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 work site. Satisfactory underwater welds are more difficult than welds laid down topside. The following factors make underwater welding difficult:

a. Diving apparel
b. Where a steady platform cannot be provided from which to weld. (Working near the surface in rough water makes it difficult to provide a stable platform. When working from a stage, it is preferable to attach the stage to the object being welded rather than to the salvage ship, diving launch or float, since the rising and falling of the surface vessel in rough water changes the position of the stage relative to the object being welded.)