Non-Electric Explosive Atmosphere Standards
Non-Electrical equipment used in potentially explosive atmospheres, while not dangerous to the degree of their electrical counterparts, still pose a danger and necessitate that preventative precautions be taken. Starting with the methodology for the risk assessment of non-electrical equipment and components for use in potentially explosive atmospheres, and the basic method and requirements for non-electrical equipment protection, these standards go on to address several ways of protecting equipment, such as through various enclosures or by immersion.
BS EN ISO 80079-36:2016
Explosive atmospheres. Non-electrical equipment for explosive atmospheres. Basic method and requirements (British Standard)
ISO 80079-36:2016 specifies the basic method and requirements for design, construction, testing and marking of non-electrical Ex equipment, Ex Components, protective systems, devices and assembliesof these products that have their own potential ignition sources and are intended for use in explosive atmospheres. Hand tools and manually operated equipment without energy storage are excluded from the scope of this standard. This standard does not address the safety of static autonomous process equipment when it is not part of equipment referred to in this standard. This standard does not specify requirements for safety, other than those directly related to the risk of ignition which may then lead to an explosion. The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that equipment can be operated are:- temperature -20 C to 60 C;- pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); and- air with normal oxygen content, typically 21 % v/v. Such atmospheres can also exist inside the equipment. In addition, the external atmosphere can be drawn inside the equipment by natural breathing produced as a result of fluctuations in the equipment's internal operating pressure, and/or temperature. This part of ISO/IEC 80079 specifies the requirements for the design and construction of equipment, intended for explosive atmospheres in conformity with all Equipment Protection Levels (EPLs) of Group I, II and III. This standard supplements and modifies the general requirements of IEC 60079-0, as shown in Table 1 in the Scope of the document. Keywords: mechanical explosion protected equipment
BS EN 13463-2:2004
Non-electrical equipment for use in potentially explosive atmospheres. Protection by flow restricting enclosure "fr" (British Standard)
This European Standard specifies the requirements for the construction and testing of flow restricting enclosures for non-electrical equipment intended for use in potentially explosive atmospheres if the atmosphere outside the enclosure becomes explosive rarely and for short durations only. This standard supplements the requirements in EN 13463-1 the contents of which apply in full to equipment constructed in accordance with this standard. Equipment complying with this standard meets the requirements of Group II - Category 3 equipment. The type of ignition protection described in this standard is unsuitable for use in combination with another type of protection to produce equipment of any other category than category 3.
BS EN 13463-3:2005
Non-electrical equipment for use in potentially explosive atmospheres. Protection by flameproof enclosure 'd' (British Standard)
This EN contains requirements for the construction and testing of equipment with type of protection flameproof enclosure, intended for use in potentially explosive atmospheres.
BS EN ISO 80079-37:2016
Explosive atmospheres. Non-electrical equipment for explosive atmospheres. Non electrical type of protection constructional safety ôcö, control of ignition source ôbö, liquid immersion ôkö (British Standard)
ISO 80079-37:2016 specifies the requirements for the design and construction of non-electrical equipment, intended for use in explosive atmospheres, protected by the types of protection constructional safety "c", control of ignition source "b" and liquid immersion "k". This part of ISO/IEC 80079 supplements and modifies the requirements in ISO 80079-36. Where a requirement of this standard conflicts with the requirement of ISO 80079-36 the requirement of this standard takes precedence. Types of protection "c", "k" and "b" are not applicable for Group I, EPL Ma without additional protective precautions. The types of ignition protection described in the standard can be used either on their own or in combination with each other to meet the requirements for equipment of Group I, Group II, and Group III depending on the ignition hazard assessment in ISO 80079-36. Keywords: constructional safety "c", control of ignition source "b" and liquid immersion "k"
BS EN 15198:2007
Methodology for the risk assessment of non-electrical equipment and components for intended use in potentially explosive atmospheres (British Standard)
This European Standard specifies basic methodology used in achieving safety of equipment for intended use in potentially explosive atmospheres. The provisions specified in this European Standard are intended for the designer. It also specifies a strategy for standard makers. This European Standard specifies the procedure and information required to allow ignition risk assessment to be carried out for the design of equipment or component. This European Standard provides advice for a decision to be made for the categorisation of equipment but does not provide means to prove the conformity of equipment categories. In this procedure the following information is to be taken into account: a) Possible occurrence of an explosive atmosphere inside the equipment or component or penetrating the equipment or component from the outside (in normal operation or during malfunctions) and the amount of explosive atmosphere involved leading to possible explosion impact inside of the equipment or component; b) equipment or components surrounded by an explosive atmosphere (in normal operation or during malfunctions); c) equipment or components wholly or partly surrounded by an explosive atmosphere considering also any explosive atmosphere in connection (in normal operation or during malfunctions); d) presence and likelihood (effectiveness) of ignition sources. The final objective is designing and manufacturing equipment or components intended for use in potentially explosive atmospheres. For this purpose equipment or components if necessary shall be designed with adequate preventive and/or protective measures. This European Standard specifies neither specific methods of analysis associated with ignition risk assessment, nor specific requirements for a category of equipment. It describes the methodology of ignition risk assessment. (continued)
