A professional who tends machine that winds material, such as asbestos or felt paper around mandrel to form insulated pipe-covering. Responsibilities include:

• Places mandrel of designated size in winding jig and attaches end of sheet to mandrel.
• Turns mandrel wheel specified number of times to wind layers of liner, filler, and outer materials, such as adhesive coated asbestos, tar, corrugated and wool felt papers around mandrel.
• Cuts material from roll sheet, using knife.
• Lifts and turns mandrel to vertical position.
• Grasps and shakes tube to drop mandrel from center of tube.
• Stacks tubes on handtrucks and replaces mandrel in jig.
• May manually paste and wrap completed tube in canvas outer jacket.
• May tend machine that winds specified pattern of fiberglass filament around mandrel to produce tubular pipe.