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US 4,047,659 AGranted
Method for replacing worn tubes in a gas hood
AssigneeUnited States Steel Corporation
InventorDrago M. Vucic
Life of this patent
Estimating the term…
Abstract
Method for the repair of water-filled cooling tubes of a gas hood for a basic oxygen process steelmaking furnace. The method provides for an increase in the efficiency with which repairs are made to the cooling tubes located substantially throughout the entire circumference and length of the gas hood.
Claims11
A method of repairing cooling tubes contained within a gas hood for a steelmaking vessel, said method comprising:
- cutting out the portion of tube which has been identified as in need of repair;
- squaring off the two ends of the tubing between which
- cutting a length of replacement tubing to fit the space between the two ends;
- inserting the replacement tubing in place between the two ends;
- temporarily securing the replacement tubing in place;
- radially drilling a circular hole proximate each end of the replacement tubing;
- permanently securing, in a water-tight relationship, the replacement tube at each end to the two ends of existing tubing;
- placing an equally-sized plug cut from circular tubing into the circular hole cut proximate each end of the replacement tubing;
- and
- sealing the plugs to the holes cut in the tubing to form a water-tight relationship between the two.
7 more elements
Dependencies are inferred from the claim text.