Bottom nozzle repair apparatus

Pipes and tubular conduits – With closures and plugs – Laterally insertable

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Details

138 97, 138 98, 220234, 2940215, 137315, F16L 5510

Patent

active

060326964

ABSTRACT:
Apparatus for repairing a breach in a lower nozzle of a glass lined vessel which includes an internal flange having an upper surface, a lower surface, an outside end surface and an inside end surface. The apparatus further includes an insert tube having an outside diameter sized to permit insertion through the nozzle and of sufficient length to extend completely through the nozzle and extend beyond a lowermost portion of the nozzle. The insert tube has an inside surface, and an external surface having an upper end portion. The upper end portion of the external surface of the insert tube is in contact with and integral with the inside end surface of the internal flange. The insert tube is usually welded to the internal flange at that location. The external surface of the insert tube is threaded below the lowermost portion of the nozzle. The apparatus of the invention also includes a liner of corrosion resistant metal, e.g. tantalum, covering the inside surface of the insert tube, the upper surface of the internal flange, the outside end surface of the internal flange and at least a portion of the lower surface of the inside flange. A thrust plate flange is provided that is threadable over the external surface of the insert tube below the lowermost portion of the nozzle. The thrust plate flange is provided with threaded bolt holes. Bolts are provided for threading into the bolt holes for forcing the thrust plate flange in a direction away from the lowermost portion of the nozzle thus forcing said insert tube and attached internal flange in a direction which causes the tantalum lined lower surface of the internal flange and the corrosion resistant lining of the vessel to seal against an internal flange gasket located between said lower surface of the internal flange and the corrosion resistant lining of the vessel.

REFERENCES:
patent: 172528 (1876-01-01), Walker
patent: 3236407 (1966-02-01), Zelman et al.
patent: 4078697 (1978-03-01), Schlosberg et al.
patent: 4497418 (1985-02-01), Nunlist
patent: 5556113 (1996-09-01), Amorese et al.
Bulletin SP-1A Sep. 1991 of Spectrum Products, Inc.

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