NEW HEAT EXCHANGER INDEXES ADDED TO TABLE

Gerald L. Farrar Contributing Editor Changes are being made in the heat exchangers category of the Nelson-Farrar Itemized refining cost indexes table. On the basis of a refinery construction survey just completed, a new method for calculating the composite (overall) heat exchanger index has been adopted: New composite index (0.1)(CI) + (0.7)(CSI) + (0.2)(SSI) For comparison: Old composite index = (0.4077)(CI) + (0.5923)(CSI) where: CI = copper index = {cost of 1 copper admiralty shell}