Submerged Welding (SW) is typically used for which of the following applications?

Submerged Welding (SW) is particularly suitable for applications involving the attachment of studs and insulation pins to tanks and pressure vessels. This technique is advantageous in such contexts due to its ability to provide deep penetration and high deposition rates while minimizing spatter and smoke, which are common concerns in other welding methods. The process allows for effective bonding of materials that are often subjected to high pressure and require a robust and secure weld.

Welding in confined spaces, such as those found in tanks and pressure vessels, can also benefit from the submerged arc process. The use of flux provides a protective cover over the molten weld pool, reducing oxidation and contamination, which is crucial when working with components that will encounter extreme conditions.

The other options, while related to welding processes, do not specifically align with the unique benefits and applications of submerged welding. For example, welding thin sheets of metal generally requires methods that can manage heat more precisely to prevent warping, while repairing cast iron components often employs techniques tailored for that specific material's properties. High-strength structural steel welding also often involves different considerations regarding heat treatment and post-weld processes that are not the focus of submerged welding.