This paper explores why the interiors surfaces of closed steel sections need not be painted to prevent oxidation. The result is substantial reduction of maintenance costs and the elimination of the need for man holes with removable covers. This is based on Researches of C.P. Larrabee.
IEEE/CSA Standard for Skin Effect Trace Heating of Pipelines, Vessels, Equipment, and Structures - General, Testing, Marking, and Documentation Requirements
IEEE/CSA Standard for Impedance Heating of Pipelines and Equipment - Application Guide for Design, Installation, Testing, Commissioning, and Maintenance
