Grandview Industries Limited

David W Bennett

A pipeline expansion joint having a smooth bore, for use with pipelines into which flow slurries containing solids in suspension, comprises a first sleeve open at both ends and having a tapered portion formed in the inner wall of one of its ends extending at a small angle with the axis of the first sleeve and over a substantial portion of the length of the first sleeve from its inside diameter to substantially its outside diameter, and a second sleeve also open at both ends and having a first portion of substantially the same inner diameter as the outer diameter of the first sleeve and telescopically mounted on the above-mentioned one end of the first sleeve, a second portion of the same diameter as the first sleeve, and an intermediate portion expanded at a small angle with the axis of the second sleeve over a substantial portion of its length from the second to the first portion of such second sleeve. The above expansion joint has a smooth bore throughout with no area of abrupt changes in order to prevent turbulence and the resulting wear due to the solids in suspension in the slurries.

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Willowdale, Canada

David W Bennett