3. INTRODUCTION
Welding is one of the unavoidable process of modern
engineering.
Under water welding
provides a means to a
assemble or repair
underwater.
4. ORIGIN
First Under Water Welding was invented by Russian
metallurgist Konstaintin Khrenov in 1930.
Special water proof electrodes were developed in Holland
by Van Der Willingen in 1946.
First under water welding was applied by British Admiralty
in Dock Yard.
5. TYPES OF UNDER WATER
WELDING
Dry Welding.
In this process it is seal by
closed chamber filled with
gas at elevated pressure.
Wet Welding.
In this process it is directly
exposed to the environment.
And a special water proof
electrode is used.
6. ADVANTAGES OF UNDER WATER
WELDINGs
A. Dry Welding.
i. Driver Safety
ii. Good Quality Weld
iii. Surface Monitoring
iv. Non Destructive Testing Possible.
B. Wet Welding.
i. More versatile and low cost.
ii. Easily reachable any portion of area.
iii. High Operating Speed
iv. Minimal amounts of equipment is needed.
9. Application
1. Offshore
2. Construction
3. Ship and Submarine
4. Pipe Lines and Tunnels
5 Salvaging Vessel sunk inside water
6. Oil Refineries.
10. FUTURE SCOPE
Automation of the underwater joining and inspection.
2. Mechanized underwater welding for actual usage of
a very large floating surface.
3. Investigation by using a robot manipulator for
underwater ultrasonic testing for complex geometry.
4. Application of advanced welding technique,
like friction, laser welding.
5. Invention of new welding techniques and explore
the possibility.
