Is the United States the worlds leader in PCP technology?
No. The current world leader in PCP technology is Japan which has developed and used PCP systems successfully. For example, in Kuzuu City, Japan, a 1-meter (3.28 ft) diameter PCP is being used for transporting limestone from a quarry to a cement plant owned by the Sumitomo Company. This 2-mile-long pipeline is buried underground beneath an abandoned railroad track. It has been used very successfully since 1983. The Sumitomo Metal Industries, Ltd. is currently marketing new PCP systems in Japan and around the world.