How to Weld Underwater

Step-by-Step Guide

1. 1

   Step 1: Identify the site and material of the joint to be welded and clean it.

   Most underwater welds involve steel, but metals may vary.
2. 2

   Step 2: Prepare a chamber to place around the joint (each joint should have a separate chamber).

   Chambers range in size
   - some are large enough to fit several welder-divers, others are only small enough for the welding electrode. , A typical gas mixture uses helium and oxygen, but requirements vary based on the specific joint to be welded.
   
   The pressure of the chamber should be slightly above that of the surrounding water. , Multiple electrodes will likely be required, and should be placed in advance in front of the area of the joint to be welded. ,,,
3. 3

   Step 3: Introduce gas into the chamber and pump out the water.

4. 4

   Step 4: Run a power supply to the chamber and set up a port for your electrodes.

5. 5

   Step 5: Dive to the weld site.

6. 6

   Step 6: Turn on the power supply and weld the joint from outside the chamber.

7. 7

   Step 7: Turn off the power supply as soon as the welding is done.

Detailed Guide

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