Page 62 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 9: Single “V” butt joint on MS plate 12mm

thick in horizontal position (SMAW)

Objectives

At the end of this exercise you shall be able to
• prepare the plate edges to prevent effect of gravity on deposited metal
• maintain root penetration by the manipulation of electrodes
• weld single ‘V’ butt joint in horizontal position preventing sagging of weld metal
• clean and inspect for surface defects.

Job Sequence

• Cut the MS plates 10mm thick to size.
• Bevel the edges.
• One of the plates is beveled to 45° by gas cutting.
• The second plate is beveled to 15° by gas cutting.
• Clean the edges and remove all the burrs.

• Preset the single ‘V’ for controlling the distortion.
Note: Wear safety clothing.
• Tack the beveled plates with a root gap of 2 mm.

• Fix the joint in horizontal position such that the member with 45° bevel as the top member with 15° beveled
member as the bottom member.
• Deposit the root run starting from top plate and fuse the bottom plate also. Maintain uniform penetration
throughout.

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