Page 169 - CITS - Welder - Trade Practical

WELDER - CITS

The second pass (hot pass) and third pass (cover pass) can be welded using 3.15mm electrode with either the
triangle motion or the alternate weave, as in vertical plate welding Take care to pause at the sides of the joint. Burn
out any entrapped slag and fill in any undesirable under- cut
The sequence of beads is shown in Fig 6. Adhere to the maximum root and face reinforcement shown
When you make the connection on completing the pass, be sure to overlap slightly. Break the arc by slowly
drawing it away from the puddle.
Clean and inspect the joint for surface defects
To run the first pass uphill, utilize the whipping method, as in welding plate in the vertical position. Use an electrode
at a push angle of 5 to 15 degrees upward, as in Fig 6. Whip upward, taking care not to darnage the surface of
the pipe on either side of the V groove. Stop when you reach 1 o’clock, as shown in Fig 6.

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CITS : C G & M - Welder - Exercise 36