Fuse together metal using heat, explosions, and other tools.
Cuts, trims, or scarfs metal objects to dimensions, contour, or bevel specified by blueprints, layout, work order, or oral instructions, using thermal-cutting equipment: Lifts and positions workpiece onto table, manually or using jib or crane. Connects hoses from torch to oxygen tank and fuel gas tank, such as acetylene or propane. Selects torch tip, gas pressures, speed of cut, and allows for width of cut, according to thickness and type of metal as computed from charts. Installs torch tip and turns handle to start and adjust pressure of fuel gas. Lights torch and adjusts flow of oxygen to obtain desired mixture, as indicated by color and size of flame. Directs flame on workpiece to heat it to oxidizing temperature, as indicated by color of metal. Squeezes lever or trigger to release additional jet of oxygen which burns path through metal. Guides flame along cutting line, observing cutting to judge angle, distance of torch, and speed of movement. Removes and inspects finished workpiece. Chips or grinds burrs from edges, using power chisel or portable grinder. May lay out cutting lines, using rule, square, compass, or by tracing from template. May cut damaged or worn pieces from metal structure, such as bridge or building frames, ship plates, or pipelines. May install special tip to cut grooves into metal joints preparatory to welding and be designated Flame Scarfer.