BS EN 61285:1995 Industrial-process control. Safety of analyser houses
Withdrawn
Printed version of this is available at library. To request, please e-mail to referencepk@usm.my and include a copy of this record in your e-mail.
This International Standard describes the physical requirements for the safe operation of the process analyser measuring system installed in an analyser house (AH) in order to ensure its protection against fire, explosion and health hazards.
Clause 4 addresses the location of the analyser house and connection within the process plant areas.
Clause 5 addresses the design, construction and layout of the analyser house. It does not address parts of the analyser measuring system installed in other locations such as sample conditioning rooms (SCR) or switchgear rooms.
Clause 6 addresses measures for reducing the danger of explosion for analyser houses whilepermitting maintenance of equipment with the power on and the case open.
NOTE - For most fluids, the major constraint is that the concentration of vapours, which are hazardous for personnel, is lower than the lower explosive (flammable) limit (LEL) (see clause 7).
Using n-Pentane as an example, the LEL is 1,4 % or 14 000 ppm. The level immediately dangerous to life or health which is the maximum level from which a worker could escape within 30 min without any escape-impairing symptoms or any irreversible health effects is only 0,5 % or 5 000 ppm.
ICS 71.040.10 Chemical laboratories. Laboratory equipment
Language:
English
Subject Keywords:
Chemical analysis and testing; Safety; Hazards; Health and safety requirements; Safety measures; Design; Safety engineering; Hazard prevention in buildings; Explosive atmospheres; Marking; Process control; Automatic control systems; Instrumental methods of analysis; Leakage paths; Fire safety in buildings
