Bent pipe for passing therethrough a material containing solids

Details Bent pipe for passing therethrough a material containing solids Bent pipe for passing therethrough a material containing solids

F - Mech Eng,Light,Heat,Weapons

16

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F16L 9/02 (2006.01) B21C 37/15 (2006.01) B22D 13/00 (2006.01) B32B 15/01 (2006.01)

Patent

CA 2299936

A bent pipe for use in piping arrangement for transporting materials conaining solids, the bent pipe being prepared by subjecting to high-frequency bending work a straight blank pipe prepared by centrifugal casting and having a plurality of layers. The straight blank pipe comprises an outer layer made of a steel having high weldability, and an inner layer made of a high Cr cast iron containing at least Cr in an amount of 10 to 35 wt. % and having high wear resistance, the outer layer and the inner layer being metallurgically joined. Preferably, a barrier layer is provided between the outer layer and the inner layer for preventing an alloy component in each of the layers from diffusing into the other layer. The barrier layer is preferably about 10 to about 100 µ m in thickness.

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