It is proved by practice that the pipeline lined with the rolling insertion method not only seldom leaks, but also suits由于这种衬里管成圆度高、摩阻系数低,并具有抗化学物质侵蚀等特点,所以经实践证明,采用聚乙烯管转动成衬的管道不但流体损失少,而且对输送颗粒物质的抗蚀性较高。