去掉散落或粘在内表面上的杂质,杂质将被带入系统.除了有粘性的微粒之外,这些污染物将以自由游离的状态存积在管道或部件的下表面上. 无论是游离的还是粘于表面的污染杂质微粒, 5. Movement of Particles in Straight Tubes The internal surfaces of pipes and components are contaminated with impurities during manufacture, processing, storage and preparation for assembly. If the impurities scattered or adhered to the inner surface are not removed prior to assembly, the impurities Are brought into the system.In addition to the sticky particles, these pollutants will be stored in a freely free state on the lower surface of the pipe or component.No matter is the free or sticky contamination particles on the surface,