Analyzer house

B. Damage by confined explosions due to accumulation and ignition of flammable mixtures arising from small process leaks, e.g., flammable gas buildup in analyzer houses, in enclosed drains, around submerged tanks... 

Enclosures, such as analyzer houses, providing a protective and temperature controlled atmosphere for the enclosed equipment or instruments may still warrant internal fire protection if the housed devices contain flammables or combustibles. 

The instrumentation used in at-line and online analysis differs from laboratory instrumentation in that it is rugged and dedicated to a particular task, i.e., continually monitoring the same process stream, whereas laboratory-based analytical instruments are usually used to determine many analytes. Process analyzers are usually installed in safe analyzer houses that are kept at a constant temperature and pressure and have air continually passed through them to... 

Locating all miscellaneous items (e,g, filters, silencers, and analyzer houses). 

Instnimeat ei ineering The plot plan is used to locate analyzer houses and cable trays, assist in the location of the main control house, and estimate bulk materials. 

Apart from building that house equipment (e.g., compressor houses), it is often necessary to position control houses, substations, analyzer houses, and operator shelters within the process unit battery limits. Administration buildings and warehouses are generally located away from process unit areas. Control houses and substations are usually located at the edge of the unit adjacent to a plant road, 50 ft (15,000 mm) from the operating equipment. As seen in Exhibit 3-24, analyzer houses and operator shelters should be located next to the equipment that they service. 

Another responsibility of the plant layout designer is to establish the location of the instrument cable trays and analyzer houses. Both items are coordinated with the instrument engineer during the early phase of the job. The main instrument cable runs are located either in elevated trays, generally in the pipe rack, or below ground in cable trenches. These requirements are dis-cu.ssed in Chapters 11 (Pipe Racks) and 13 (Underground Piping). 

Analyzer houses in today s facilities contain a wide range of instrumentation, including portable sampling devices, washing facilities, and sophisticated mass spectrometers. These structures can be as large as 200 sq ft and are often located in a controlled environment containing blowers and air-conditioning units. A typical analyzer house is shown in Exhibit 14-27. 

Transportation delays to pH electrodes in analyzer houses will exceed mixing time delays to such an extent that the increasing comfort of checking electrodes is offset by a decreasing comfort in checking trend recordings. 

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