Do you know which Underwater Welding Technique is Superior?

Underwater welding is an important part of any industry where structures are underwater, or shipping is involved. It doesn’t matter whether the structure is a fully submerged pipeline, a partially underwater platform, or a ship. Metal structures need to be repaired, and not all of them can be removed from the water.

That’s why it’s important to develop useful underwater welding technology. The ideal underwater weld would be strong enough to be a permanent part of the structure, quickly implemented, and inexpensive, as well as being safe. Unfortunately, most underwater welding technologies have a few drawbacks.

There are a number of risks involved in most underwater welding, so it needs to be done carefully, by specialists who know what they’re doing. Underwater welders are in demand in many industries, including shipping, oil and gas, and even military operations.

Underwater welding can be separated into two basic types - wet and dry. During the process of wet welding, the weld is exposed to the water. This is a fast, inexpensive method that’s often used when a ship or structure can’t be removed from water.

The big disadvantage of wet underwater welding is that it doesn’t have the same structural stability you’d find in a dry weld. The presence of water can cause hot and cold spots, interrupt the process, or even create pockets of oxygen and hydrogen that can become explosive. Since wet welds aren’t as strong as dry welds, they’re almost always temporary, and they don’t provide high percentages of elongation.

Wet underwater welds often need to be repaired, and they require regular damage inspections. This kind of welding offers an alternative to prematurely dry docking a ship, but in the long run, it’s not always the cheapest solution.

Dry underwater welding is often referred to as hyperbaric welding. It’s usually carried out in a chamber built to isolate the weld from the water outside. This chamber may be pressurized and contain inert gas. Chambers vary from large enough to hold the welder and all his or her equipment to small enough to surround only the weld.

One variant of dry underwater welding developed by Neptune Marine uses a small chamber filled with inert gas. This gas is pressurized to one unit above the outside water pressure, which prevents contamination. The small chamber can be easily and quickly built, which is why this is one of the least expensive forms of dry underwater welding.

Dry underwater welding is usually thought of as time consuming and expensive, so it’s not often used for repairs that must be done quickly. It can be disruptive to ordinary routines, because it’s often complicated, but it produces a much stronger weld.

Underwater welding has a number of risks associated with it. One of them is shock from improperly insulated or used equipment. Another is decompression sickness, a problem that can be avoided with the right precautions, but which can be lethal if they’re not observed.

Each type of welding has its own benefits and problems. Choosing the correct method for your application is a matter of knowing what you need and what your resources are. Investigate all your options, even those that are new on the market, to get the right underwater welding solution.