Underwater welding was invented in the year 1932 by a Russian metallurgist, known as Konstantin Krenov. This method of welding is even popular as hyperbaric welding. High-pressure application is a must for this process.
When this process takes place in a dry environment, it is termed as hyperbaric welding. Simultaneously, when the entire procedure occurs in a wet climate, it is underwater welding.
Underwater Welding Applications
This kind of welding is popular for repairing ships, pipelines, and offshore oil platforms.
Underwater Welding – Types Available
There are two significant kinds of welding performed underwater:
· Dry welding
· Wet welding
Hyperbaric Welding
Sealing of chamber tightly around the construction body of the welding structure is essential in the hyperbaric welding process. First of all, a combination of oxygen and helium or argon gas fills up space. It forces the water outside the hyperbaric zone. Thus, creating a dry environment for performing the welding process.
What Are The Benefits?
- It consists of diver safety
- High-quality welding process
- Surface monitoring capability
- Non-destructive welding process
Wet Welding
This process of welding includes special rods that help in accomplishing this purpose quickly and smoothly. The entire process occurs in underwater. Therefore, the method used for this kind of welding is similar to standard welding.
In the case of wet water welding, exposure of electrodes, and divers to the surrounding elements and water is common. Divers make use of 300 to 400 amps of DC power to charge the electrode. This process involves various types of arc welding.
There is a limitation in using this process because of the low level of carbon. The wet welding and dry welding equipment are similar.
Therefore, the design of the electrode holders helps to cool down the water. In addition, it consists of heavier insulating capability.
Advantages
- Easy access to the weld spots
- Cheaper and faster process
- No need of any specific habitat
- Strong tensile strength
Different Types Of Equipment Required?
Indeed, this process requires a commercial diver consisting of five different tools:
Electrodes
Electrodes are the most important underwater welding tool. Underwater electrodes come with high yield strength and water-resistant coating.
Power Supply
Diving Suit
Wearing a dry suit is a must for this kind of welding project. Moreover, it provides better climate protection in comparison to a wet suit.
- Diving Helmet
During the process, it is vital to wear a safe driving helmet. It helps to protect the face and eye. The helmet allows the diver to breathe during the process. Moreover, the welding screen protects the eyes of the diver.
- Accessories
Welder-divers make use of diving accessories which are as follows:
- Knife switch
It is a perfect tool that helps to cut into the project materials. It is a savior for welders. Moreover, the knife helps to wedge opens a door when they need to free themselves in critical situations.
- Bailout gas
- Compressor and gas panel
- Harness
- Umbilical cord
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