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58448932-Equipment-Piping-Layout - PIPING ENGINEERING CELL...

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PIPING ENGINEERING CELL EQUIPMENT AND PIPING LAYOUT T. N. GOPINATH 1.0 INTRODUCTION Equipment and Piping arrangements cannot be segregated to have different approaches since the requirements of equipment and piping layout design often overlap. Equipment is arranged in the process flow sequence in plan and elevation and piping is laid to effect the process flow. It is very appropriate to say that the Equipment and Piping layout design is an ART and not a SCIENCE. There is not a single formula available for the design of Equipment and Piping layout. The equipment layout design can be as rational as the mathematics of fluid flow but with the language of projective geometry. Mathematics is abstract; geometry is visual. All engineering courses have mathematics; few have the subject of projective geometry but none has layout design. However, systematic methods and procedures can be developed from engineering principles, specifications, practical engineering knowhow, and just SIMPLE COMMON SENSE. All this should be coupled with the capacity to visualize the arrangement of equipment and piping three dimensionally. The design must take constructibility, economics, safety, quality and operation into account. All these should be achieved within the shortest schedule and will demonstrate the technical capacity along with creative talent and common sense approach to problem solving. Although the tools to achieve these goals have changed from pencil and paper to computer graphics, the responsibilities of the Piping Engineer remains the same. During the planning stages, the Piping Engineer could meet with simple ideas that can effect substantial cost savings. Let us take a practical example to it. In a chemical process industry, a waste heat boiler had to be installed at the exhaust of a diesel engine to recover the waste heat. The job was awarded to a Consulting Engineering organization on a turnkey basis. The design activities took the following sequence. The process group worked out the required parameters, did the process design of the heat exchanger and issued Process Data Sheet (PDS) to the Fabricated Equipment Group (FEG), who did the mechanical design and issued the drawing to the Piping Group. Piping Group located the heat exchanger and designed the inlet piping and also did the flexibility analysis of the same piping as it is subjected to high temperature. To save the equipment, an anchor was placed near the inlet nozzle with an expansion bellow. The data of the anchor loading was passed on the Structural Group, who designed a braced structure to take care of this. The total cost became prohibitive. At this point, a suggestion was made to turn the waste heat boiler upside down and thus eliminating the heavy structure. The final design turned out to be simple, cost effective and occupied less space. (Refer Fig. 1.1a, 1.1b) Equipment and Piping Layout 1
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PIPING ENGINEERING CELL Fig. 1.1a, 1.1b 2.0 STEPS IN PLANT DESIGN The mechanical design and development
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58448932-Equipment-Piping-Layout - PIPING ENGINEERING CELL...

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