Cleans interiors of boilers, storage tanks, industrial processing tanks, kilns, and tank and refrigerator railroad cars to remove emulsion and incrustations, using shovels, squeegees, brooms, scrapers, hoses, water and solvents. Drains tanks, connects hoses to water or steam lines, and sprays walls, roofs, and bottom of tanks to flush residue, such as oil, acid, grease, and sludge through tank openings.