Page 44 - CITS - Welder - Trade Practical

WELDER - CITS

Fig 1 Fig 2

Deslag and clean the root bead thoroughly.
Deposit the final covering run with a 4mmø medium coated MS electrode and 160 amp current.

Give side-to-side movement to the electrode not more than 2.5 times its dia.
Use the same electrode angle as was used for the root bead.
Note: Prevent the upper edge of the plate from melting off by not allowing the arc to concentrate more
on the upper edge.
Remove the slag with a chipping hammer.
Clean the weld with a steel wire brush.
Inspect the lap fillet weld (Fig 3) and ensure:

Fig 3

• It has equal leg length with slight convexity

• The upper edge of the plate has not melted off
• it is free from surface defects.

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CITS : C G & M - Welder - Exercise 6