20
Weld seam porosity
Cause:
Spatter build-up in the gas nozzle causing inadequate gas shield for weld
seam
Remedy:
Remove welding spatter
Cause:
Holes in gas hose or hose is not connected properly
Remedy:
Replace gas hose
Cause:
O-ring on central connector has been cut or is faulty
Remedy:
Replace O-ring
Cause:
Moisture/condensation in the gas line
Remedy:
Dry gas line
Cause:
Gas flow is either too high or too low
Remedy:
Correct gas flow
Cause:
Insufficient gas flow at start or end of welding
Remedy:
Increase gas pre-flow and gas post-flow
Cause:
Rusty or poor quality wire electrode
Remedy:
Use high-quality wire electrode with no impurities
Cause:
For gas-cooled welding torches: gas is escaping through a non-insulated in
-
ner liner
Remedy:
Use only insulated inner liners with gas-cooled welding torches
Cause:
Too much parting agent applied
Remedy:
Remove excess parting agent/apply less parting agent
Summary of Contents for MTG 320i
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