Abstract: The slurry pipeline in PNG Ramu Nico red soil ore project generated accelerated flow in the section of K44+300 to K45+400 on the test running stage when it completed，and it caused a displacement on vertical and horizontal direction of the pipeline on the section of K43~K45+800(about 3 km). The maximum displacement is up to 1.5 m，anchors of pipeline cracked，pine supports inclined，optical cable along the pipeline be snapped. In order to eliminate accelerated flow，an S-shaped transitional bend circuit laying method was suggested，and the pipe laying technology was modified at the same time. After modification，the pipeline did not generate accelerated flow on the next test running. It works well，and has a sound effect.

Key words: Slurry pipeline, Accelerated flow, Traditional eliminating method, S-shaped transitional bend circuit