Piping engineering flow diagrams

The piping designer needs three essential source documents engineering flow diagrams, nomenclature, and equipment elevations. These documents are usually furnished by the piping analyst. 

Figure 7-1 shows part of a typical engineering flow diagram. In addition to showing schematically the piping required, the engineering flow diagram also includes 1 the valves and control devices that will be required. 

Engineering flow diagrams do not present all the essential information for the piping designer. They do not include equipment elevations and insulation specifications, which may be obtained from the equipment elevation summary and from the nomenclature list. 

On the average-size process plant engineering flow diagram, there are approximately 1,500 separate pipe lines. Information on each of these lines is absolutely necessary for the piping designer. The information that must be shown on each line includes the size, the line specification showing... 

Prepare/supervise preparation of piping or mechanical flow diagram (or P and ID), with necessary preliminary sizing of all pipe lines, distillation equipment, pumps, compressors, etc., and representation of all instrumentation for detailing by instrument engineers. 

FIGURE 28.5 Flow diagram of the selected treatment system. (From Eroglu, V. and Erturk, F., in Handbook of Industrial Waste Treatment, Wang, L.K. and Wang, M.H.S., Eds, Marcel Dekker, New York, 1991, pp. 293-306 Eroglu, V., Topacik, D., and Ozturk, I., Wastewater Treatment Plant for Cayirova Pipe Factory, Environmental Engineering Department, Istanbul Technical University, Turkey, 1989. With permission.)... 

Selecting the correct pump requires a knowledge of the system in which the pump must operate. In the chemical process industries (CPI), the engineer should start from the process flow sheets and schematics such as piping and instrument diagrams. The engineer must determine... 

PID The Piping and Instrumentation Diagram (P ID) shows in detail all the equipment, how it is connected with piping, where and what type of instrumentation and valves are used, the location of temperature, pressure, level and flow controllers (and indicators). Further it will show all the safety devices and alarms. The PI Ds give a comprehensive overview over the plant or the unit and it is a common document for mechanical, process, and instrumentation engineers in the downstream activities [851]. 

The project engineering department furnishes the piping analyst special requirements for all utility and auxiliary systems which are not shown on the process flow diagram. 

Front-End Engineering Prepare process flow diagrams, piping and instrumentation... 

The process engineer has to specify the measuring and control tasks in the process flow diagram (PFD) or at the latest in the P I diagram ( piping and instrumentation diagram", P ID). 

The process flow diagram is known by its English acronym, PFD, but it is also known as a flowsheet. It is used by process engineers to indicate the relevant flows and equipment in a processing plant. Minor details are omitted, such as, for example, pipe diameters and heights from the floor. Generally, PFDs contain everything necessary to understand a process and are often accompanied by additional... 

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