The global rise in demand for oil and gas is expected to reach 99.3 million b/d in 2018. As a result, this has increased offshore activities and further exploration into the deep blue oceans. The desire to construct, maintain and repair structures offshore has brought the need for underwater welding.
In the light of the complicated nature and high costs of wet welding, the potential gain from using new techniques is obvious – there is a lot of room for improvement.
Understanding the Basic Wet-Welding Techniques
For successful wet-welding, whether you are a novice or experienced welder, it is important to accept why the range of skills used for dry surface welding don’t work underwater. The process can either take place wet in the water or dry inside a pressurized environment. This is because the basic techniques of welding underwater are reliable and in fact, very simple. Such techniques include:
- Self-Consuming or Drag – The electrodes are dragged across the work and applied with downward pressure while being consumed. The diver must maintain the appropriate slope and lead angle, producing a suitable profile.
- Oscillation – The electrode oscillates so that the point closest to the holder falls in a vertical direction. This aids in metal deposition and prevents burning when welding in the root of a joint.
- Step-Back – This technique aids in improvements and involves the use of stalling the forward speed then traveling backward. It is more difficult due to the higher level of control required.
Improving the Procedure with Hybrid Technology
When searching for techniques to improve the metal fabrication process, it is important to examine the mode of transfer, wire feed speed, wire diameter, travel speed, and more. As a combination of an arc and laser welding in the same pool, hybrid welding is used for faster results and reflects in expectations for greater usage and reliable techniques.
The combination has proven results such as low thermal load and high energy density, welding speed, deep penetration, quality gap bridging capacity, and high tensile strength.
Spotting Waste in a System
If you spend time on such activities as grinding spatter, chipping slap, or grinding welds down to the final size, this won’t prepare you for the next step in the process.
In fact, labor time is wasted by compensatory activities, resulting in 20% progress in many operations. Efficient water welding companies have an operator factor of 30% and above, receiving significant financial costs as a result. Mini habitats, Cofferdams, and Caissons are all effective ways of creating a dry weld.
If dry welds can be performed, then it is a better option when possible. However, if you are looking to save money, build reliability, and boost productivity; wet welding is the faster, yet less expensive way to perform.
Underwater welding is one of the most in-demand jobs in the planet with advancing technologies in robotic capabilities and training. Not to mention, welder divers will have more freedom beneath the water and reach areas of a structure that cannot be achieved otherwise.