Diving Operation

According to Welding Consultants, there are three main methods for performing underwater welding. The first method involves constructing a containment around the area to be repaired and then using pressurized air to displace the water, creating a dry surface with the same pressure conditions as above the water. Welding is then performed under these normal conditions. The second method also uses a containment, but the water is displaced with helium. The welder wears breathing apparatus and completes the welding on a dry surface. The third method involves wet welding with an electrode that uses a gas mixture that allows the welding arc to dry instantly without being affected by the water. For this, the welder must be a qualified scuba diver and use specially designed equipment to prevent electrical shock.