Welder 3G-4G

Essential Job Duties And Responsibilities

• Welds together metal components of products, such as pipelines, as specified by layout, blueprints, diagram, work order, welding procedures, or oral instructions, using electric arc-welding equipment.
• Obtains specified electrode and inserts electrode into portable holder or threads consumable electrode wire through portable welding gun.
• Connects cables from welding unit to obtain amperage, voltage, slope, and pulse, as specified by the Welding Inspector.
• Starts power supply to produce electric current.
• Strikes arc which generates heat to melt and deposit metal from electrode to workpiece and join edges of workpiece.
• Manually guides electrode or gun along weld line, maintaining length of arc and speed of movement to form specified depth of fusion and bead, as judged from color of metal, sound of weld, and size of molten puddle.
• Examines weld for bead size and other specification.
• Makes manual application of filler rod to supply weld metal.
• Cleans or degreases weld joint or workpiece, using wire brush, portable grinder, or chemical bath.
• Repairs broken or cracked parts and fills holes.
• Prepares broken parts for welding by grooving or scarfing surfaces.
• Chips off excess weld, slag, and spatter, using hand scraper or power chipper.
• Preheats workpiece, using hand torch or heating furnace.
• Positions and clamps workpieces together or assembles them in jig or fixture.
• Tacks assemblies together.
• Cuts metal plates or structural shapes.
• Operates other machine shop equipment to prepare components for welding.

Specific Knowledge/Skills

• Must be a certified welder who possesses a written certification from an employer or certifying agent, such as governmental agency, and professional or technical association, verifying that worker’s production of specified welds meets prescribed standards.
• Welders are classified according to welding process or workpiece.
• Skill in several welding processes {I.e. FCAW; GTAW; GMAW), will be required to pass company administered 3G – 4G qualification test.