Sunday, July 15, 2012

Underwater welding


Underwater welding refers to a number of distinct welding processes that are performed underwater . The two main categories of underwater welding techniques are wet underwater welding and dry underwater welding, both are classified as hyperbaric welding. In wet underwater welding, a variation of shielded metal arc welding is commonly used, employing a waterproof electrode. Other processes that are used include flux-cored arc welding and friction welding . In each of these cases, the welding power supply is connected to the welding equipment through cables and hoses.

The applications of underwater welding are diverse—it is often used to repair ships, offshore oil platforms, and pipelines. Steel is the most common material welded. For deepwater welds and other applications where high strength is necessary, dry underwater welding is most commonly used.

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