Blow out all air and moisture condensation from lines. Remove all
condensation from base metal before welding. Metals stored in cold
temperatures will condensate when exposed to warm temperatures.
2. Loose fittings in torch or hoses.
Tighten fittings on torch and all hoses.
3. Inadequate gas flow.
Adjust flow rate as necessary. Gas flow should typically be set at
15 to 20 cfh.
4. Defective gas hose or loose connection.
Replace gas hose and check connections for leaks, cuts, or pin holes.
5. Contaminated or improper filler metal.
Check filler metal type. Remove all grease, oil, or moisture from
filler metal.
6. Base metal is contaminated.
Remove paint, grease, oil, and dirt, including mill scale from base
metal.
Do you have a situation where the pipe becomes sealed as the weld is finished? This could create back pressure from the expanding atmosphere in the pipe. The solution is to drill a vent hole, if so.
TIG Welding and Mild Steel
Re: TIG Welding and Mild Steel
