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.

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. 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 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. 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. Clean pressure vessel equipment, using scrapers, wire brushes, and cleaning solvents. 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.

Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance. Building and Construction -- Knowledge of materials, methods, and the tools involved in the construction or repair of houses, buildings, or other structures such as highways and roads.

Repairing -- Repairing machines or systems using the needed tools. Installation -- Installing equipment, machines, wiring, or programs to meet specifications. Quality Control Analysis -- Conducting tests and inspections of products, services, or processes to evaluate quality or performance. Equipment Maintenance -- Performing routine maintenance on equipment and determining when and what kind of maintenance is needed. Troubleshooting -- Determining causes of operating errors and deciding what to do about it. Operation and Control -- Controlling operations of equipment or systems. Equipment Selection -- Determining the kind of tools and equipment needed to do a job. Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly. Reading Comprehension -- Understanding written sentences and paragraphs in work related documents.

Manual Dexterity -- The ability to quickly move your hand, your hand together with your arm, or your two hands to grasp, manipulate, or assemble objects. Static Strength -- The ability to exert maximum muscle force to lift, push, pull, or carry objects. Wrist-Finger Speed -- The ability to make fast, simple, repeated movements of the fingers, hands, and wrists. Finger Dexterity -- The ability to make precisely coordinated movements of the fingers of one or both hands to grasp, manipulate, or assemble very small objects. Visualization -- The ability to imagine how something will look after it is moved around or when its parts are moved or rearranged. Selective Attention -- The ability to concentrate on a task over a period of time without being distracted.

Repairing and Maintaining Mechanical Equipment -- Servicing, repairing, adjusting, and testing machines, devices, moving parts, and equipment that operate primarily on the basis of mechanical (not electronic) principles. Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Performing General Physical Activities -- Performing physical activities that require considerable use of your arms and legs and moving your whole body, such as climbing, lifting, balancing, walking, stooping, and handling of materials. Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources. Identifying Objects, Actions, and Events -- Identifying information by categorizing, estimating, recognizing differences or similarities, and detecting changes in circumstances or events. Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles).