Layout compressor piping

Space needs to be provided for the auxiliaries, including the lube oil and seal systems, lube oil cooler, intercoolers, and pulsation dampeners. A control panel or console is usually provided as part of the local console. This panel contains instmments that provide the necessary information for start-up and shutdown, and should also include warning and trouble lights. Access must be provided for motor repair and ultimate replacement needs to be considered. If a steam turbine is used, a surface condenser is probably required with a vacuum system to increase the efficiency. AH these additional systems need to be considered in the layout and spacing. In addition, room for pulsation dampeners required between stages has to be included. Aftercoolers may also be required with knockout dmms. Reference 8 describes the requirements of compressor layouts and provides many useful piping hints. 

The cylinders are arranged on the main frame of the compressor to provide balanced crankshaft power loading (when possible), access for maintenance, piping convenience, and floor space to suit plant layout. Common designations by position of the cylinder are... 

Road access is essential for exchanger bundle removal, for tower tray removal, to pumps, for catalyst loading and removal, for crane access to compressors, etc. It is advisable to study the piping layout from this standpoint. Remember that roads... 

Figure 7-6 shows a plan of the feed gas compressor area for a 200,000 tons per year ethylene unit. Main pipe runs are also shown. It is an In-Line-Layout with equipment in process flow sequence. The large diameter gas lines directly interconnect process equipment. On the complete plot plan, equipment (including compressors) is arranged on both sides of a central yard in process flow sequence. Pumps are located at their point of suction and are lined up under the yard. A parallel road is arranged to every line of equipment for convenient construction and maintenance access. 

Figure 7-128. Example piping layout to compressor nozzle.

Some concluding comments on piping layout for pumps and compressors... 

Vendor data Ail purchased equipment and specialty bulk items (e.g., pumps, compressors, air coolers, furnaces, control and safety v ves, level instruments, strainers, and silencers) require preliminary vendor drawings for the development of piping layouts. Final tonified drawings are usually not required until the detail phase. 

An example of cost-effeaiveness is the layout of steam-driven gas compressors. Although a grade-mounted installation is initially less expensive to install, maintenance on such arrangements often requires the dismantling of all major piping systems. This can prolong plant downtime and translates into lost revenue for the client. Careful consideration should be given to all factors before the initially lowest-cost solution is chosen. 

The arrangement illustrated in Exhibit 4-28 is for an elevated multicompressor structure it can be equipped with a curtain wall or totally enclosed. A clear area must be planned early in the layout stage to permit any machine to be maintained without disturbing the piping or components of the other compressors. The maintenance sequence for a multicompres-... 

To streamline the high-pressure, high-temperature steam inlet piping to the turbine, the plant layout designer should review the compressor outline drawing to locate the neutral axis, At this point, the turbine is anchored to the steel frame. As depicted in Exhibit... 

During the preparation it was necessary to structure, choose the methods, and collect all the data and information available in the project, with applicability to the study. The data collected and subject to use, was previously sent for licensing purposes, to the DRE (Direqao Regional de Economia) and was composed by the main Piping and instrumentations diagram (P ID), the general layout and all particular specifications of pumps, compressor, tanks, valves and pipes. 

Plant design and layout Predominant wind directions can dramatically affect the compressor fouling type and rates. Orientation and elevation of air inlet suctions must be considered together with the location of air/water cooling towers in a combined cycle plant, the possibihty of exhaust gas recirculation into the air inlet, orientation of exhaust pipes from lube oil tank vapor extractors, as well as with other local and specific sources of contaminants such as location of highways, industries, seashores, etc. 

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