Stud and method of welding same to a boiler tube

Details Stud and method of welding same to a boiler tube Stud and method of welding same to a boiler tube

1974-09-19

1976-11-23

Truhe, J. V.

Electric heating

Metal heating

For bonding with pressure

219107, B23K 920

Patent

active

039938875

ABSTRACT:
Boiler tube studs and a method of welding the studs to boiler tubes are provided. Boiler tubes have a multiplicity of studs welded thereto and extending outwardly therefrom, with refractory material placed over the studs and held thereon to protect the boiler tubes and to prevent deterioration and wear thereof. The studs wear down over a period of time and new studs have to be welded to the tubes periodically. In accordance with the invention, the new studs are welded directly on the worn studs or nubbins without the necessity of grinding down or otherwise removing or partially removing the worn studs. The new studs have recesses in the ends to facilitate being positioned on the old studs in proper welding position and to improve the welding operation.

REFERENCES:
patent: 2708129 (1955-05-01), Kelemen et al.
patent: 3541294 (1970-11-01), Jerdonek
patent: 3671710 (1972-06-01), Coombs

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