Underwater Welding: Joint Fit-Up

Since most underwater tasks are more cumbersome than similar topside work, the proper positioning of large members or plates underwater for welding is also quite difficult. Understanding properly the skill of underwater welding joint fit-up is therefore important. Positioning and fitting must be done with thoroughness and care to ensure a satisfactory weld. In underwater … Read more

Underwater Welding Overview

In underwater welding, the installation of large patches, as well as the attachment of suitable pad-eyes presents a more complicated problem to the diver than does the underwater cutting. Considerable practice is necessary to achieve a consistently good standard of underwater welding for salvage work. As a result, the diver’s underwater welding techniques must conform to … Read more

Conditions Adverse To Underwater Welding

Before welding operations are started, the job should be inspected to determine whether or not the welding can be performed effectively at the worksite. Satisfactory underwater welds are more difficult than welds laid down topside. The following factors make underwater welding difficult: a. Diving apparelb. Where a steady platform cannot be provided from which to … Read more

Underwater Welding

Although underwater welding does not have as many applications in marine salvage operations as underwater cutting, underwater welding is an extremely important and useful process. By substituting welding for mechanical methods of joining, the overall cost and time spent on the job can be reduced considerably. Historically, most underwater welding was done for the purpose of making … Read more

Underwater Cutting & Welding

Oxygen arc cutting Steel-Tubular Electrodes  Oxygen arc cutting Steel-Tubular Electrodes The oxygen arc cutting steel-tubular electrode consists of a steel tube with a waterproofed  flux coating which is applied during the manufacturing process. The electrode is 14 inches long with a 5/16-inch outer diameter and a bore diameter of slightly less than 1/8 inch. The… Read … Read more

Underwater Shielded Metal Arc Welding Electrodes

Commercial manufacturers have made significant progress in the development of waterproofing systems for wet welding electrodes. Details of these systems are proprietary to each manufacturer; however, the results of their cumulative efforts have produced a new generation of wet welding electrodes. Certain electrodes are manipulative types for use in all positions. With the correct welding … Read more

Underwater Welding: Wet Welding

In underwater welding, the wet welding process used for salvage operations is usually a simple underwater joining technique. The materials required are commercially manufactured shielded metal arc equipment and waterproofed electrodes. Minimal ancillary devices are needed. These include lighting, staging, and hand tools. There are advantages to wet welding. The underwater welder can work freely on … Read more