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Cost Engineering: Equipment Purchase Costs

By Thane Brown |

A methodology and examples for estimating equipment costs are presented Engineers have the responsibility to create projects having attractive returns on investment and to create economically sound designs — designs that produce high-quality, competitively priced products. This requires the technical and economic1 study of many different options. When doing studies, the design is usually not well defined, so one will often use factor methods for capital estimating. With these methods, one first determines the purchase cost of the equipment and multiplies that by a factor to determine the capital cost of a process or plant.2 The accuracy of factored estimates is usually good enough to produce high-quality decisions. Purchase cost data.This article presents up-to-date equipment purchase cost data for nine different types of process equipment. Agitators Air compressors Boilers Cooling towers Fans Heat exchangers Pressure vessels Pumps, centrifugal Tanks, storage The cost data are presented for each of these types of equipment in Figures 1–9 on p. 52. Each begins with a general specification. For example in Figure 2 (air compressors) the specification is: Centrifugal, rotary screw and reciprocating compressors that…
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