A professional who repairs and maintains machinery and equipment used in compressing and liquefying gases, such as compressors, scrubbers, instrument panels, and electrical equipment, following blueprints, schematics, and maintenance manuals, using handtools, welding equipment, and testing instruments. Responsibilities include:

• Tests equipment to locate causes of trouble, using standard test meters.
• Dismantles equipment, using handtools and power tools.
• Welds, brazes, burns, and solders parts.
• Repairs and replaces pipes and equipment, using pipefitting tools.
• Repairs and adjusts instrument control panels, rectifiers, motors, switches, and other electrical equipment.
• Repacks compressors and pumps.
• May operate metalworking tools to make and repair parts.