Abstract
The evaluation of pipe wear is necessary for development of seafloor massive sulfides. The authors conducted three types of the flow loop wear experiment to obtain the basic data of pipe wear during slurry transport. In the experiments, the differentials of pipe wear among inner material and the effect of pipe inclination on the wear were investigated. As a result, the wear resistance of SUS304 was higher than plastic and rubber, the wear volume was largest in 30 degrees of inclination angle in the experiment. Then the influence of solids degradation on the wear rates was also investigated. We estimated the decrements of wall thickness in the lifting pipe based on the results of the flow loop wear experiments. As the result of this estimation, it was estimated that the time required for decrements of 1mm in a rigid riser of SUS304 was 88 days.
