A professional who tends machine that prints identification data on fabricated pipe. Responsibilities include:

• Positions and secures type in holder on printing machine, using handtools.
• Examines test impression to ensure printing of specified information, such as heat and lot numbers; size, gauge, and grade of pipe; and shift and initials of welder.
• Turns dial on number printer that prints designated consecutive number on each pipe in turn.
• Monitors and adjusts printer to maintain clarity of print.
• Cleans printing machine, using solvents and rags.