Electricite De France

Societe Anonyme Dite: Stein Industrie

Societe Anonyme

Gilbert Vigneron

Jean Bezier

Guy Zacharie

Pierre Vidal

Jacques Bobichon

Thong Nguyen-Thanh

Lucien Guillemin

Lucien Hervouin

To repair a corroded region of the end of a heat exchanger tube, a sleeve is inserted, then expanded into the tube both in the area of the tube sheet and beyond the corroded area, then local welds are made in each of the expanded regions. Thereafter, the end of the sleeve is expanded against the tube in a region inside the tube sheet and above the local weld.

Method of repairing or protecting an end of a metal tube in a heat

A plug for an opening providing an inspection X-ray source with access to pipework or to an apparatus made of a high strength steel alloy which is fragile in welding, the plug comprising an open ended cylindrical component (6) which is welded (8) to the wall of the pipework or the apparatus, and which projects therefrom, said component being made of the same steel as the pipework or the apparatus, and a second cylindrical component (9) for closing the bore through the first component. The second cylindrical component is fixed to the outer end of the first component and in line therewith by means of a butt weld (10).

Plug for an opening providing an inspection X-ray source with access to

Growing community of inventors

Boulogne sur Seine, France

Gilbert Vigneron