Wesley Van Hill, global technical manager, and Kevin Wolf, assistant chief engineer at Intertek, discuss the implications of the transition for hazardous equipment certification

source (Ex b) and liquid immersion (Ex k). In addition to combining these considerations, the new standard includes: An additional method of ensuring lubrication is

present in moving parts requiring it. Additional information for brakes and their use Expanded requirements for maintaining

correct belt tension Further clarity on when Control of Ignition

Source “Ex b” is to be applied Requirement to mark equipment with “Ex h”

rather than “Ex b”, “Ex c”, or “Ex k” Manual details/information about which


t is important for manufacturers to address explosion safety risks for non-electrical

equipment intended for hazardous locations and explosive atmospheres. ISO and the IEC published standards for non-electrical equipment in hazardous locations, ISO 80079- 36 and -37 to better ensure compatibility and enhance the standards’ level. These two ISO standards have been adopted as European Normative (EN) standards and supersede the EN 13463 series of standards which have been withdrawn. Therefore, it is important to become familiar with the new standards.

TRANSITION OF EN 13463-1 TO EN ISO 80079-36 In 2008, the IECEx decided to transition to the ISO 80079 series, making it a global standard and bringing non-electrical requirements to the IECEx scheme. While there are several changes; generally, products that complied with the basic requirements of EN 13463-1 should meet the general requirements of EN ISO 80079-36 with a few updates in the design documentation. The changes include: Introduction of equipment protection levels

(EPLs) Ga/Gb/Gc and Da/Db/Dc, that align with IECEx requirements where EPLs are used instead of categories or zones. Introduction of dust groups IIIA/IIIB/IIIC, to

align with the requirements of EN IEC 60079-0. It is now required to be categorised depending on the equipment’s suitability for combustible flyings (IIIA), combustible flyings and non-conductive dust (IIIB) or combustible flyings, non-conductive dusts and conductive dust (IIIC). Manufacturers of ATEX Category 2 and 3 non-

electrical equipment will now be subject to quality system audits (QAR) if they wish to obtain certification under the IECEx scheme.

COMBINING EN 13463-5, EN 13463-6 AND EN 13463-8 INTO EN ISO 80079-37 The main protection concepts found in EN 13463 for assessing non-electrical equipment have been combined into EN ISO 80079-37. They cover construction safety (Ex c), control of ignition


protection concept has been applied, along with the necessary information for each concept In term of changes to protection concepts within

EN ISO 80079-37, as noted previously, the marking requirement has changed from “Ex b” (control of ignition source), “Ex c” (constructional safety) and “Ex k” (liquid immersion) to “Ex h”, for any or all of these considerations. EN ISO 80079-36 and EN ISO 80079-37 are now

harmonised for ATEX and IECEx, giving manufacturers the option to obtain dual certification without requiring additional testing. This adds quality assurance for all non-electrical certification and opens the door to other global certifications such as InMetro in Brazil, CCC in China, or TR CU in Russia. It is important to note that as of October 31,

2019, the EN 13463-series of standards will no longer provide a presumption of conformity to the ATEX Directive. At a minimum, manufacturers will need to conduct a gap analysis to the EN ISO 80079-36 and -37 standards and update their Declarations of Conformity accordingly. At a minimum, revised ignition hazard

assessment, instructions manual, and schedule

drawings are needed for updating the standards from EN 13463 to the EN ISO 80079-36 and EN ISO 80079-37 standards. If there are any changes in the product design, the certification body would need to reanalyse and/or retest the equipment based on the scope of revision. Under the new standard, ATEX certification

requirements for non-electrical equipment vary, depending on the zone the intended equipment will be used in. The variations include options for self-declaration, requirements for a Quality Assessment Notification (QAN) and more. They can be broken down in the following way: Zone 0: Manufacturers are not permitted to

self-declare their equipment; an EU Type-Exam Certificate and a QAN is required. Zone 1: Manufacturers are permitted to self-

declare non-electrical equipment provided they: assess to the new standard; complete an ignition hazard assessment; mitigate potential ignition sources that may be present during normal operation; construct a technical dossier with minimum criteria outlined and lodge with a Notified Body for a period of 10 years after the manufacture date; and keep an identical copy of the file in their quality system Zone 2: Manufacturers are permitted to

self-declare non-electrical equipment provided they: assess the equipment to the new standard; complete an ignition hazard assessment; mitigate potential ignition sources that may be present during normal operation; and construct a technical dossier with the minimum criteria outlined the standard and retain a copy of the file for a period of 10 years after the manufacture date

Intertek New tachometer application guide

BEKA associates have recently published a new Application Guide AG314 describing their extensive range of tachometers for use in safe and hazardous areas. The guide includes comparison tables to aid selection of the most suitable panel or field mounting model, plus a detailed description of how the instruments function. The guide also explains instrument configuration and includes practical configuration examples. This range of tachometers can operate with most common types of sensor including proximity detectors, voltage pulses and magnetic pick-offs. Configuration is simple and will be familiar to many users as it employs the same basic menu and terminology as all other BEKA instruments. In addition to the general purpose models,

Application Guide AG314 describes the internationally certified intrinsically safe Ex ia models which enable speed measurements to be

made in all gas and dust hazardous areas. For lower risk applications in Zone 2, the Ex nA certified models which can be installed without the need for a Zener barrier or a galvanic isolator are also included. The guide concludes with a description of

tachometer accessories including display backlights, alarm outputs, plus isolated pulse and 4/20mA outputs for retransmission applications. To read the guide please follow the link ication_guide_ag314.pdf, or to request a printed copy contact BEKA on 01462 438301.

BEKA associates


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