US 2013/0340874 A1 · METHOD TO REPAIR COMPROMISED INLET OUTLET PIPING

Abstract

Pipe fractures in cooling staves of blast furnaces are a common failure mechanism Herein is a repair method for a cooling stave utilized in a blast furnace, the cooling stave having a compromised stave inlet outlet pipe attached to the cooling pipe in the cooling stave, the method comprises of the steps of inserting a rigid pipe into the compromised stave inlet outlet pipe to form a first annulus; inflating a bladder disposed inside the inner pipe and cooling stave; injecting a first uncured epoxy material into the first annulus; permitting the first uncured epoxy to cure; and removing the bladder.

Claims9

Dependent claims

A method for repairing a cooling stave in situ wherein, the cooling stave having a stave inlet outlet pipe attached to a cooling pipe in the cooling stave, the method comprising:

inserting a pipe into the stave inlet outlet pipe to form a first annulus;
inflating a bladder disposed inside the pipe and cooling stave;
injecting a first uncured epoxy material into the first annulus;
permitting the first uncured epoxy to cure;
and
removing the bladder.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/707,213Filed 6 Dec 2012

Priority

6 Dec 2011

Published

26 Dec 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

C21B 7/10
Blast furnaces: cooling; Devices therefor
F16L 55/1657
A pipe or flexible liner being inserted in the damaged section: lengths of rigid pipe being inserted
F16L 55/175
From outside the pipe: by using materials which fill a space around the pipe before hardening
F16L 55/179
Devices for covering leaks in pipes or hoses, e.g. hose-menders: specially adapted for bends, branch units, branching pipes or the like

Method to repair compromised inlet outlet piping

Life of this patent

Method to repair compromised inlet outlet piping

Life of this patent

Abstract

Claims9