Dry welding

From GAWDAwiki

Dry welding, also known as hyperbaric welding, is a form of underwater welding carried out in a sealed chamber filled with breathable air.

Advantages of Dry Welding

1. The operator is not affected by ocean currents or marine life.
2. The welds tend to have higher quality than those produced in wet welding because they do not come in contact with water.
3. Visual monitoring of joint preparation and pipe alignment can be done from the surface.

Disadvantages of Dry Welding

1. A large support environment on the surface is needed to support the complex chamber.
2. Dry welding can be very expensive and costs escalate as depth increases.
3. Chambers cannot easily be reused.^[1]

References

1. http://www.buzzle.com/articles/underwater-welding-process-and-precautions-in-underwater-welding.html