Welding joint and backing sleeve therefore
AssigneesHMC H. Meyer & Co. Spezialstahl GmbH, Hoogovens Groep B.V.
InventorsJoachim Horn, Jan Slings
Life of this patent
Estimating the term…
Abstract
Welding joint (18,22) connecting workpieces (19,20,24,29) having a throughlet (25) comprising a weld (21,34) wherein a backing sleeve (10,28) is held within the workpieces (19,20,24,29) in the region of the weld. The welding joint comprises a partition layer (15,33) of a non-weldable material between the workpieces (19,20,24,29), the weld (21,34) and the backing sleeve (10,28), resulting in a welding joint easy to establish and of improved strength and fatigue resistance.
Claims20
A welding joint in which workpieces (19,20,24,29) such as pipes, bends, and junction parts, having a throughlet (25) are welded together by means of a weld (21,34) and a backing sleeve (10,28) is positioned on the inside of the workpieces (19,20,24,29) in the region of the weld (21,34), at least one of said workpieces (19,20,24,29) widening into a conical shape towards the weld (21,34), the backing sleeve (10,28) having corresponding outer surfaces (12,13,30), said welding joint comprising a partition layer (15,33) from a non-weldable material which partition layer is located between the workpieces (19,20,24,29) and the backing sleeve (10,28) extending at least over the region of the weld (21,34), said backing sleeve (10,28) being permanently held in the welding joint ( 18,22 ) by its shape.
An annular backing sleeve (10,28) positionable on the inside of workpieces (19,20,24,29) in a region of a weld (21,34) to be made, said backing sleeve having a portion thereof conical in shape, narrowing away from the region of the weld (21,34) to be made, said backing sleeve comprising a partition layer (15,33) from a non-weldable material which partition layer is located on the outside of said backing sleeve (10,28) extending at least over the region of the weld (21,34) to be made, said backing sleeve (10,28) being permanently retainable in a welded joint (18,22) by its shape.
Dependencies are inferred from the claim text.