Articulate bent pipe for transportation of powder and slurry in dry or wet state

Claim 1

An articulate bent pipe for transport of powder and slurry, comprising: a plurality of section shaped nodular pipes; a wear resistant pipe lining applied on the interior of each said nodular pipe; packing means positioned between each said nodular pipe and each adjacent said nodular pipes; and means for securing said nodular pipes together to form said bent pipe; including means for forming a step between adjacent axial edges of adjacent ones of some of said wear resistant pipe linings only at a radially outer side of said bent pipe, wherein said means for forming a step comprises means for reducing the thickness of said nodular pipe at said radially outer side of said bent pipe as compared to that of an upstream adjacent nodular pipe in a flow direction of said powder and slurry, while maintaining constant the thickness of said wear resistant pipe linings, and wherein the thickness of said nodular pipes at said radially outer side of said bent pipe is decreased for nodular pipes having said some of said pipe linings applied therein as compared to nodular pipes downstream therefrom, whereby an inner diameter of said bent pipe is decreased at said downstream nodular pipes.