In industry and in areas with risk of explosion Cortem Group, always careful about the evolution of new technologies, has designed the...
Cortem Group, always careful about the evolution of new technologies, has designed the EVL-60B and EVL-70B series floodlights with focused optics (typical angle 40°) and different colors suitable for different lighting needs as shown in Table 1.
Table 1- Available colors with EVL-60B and EVL-70B series lighting equipment
Typical 120/240/277 VAC
Typical 120/240/277 VAC
These colors may be used in plants with explosion hazard in order to give to operators a further element to recognize hazardous situations and to alert the security personnel in charge for the evacuation or for making safe a plant’s part affected by the unusual event.
For example, these floodlights can be used to advise, through their lighting, a specific event and a no-go area.
Nature, through colors, allows us to establish a communication relationship with the surrounding environment and, through our senses, the colors put us into contact with reality allowing us at the same time to convey messages that can express, depending on the circumstances, feelings, concepts and signals, sometimes up to create a real language.
The mental association code = color, promotes learning and memory and, for this reason, identifying colors are used in all commercial and industrial sectors, in order to recognize the components, both of process flux and electrical and electronic conditions, and for all matters concerning the safety of the operators responsible for the production and maintenance activities.
The coded use of color expresses defined characteristics (partly complying with the standards) and it’s assigned to it a specific meaning related to safety or to the identification of certain components and/or actions to be taken for keeping in operation the plant or for the occurrence of critical situations during an incorrect plant operation.
The aim of this dissertation is to highlight the several types of colors used in the engineering practice of a plant, with particular reference to the safety of electrical installations and machines.
Table 2 - Color of control devices (buttons)
Table 3 – Color of the signal lights
Table 4 - Color of light towers
The legislative references are the Legislative Decree 493/96 and the Directive 2014/27/ EU of the European Parliament and of the Council dated February, 26th 2014 amending the Directive 92/58/EEC, concerning the minimum requirements for security signals and safety in the workplace.
As reported in UNI 7543-1 standard and in the Legislative Decree 493/96, which calls for colors and safety signs to be used in order to prevent emergency situations in the workplace, the main definitions to be taken into account are the following:
The general meaning of color assigned to safety must be as specified in Table 5.
Table 5 – Meaning of colors
At the same time should be considered the standard ISO 3864 "Colors and safety signals" and IEC 80416-1 standard “Basic principles for graphical symbols for use on equipment - Part 1: Creation of graphical symbols for registration”.
The workers, to not compromise the achievement of the stated purposes, must observe to certain rules such as to not modify or remove, without authorization, the safety warning or control devices (Art. 5 of Legislative Decree 626/96).In plant engineering system, there are no regulations that, in this moment, may apply the use of new LED lighting technologies which, by their nature, are able to provide different colors respect to the color of the traditional filament, fluorescent and discharge lamps. Therefore, LED lighting fixtures would give an important further technical/informative support for critical situations that usually can occur during the processes in industrial plants both in safe zones and in those at risk of explosion.We conclude this brief discussion, hoping that our contribution could be an incentive for designers, in order to adopt all measures that can further enhance the concept of "SECURITY" in the management and maintenance of plants in general and, particularly, in those at risk of explosion and/or fire.