![]() ![]() But if wet welding involves strong arcs of electricity, how are divers not electrocuted? If a hyperbaric chamber is not available for the job, welders may resort to wet welding. It is very important that the chamber be pressurized just right, otherwise, the underwater welders may suffer from decompression sickness. The chamber fills with a mixture of helium and oxygen gas which pushes the water out, dries the work area, and pressurizes the chamber. Hyperbaric welding, as we mentioned before, involves a sealed chamber fixed around the work area. Underwater welding differs from welding on land in many ways. Welds are incredibly strong bonds, sometimes exceeding the strength of the original pieces. Once the weld cools, the two pieces have joined together to form one piece. Welding involves using a powerful electrical arc to superheat two pieces of metal, causing them to melt and fuse together while hot. Hyperbaric welding is considered the long-term fix, conversely to wet welding. Other important advantages include a higher level of safety for the divers, as well as the option to test their welds. In a dry environment, underwater welders have much more control over their work, significantly increasing the chances of a successful weld. Most of these chambers have room enough for up to three divers at once. Once the chamber has fully sealed, it will fill with oxygen and helium to dry everything out. Therefore, most underwater welders prefer this type of welding.īefore the actual dry welding can begin, a chamber must be constructed around the area that needs welding. Hyperbaric welding is the term more commonly used interchangeably with “dry welding.” Dry welding is widely considered by underwater welders to be safer than wet welding.
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