Discussion: “The Fouling and Cleaning of Surfaces in Unfired Heat Exchangers” (John, A., Loucks, C. M., Groom, C. H., Campobasso, J. J., Latham, Jr., Allen, Dougherty, P. F., Brooks, C. H., Butler, R. C., McCurdy, Jr., W. N., Weiland, Jr., J. H., McCay, R. C., Barnes, J. E., and Bethon, H. E., 1949, Trans. ASME, 71, pp. 825–869)

This report summarizes the proceedings of the panel discussion meeting of the Symposium on Folding and Cleaning of Heat Exchange Equipment. Fouling in water circuits, in steam power plants, in marine power plants, in the process industries, and the effect of fouling upon the design of equipment are covered by the papers of the panel leaders. Topics brought up during the general discussion include fouling by calcium-sulphate scale, the suitability of certain “cleanliness factors” used in marine-equipment specifications, the use of additives to reduce fouling by fuel oil, and the effect of manufacturing tolerances and design upon the rate of fouling.