Page 199 - CITS - Welder - Trade Practical

WELDER - CITS

Job Sequence

- Cut the plates by gas/hacksaw cutting as per drawing
- Set the pieces in the form of Tee as per drawing

- Tack weld on both ends of the tee joint
- Keep the tack welded job in the channel at 45 degrees from the horizontal plane so that the welding can be
done in flat/down hand position
- Select dia 1.2 mm CCMS wire.

- Set 70 to 90 Amp current
- Ensure proper root penetration and even fusion of plate A and B with suitable welding gun / torch angle and
Arc travel speed

- Clean the root run using steel wire brush
- Deposit the 2nd run using stringer bead covering the bottom plate A and 2/3 of the width of the root run. Adopt
the same welding parameters under techniques used for the root run.
- Ensure the undercut in bottom plate is avoided and a leg length of plate thickness 10mm is obtained.
- Clean the second run by wire brush
- Use tongs while handling the hot job

Note: Wear protective clothing.

• Tack-weld on both ends.
• Set the lap joint in a flat position.
• Deposit root run by with 100-110 amps current.

Note: Ensure an electrode angle of 45° with the fillet corner and 80° with the welding line.

- Check all the connections before welding
- Welding area should be dry area

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CITS : C G & M - Welder - Exercise 50(B)