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Short-Cut Piping Costs

By Gael D. Ulrich and Palligarnai T. Vasudevan; University of New Hampshire |

    Engineers often need to predict the cost of piping and pipefitting associated with a process unit. Even though detailed prices are available, finding and organizing them takes time and costs money. For those needing a quick method of approximation (such as for a pre-design estimate), a short-cut piping cost method is presented in this article. For convenience and compactness, the relevant equations and data lists are superimposed on the same diagram as the base cost curves (p. 48). The method of the chart’s compilation and other background details are described below. Lindley and Floyd [1] reported detailed data for more than 30 types of piping in three diameters (2, 4 and 6 in., essentially equivalent to 5, 10 and 15 cm. nominal dia.) and two types of installation: 1. Simple straight runs such as those used to convey raw materials from storage to a process module 2. Complex systems such as the plumbing associated with a distillation column or heat exchanger That database is, no doubt, valued by many who prepare detailed definitive cost estimates. We likewise found it useful to construct our short-cut chart, which is applicable to the same set of piping sizes and materials.   Simple, straight pipe runs Consider…
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