How do underwater welding torches work?
#88428. Asked by BRY2K. (Nov 12 07 6:18 PM)
"Underwater" Welding is not Flame. It is Electrical-Arc.|
Here is a few pictures...
Underwater welding can be divided into three main types:
* Wet underwater welding, where manual metal arc welding (MMA) is the most common process. Flux-cored arc welding (FCAW) has been widely used in the former Soviet Union. Friction welding, which has the advantage of being relatively insensitive to depth, and which lends itself to robotic operation, has the potential for use in deep water repair.
There does exist "Sub Surface" Welding where an air cavity is utilized.
* Coffer dam welding, which is carried out in the dry, in air, where a rigid steel structure to house the welders is sealed against the side of the structure to be welded, and is open to the atmosphere.
* Hyperbaric welding, in which a chamber is sealed around the structure to be welded, and is filled with a gas (commonly helium containing 0.5 bar of oxygen) at the prevailing pressure.
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