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Surface finishing of large storage tanks represents a typical area in which construction automation techniques can yield significant improvements over conventional methods. Current techniques are costly and laborious, and they expose workers to significant health and safety risks. Automation offers potential improvements in each of these areas and is well suited to the large, uniform surfaces of the tank wall. The University of Texas has developed a prototype automated surface finishing system for use on large diameter tanks. This system uses a computer-controlled motion module to refinish the vertical exterior walls of a tank. The module is configurable for both blasting and painting and utilizes conventional surface finishing equipment for these processes. The University of Texas' automated paint sprayer was field tested in January, 1992 at an Amoco pipeline facility in Alvin, Texas. These tests, which were used to demonstrate automation techniques to members of the construction community, are described in this paper. The successes of the system are reported along with the problems, and recommendations are given for improving the system. An economic analysis is presented along with future plans for the system.

Field Testing of an Automated Surface Finishing System for Large Diameter Storage Tanks