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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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