A welding torch can be found in storage areas or some toolboxes.

Its uses include:

  • Welding airlocks shut
  • Opening welded airlocks
  • Cutting through walls
  • Attacking the blob
  • Attacking other people

Welding torches can only carry 20 units of fuel, and need to be refuelled at a fuel tank when this has been used up.

Click on them in your inventory to turn the torch on.