Page 44 - CITS - Welder - Trade Practical
P. 44
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.
27
CITS : C G & M - Welder - Exercise 6