自1979年始,经在试验场及在输油管道上多次试验证明,采用聚氨酯泡沫塑料清管器对变形管道进行清管是可行的。1980年上半年,在东北2000多公里管道上进行了推广,取得了良好的效果。一、清管试验过程第一个阶段:在试验场内对变形管道进行清管器的通过能力试验。初期,利用大连 Since 1979, it has been proved that it is feasible to use polyurethane foam pig to clean the deformed pipe after many tests in the test field and in the oil pipelines. The first half of 1980, in the northeast more than 2,000 kilometers of pipelines were promoted and achieved good results. First, the first stage of the pigging test process: in the test site on the deformation of pigs through the pipeline capacity test. Early use of Dalian