Construct, assemble, maintain, and repair stationary steam boilers and boiler house auxiliaries. Align structures or plate sections to assemble boiler frame tanks or vats, following blueprints. Work involves use of hand and power tools, plumb bobs, levels, wedges, dogs, or turnbuckles. Assist in testing assembled vessels. Direct cleaning of boilers and boiler furnaces. Inspect and repair boiler fittings, such as safety valves, regulators, automatic-control mechanisms, water columns, and auxiliary machines.

• Boilerhouse Mechanic
• Boilermaker Apprentice
• Boilermaker Fitter
• Boilermaker I
• Boilermaker II

• Assemble large vessels in an on-site fabrication shop prior to installation, in order to ensure proper fit.
• Attach rigging, and signal crane or hoist operators to lift heavy frame and plate sections and other parts into place.
• Bell, bead with power hammers, or weld pressure vessel tube ends, in order to ensure leakproof joints.
• Bolt or arc-weld pressure vessel structures and parts together, using wrenches and welding equipment.
• Clean pressure vessel equipment, using scrapers, wire brushes, and cleaning solvents.
• Examine boilers, pressure vessels, tanks, and vats to locate defects such as leaks, weak spots, and defective sections so that they can be repaired.
• Inspect assembled vessels and individual components, such as tubes, fittings, valves, controls, and auxiliary mechanisms, to locate any defects.
• Install manholes, handholes, taps, tubes, valves, gauges, and feedwater connections in drums of water tube boilers, using hand tools.
• Install refractory bricks and other heat-resistant materials in fireboxes of pressure vessels.
• Lay out plate, sheet steel, or other heavy metal, and locate and mark bending and cutting lines, using protractors, compasses, and drawing instruments or templates.
• Locate and mark reference points for columns or plates on boiler foundations, following blueprints and using straightedges, squares, transits, and measuring instruments.
• Position, align, and secure structural parts and related assemblies to boiler frames, tanks, or vats of pressure vessels, following blueprints.
• Repair or replace defective pressure vessel parts, such as safety valves and regulators, using torches, jacks, caulking hammers, power saws, threading dies, welding equipment, and metalworking machinery.
• Shape and fabricate parts, such as stacks, uptakes, and chutes, in order to adapt pressure vessels, heat exchangers, and piping to premises, using heavy-metalworking machines such as brakes, rolls, and drill presses.
• Shape seams, joints, and irregular edges of pressure vessel sections and structural parts in order to attain specified fit of parts, using cutting torches, hammers, files, and metalworking machines.
• Straighten or reshape bent pressure vessel plates and structure parts, using hammers, jacks, and torches.
• Study blueprints to determine locations, relationships, and dimensions of parts.

• adhere to safety procedures
• align or adjust clearances of mechanical components or parts
• apply cleaning solvents
• assemble and install pipe sections, fittings, or plumbing fixtures
• build or repair structures in construction, repair, or manufacturing setting
• burn (cut), trim, or scarf metal objects
• cut metal or plastic
• cut, bend, or thread pipe for gas, air, hydraulic, or water lines
• determine installation, service, or repair needed
• determine project methods and procedures
• fabricate sheet metal parts or items
• fabricate, assemble, or disassemble manufactured products by hand
• identify base metals for welding
• identify properties of metals for repair or fabrication activities
• inspect machinery or equipment to determine adjustments or repairs needed
• install generating plant equipment
• install or replace meters, regulators, or related measuring or control devices
• lay or install brick, block, stone, tile, or related masonry material
• lay out machining, welding or precision assembly projects
• maintain or repair industrial or related equipment/machinery
• maintain welding machines or equipment
• make independent judgment in assembly procedures
• measure and mark reference points or cutting lines on workpieces
• move or fit heavy objects
• overhaul power-generating equipment or machinery
• perform safety inspections in industrial, manufacturing or repair setting
• position, align, or level machines, equipment, or structures
• pressure test piping system or equipment for leaks
• read blueprints
• read specifications
• read technical drawings
• recognize characteristics of alloys
• recognize characteristics of metals
• repair or adjust measuring or control devices
• repair or replace gas, steam, sewer, or water piping or fixtures
• repair or replace malfunctioning or worn mechanical components
• signal directions or warnings to coworkers
• stretch, bend, straighten, shape, pound, or press metal or plastic
• test mechanical products or equipment
• understand technical operating, service or repair manuals
• use acetylene welding/cutting torch
• use arc welding equipment
• use basic plumbing techniques
• use combination welding procedures
• use hand or power tools
• use pipe fitting equipment
• use pneumatic tools
• use precision measuring devices in mechanical repair work
• use precision measuring tools or equipment
• use pressure gauges
• use turnbuckle in structural repair or assembly work
• verify levelness or verticality, using level or plumb bob
• weld together metal parts, components, or structures