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Title: Underwater welding

Abstract

A process is described for arc welding in an under-water environment wherein a welding chamber is positioned adjacent a workpiece, and an arc welding torch is positioned therein. A gas under pressure is introduced into the chamber to displace the water, and a gas is supplied to the torch at a pressure greater than the pressure of the gas in the chamber. The welding torch is of the TIG or constricted-arc (plasma) type. High-amperage, low-voltage power shielding gas under high pressure is supplied through a cable from an electric generator and gas cylinder on a barge. The electric arc is used merely to melt the metal of the workpiece to form the weld puddle. In order to make a butt or other weld, it is necessary to deposit additional metal. Such metal is normally supplied by a filler wire which is fed along its length into the arc zone, where it becomes fused and falls, is sprayed or otherwise enters the weld puddle. (6 claims)

Inventors:
;
Publication Date:
OSTI Identifier:
6860692
Patent Number(s):
US 4039798
Assignee:
BOC International Ltd.
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 10 Jun 1974, United Kingdom of Great Britain and Northern Ireland (UK); Other Information: PAT-APPL-25,596
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ARC WELDING; EVALUATION; ELECTRIC GENERATORS; USES; UNDERWATER OPERATIONS; FABRICATION; JOINING; WELDING; 423000* - Engineering- Marine Engineering- (1980-)

Citation Formats

Lythall, D J, and Wilson, E M. Underwater welding. United States: N. p., 1977. Web.
Lythall, D J, & Wilson, E M. Underwater welding. United States.
Lythall, D J, and Wilson, E M. Tue . "Underwater welding". United States.
@article{osti_6860692,
title = {Underwater welding},
author = {Lythall, D J and Wilson, E M},
abstractNote = {A process is described for arc welding in an under-water environment wherein a welding chamber is positioned adjacent a workpiece, and an arc welding torch is positioned therein. A gas under pressure is introduced into the chamber to displace the water, and a gas is supplied to the torch at a pressure greater than the pressure of the gas in the chamber. The welding torch is of the TIG or constricted-arc (plasma) type. High-amperage, low-voltage power shielding gas under high pressure is supplied through a cable from an electric generator and gas cylinder on a barge. The electric arc is used merely to melt the metal of the workpiece to form the weld puddle. In order to make a butt or other weld, it is necessary to deposit additional metal. Such metal is normally supplied by a filler wire which is fed along its length into the arc zone, where it becomes fused and falls, is sprayed or otherwise enters the weld puddle. (6 claims)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {8}
}