A professional who cleans and repairs aluminum-processing equipment, such as heaters, heat exchangers, evaporators, pipelines, pumps, cooler coils, and filter leaves, using handtools. Responsibilities include:

• Removes heads from heaters, evaporators, preheaters, and heat exchangers, using impact wrenches.
• Mixes acid or caustic with water and inhibiting chemicals to prepare cleaning solutions of specified concentrations.
• Tests solutions, using acid-testing equipment.
• Turns valves to circulate cleaning agents through equipment for time indicated by test results.
• Washes vessels and heaters with water.
• Removes scale from tubes, using air-powered turbines and drills.
• Examines vessels or heaters for leaks, and marks defective areas.
• Reassembles vessels and heaters, using chain falls, block and tackle, impact wrenches, and handtools.
• Lubricates valves and adjusts packing glands to prevent leaks.
• May keep records of repairs and test results.