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Safety of Analyser Houses - Hazardex 2016

Author : Peter Pergande – EEMUA

16 October 2015


**This paper will be presented at Hazardex 2016. Contact us for details of delegate packages & offers**

 

On-line process analysers are frequently grouped together and installed in enclosed walk-in environmentally controlled analyser houses to ensure optimum conditions for performance and maintenance. However, this creates some specific additional safety risks as flammable, toxic and potentially asphyxiating materials (process samples and utilities required by the analyser) continuously flow into an enclosed space where electrical equipment is operating and which plant personnel frequently need to enter for the checking and maintenance of the analysers.

The correct design and operation of the analyser house is essential to mitigate these risks. 


The paper covers the specific approaches and considerations used for the design of analyser houses to reduce the risks to acceptable levels. These include forced draft ventilation of the analyser house and limiting the flow of the hazardous materials into the analyser house to prevent the build-up of a potentially hazardous atmosphere inside. The paper discusses the specific design criteria, monitoring, alarms and operating procedures required to achieve this together with other mitigating steps that are used. 


The paper will also provide an overview of the International Standards and technical guidance publications that are available to help ensure the correct safety design and operation of analyser houses.  The electrical safety aspects are covered by the relevant electrical area classification standards. Additional analyser specific standards and technical guidance publications cover the toxic and asphyxiation aspects which are most often the more limiting case, specifically the IEC 61285 “Safety of Analyser Houses” Standard and the EEMUA Analyser Design and Installation Publications.       


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