Method of making a lined conduit section

Abstract

A curved section is provided for connecting in a conduit through which passes a fluid stream having solid material entrained therein. A plurality of wear strips are attached to the inside wall of the curved section. They are positioned for the solid material to impinge thereon as the fluid stream changes its direction of flow as it passes through the curved section. The wear strips are elongated members of wear resistant material positioned side-by-side along the inside wall against which the solid material impinges. The abutting sides of adjacent wear strips are beveled so that the outer edges of one adjacent strip extends over the inner edge of the other adjacent strip to provide a continuous surface of wear resistant material in the path of the entrained solid material. The wear strips are attached to the side wall of the curved section by bodies of weld metal located in openings in the wear strips that are smaller in cross-sectional area adjacent the wall to which the members are attached than they are on their outside exposed surfaces and the weld metal is applied by sequentially puddling small amounts of weld metal in first one than another of the openings so that the wear strips are not raised to a temperature that would cause the cracking of the hard wear material due to thermal stress.

The invention having been described what is claimed is: 
     
       1. A method of lining an inside surface of a conduit with a plurality of strips of hard, relatively brittle, wear resistant material formed into elongated relatively narrow strips that have openings therethrough that have smaller cross-sectional areas on one side than on the other said method comprising the steps of disposing the inside surface in a generally upwardly facing horizontal position, placing a plurality of the strips on the upwardly facing surface in adjacent side-by-side position with the ends of the openings in the strips with the smaller cross-sectional area adjacent the upwardly facing surface, puddling weld metal briefly in first one opening and then another remote from the first while allowing the weld metal in said first opening to cool, briefly puddling additional weld metal in said first one opening, likewise puddling weld metal in each said opening at plural brief intervals until each opening is filled to thereby maintain the temperature of the strips below that at which they will crack due to thermal stresses. .Iadd. 2. A method of attaching to a surface of a conduit a strip of hard, relatively brittle, wear resistant material that has openings therethrough that have smaller cross-sectional areas on one side than on the other, said method comprising the steps of disposing the surface in a generally upwardly facing horizontal position, placing the strip on the upwardly facing surface with the ends of the openings in the strip with the smaller cross-sectional area adjacent the upwardly facing surface, puddling weld metal briefly in first one opening and then another remote from the first while allowing the weld metal in said first opening to cool, briefly puddling additional weld metal in said first one opening, likewise puddling weld metal in each said opening at plural brief intervals until each opening is filled to thereby maintain the temperature of the strip below that at which it will crack due to thermal stresses. .Iaddend.