Equipment specification sheets

Early in the life of a project, information has not been developed to allow definitive cost estimates based on material takeoff and vendor quotes for equipment. Therefore, it is necessary to estimate the cost of a facility using shortcut methods. The first step is to develop or check flow-sheets, major equipment sizes, and specification sheets as described in earlier chapters. From the equipment specification sheets, the cost of each piece of equipment is estimated, using techniques discussed later. Once the major equipment cost has been estimated, the total battery limit plant cost can he quickly estimated using factors developed on a similar project. 

Examples of equipment specification sheets are given in Appendix G. 

FLOSHEET is part of a suite of programs called PROCEDE which has been developed for the efficient handling of all the information needed in process design. It aims to cover the complete process environment, using graphical user interfaces to facilitate the transfer of information, Preece et al. (1991). The equipment specification sheets given in Appendix G are from the PROCEDE package. 

Examples of equipment specification sheets are given in Appendix G. These specification sheets are referenced and used in examples throughout the book. Blank templates of these specification sheets are available in MS Excel format in the online material at http //books.elsevier.com/companions. Standard worksheets are also often used for calculations that are commonly repeated in design. 

Many of the calculations described in the book can be performed using spreadsheets. Templates of spreadsheet calculations and equipment specification sheets are available in Microsoft Excel format online and can be downloaded by all readers of this book from http //books.elsevier.com/companions. 

Fig. 2.9. DTD of an equipment specification sheet and corresponding classes in CLiP...

The first step in the procedure is to define the purpose, objectives, and scope of the study. The more precisely this is done, the more focused and relevant the committee discussions can be. The next step is to collect all relevant information on the process under consideration. This includes flow diagrams, process equipment specifications, nominal flows, etc. The procedure is highly dependent on the reflabiUty of this information. Efforts expended here are worthwhile. Many committees use the flow sheet as the central stmcture to organize thek discussions. 

As an example of this technique, the estimated equipment costs for a large coal gasification project have been correlated and programmed for a computer. Thus, it is vei7 easy to get the cost of any one piece, or of many pieces of equipment, for a coal gasification or hydrocarbon processing project once the specification sheets are completed. 

If the control valve size is critical to the overpressure protection of the downstream equipment, and must not be increased, then this is clearly noted in all relevant documentation (specification sheets, flow diagram, operating manual, etc.,) and a warning notice plate is welded to the valve body. In such cases, an actual check of the valve installed or purchased should be made during the startup review. 

For some purposes the addition of equipment specification and performance data on the flowsheets adjacent to the item is of value. In many cases though, this additional information makes the sheets difficult to read. The... 

Specification Sheet, Figure 4-55, can be used as a guide in summarizing and specifying conditions for this type of equipment. 

In order to establish the initial inquiry, a specification sheet similar to Figure 12-57 can be used. API Standard 617 also has a comprehensive data form and excellent performance and mechanical standards. In general all of the information on these sheets need not be given to the manufacturer, just the basic performance data and known specifications. The manufacturer is expected to complete the information as it applies to his equipment. A summary of the essential information is as follows ... 

The first step in establishing a database that defines the operating condition of each machine-train or production system is to generate an equipment information sheet (EIS) for each machine-train. The information sheet must contain all of the machine-specific data such as type of operation and information on all of the components that make up the machine-train. 

Standard specification sheets are normally used to transmit the information required for the detailed design, or purchase, of equipment items such as, heat exchangers, pumps, columns. 

In the detailed design stage, everything must be specified. Each phase of the preliminary design must now be done in much more detail. The flow sheets develop into piping and instrument diagrams. The duty requirements for a piece of equipment become a specification sheet. The layout drawings may be replaced by a scale model, and a construction bid or detailed cost estimate is obtained to verify the previous cost estimate. 

There are also two notable research institutes offering information that may assist the engineer in making out the specification sheets. One of these is the Heat Transfer Research Institute (HTRI). Its staff performs tests to optimize the design of heat-transfer equipment. This information is then encoded in computer programs, which are distributed to the companies that support the research. This means that the engineer s company must purchase a membership to obtain these data. The Fractionation Research Institute (FRI) is a similar institution that deals with the separation processes. 

Begin by cross-referencing obvious relationships. Perhaps SOPs can be linked directly to specifications, or equipment setup sheets in the batch record can be linked to the asset numbers of equipment. The most obvious relationship will be the easiest to start with. 

Perform equipment design. Collect the key equipment characteristics as specification sheets. 

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