Industrial Piping and Equipment Estimating Manual
This edition of “Industrial Piping and Equipment Estimating Manual” provides the principles and techniques for estimating process piping and equipment. It is not a manual about estimating only. Estimating cannot precede without labor productivity and analysis. The manual begins with the introduction devoted to labor, productivity measurement, collection of historical data, estimating methods, and factors affecting construction labor productivity and impacts of overtime.
The direct craft man hours in this manual were determined from time and methods for the measurement of construction labor for field erection of process piping and equipment for industrial projects located throughout the country.
Then eight sections provide the estimate tables for process piping and equipment scopes of work, estimate man-hour tables and estimate sheets, and sample estimates and statistical applications.
The purpose of this manual is to provide a comprehensive and accurate method for compiling piping and equipment direct craft man-hour estimates for the following industrial facilities:
Combined Cycle Power Plant
Simple Cycle Power Plant
Refinery and Hydrogen Plant
This manual is intended for project managers, estimators, engineers and project field staff to prepare direct craft man-hour estimates for budgets, RFP’s, bid proposals, and field change orders. The principles and techniques for estimating process piping and equipment will allow the estimator to accurately determine the actual direct craft man hours, based on historical and quantitative data, for the complete field installation of mechanical equipment and piping for a given industrial facility.
The estimating methods in this manual will allow the experienced estimator to use the comparison method to estimate similarities and differences between proposed and previously installed equipment and the unit quantity method will be a final check on actual man hours compared to estimate man hours. The manual does not include cost and man hours for material, equipment usage, indirect craft and supervision, project staff, warehousing and storage, shop fabrication, overheads, and fee. The direct craft man hour estimate is the basis for the estimator to obtain the project schedule and the man hours and cost for indirect craft and supervision, project staff, construction equipment, material, subcontractors, mobilize and demobilize, site general conditions, overhead and fee. In addition, the estimator must determine all factors that will affect direct craft labor productivity and overtime impacts. Review of the Preface and Introduction will enable the estimator to understand labor productivity, productivity measurement, collection of historical data, estimating methods, and labor factors and loss due to labor productivity and overtime impacts. The sample estimates, in Section 8, will illustrate how to apply the estimate tables and sheets to prepare detailed direct craft estimates and the statistical applications to construction will provide the statistical methods to forecast man-hour analysis by graphical and analytical techniques.
To apply the principles and techniques, estimate man-hour tables and sheets, the estimator must be familiar with the introduction on the following pages and “Section 8: Sample Estimates and Statistical Applications to Construction.”
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