Pipe conveyors are a new kind of bulk material continuously conveying equipment researched and developed on the base of conventional trough belt conveyors. pipe conveyors overcome the disadvantages and application limitations of conventional belt conveyors. pipe conveyors can convey materials in complex terrains with inclined angles up to 30°and minimum turning radius of 45 m. pipe conveyors can curve in any direction both horizontally and vertically without setting transport stations, saving 60% space compared with conventional belt conveyor systems. pipe conveyors have very good adaptability. pipe conveyors can convey materials bidirectionally by the upside and downside belts at the same time and realize multi-points loading. pipe conveyors convey materials totally enclosed so that they are very clean to the environment. pipe conveyors can run stably and reliably, consume lower comprehensive cost.pipe conveyors are widely used in industries with high environmental protection requirements, such as power plants, harbor, steel plants, cement plants, coal, mining, chemistry, building industry, etc.