Page 120 - CITS - Welder - Trade Practical

WELDER - CITS

EXERCISE 24 : Square butt joint on stainless steel sheet

2mm thick in flat position (OAW)

Objectives

At the end of this exercise you shall be able to
• clean the chromium oxides and other impurities that exist on the surface of the stainless-steel sheet
• prepare square edges on stainless steel sheets
• apply stainless steel flux on the edges of the sheet to be welded
• select suitable stainless steel filler rod, nozzle, gas pressure
• set a perfect neutral flame
• weld the square butt joint with uniform root penetration using leftward technique
• clean the joint and inspect for weld defects.

Job Sequence

• Prepare the stainless-steel sheet as per dimensions.
• Clean the edges of the sheets.
• Select the nozzle No. 5 for 3.15 mm thickness.
• Select the stainless-steel flux and apply on both sides of the edges of the joint by using a 12mm paint brush
and apply on filler rod.
• Set and align the stainless-steel sheet as square butt joint.
• Set perfect neutral flame.

• Tack-weld at every 50mm length of the butt joint.
• Weld the joint using leftward technique.
• Clean the joint and inspect the weld for defects.

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