Specialist Surveys - Ex Inspection

Specialist Surveys - Ex Inspection

Electrical Equipment and Installation

UMC provides Ex-Electrical Inspection to ensure client’s compliance with all of the latest international standards, codes, regulations, practices and legal obligations, all the while ensuring your facility and/or MODU is safer and hazard free with regards to electrically induced explosive scenarios. Our inspections will result in a complete and comprehensive survey of all installed Electrical Ex equipment by our highly trained and experienced CompEx/IECEx certified engineers and electricians who have specialist experience in the inspection and compliance of electrical installations in potentially explosive atmospheres.

Mechanical Equipment and Installation

Today’s legislation (ATEX and DSEAR being two examples) also applies to mechanical equipment. Hence a detailed risk assessment is necessary to ensure that ignition risk due to mechanical equipment is adequately controlled in hazardous areas in  terms of  acceptable tolerable  safety limits and that the consequences of an ignition are reduced to an acceptable level. Inspection of mechanical equipment and ignition risk assessments will cover how to assess the ignition risk from existing mechanical (non-electrical) equipment operating in hazardous areas in accordance with relevant international standards including:

  • EN15198 – Methodology for the risk assessment of non-electrical equipment and components for intended use in potentially explosive atmospheres
  • ISO 80079-36:2016 – Explosive atmospheres – Part 36: Non-electrical equipment for explosive atmospheres – Basic method and requirements
  • EN 1127-1:2011 – Explosive atmospheres – Explosion prevention and protection – Part 1: Basic concepts and methodology

Hazardous Area Classification

Area classification presents the basis for the correct selection and installation of electrical and mechanical equipment and installation of protective systems intended for use in hazardous areas.

Area classification is usually based on the following:

  • Standards
  • Directives (regulations)
  • Guidelines (instructions) and recommendations
  • Experience, analysis and calculations relating to various disciplines (e.g. process technique, thermodynamics, fluid mechanics, chemistry, etc.)

Explosion protection

Explosion protection is of particular importance with regards to the safety of modern technologies and equipment in various industries. Explosions endanger assets, lives and the health of workers as a result of the uncontrolled effects of flame and pressure. For this reason, in order to establish a strategy for the prevention of explosions at the workplace, organizational measures have to be taken. One of the fundamental principles in the analysis of explosion protection is that all equipment (electrical and mechanical) in hazardous areas, is to be designed, manufactured, installed and maintained in a manner that ensures that it is not an effective ignition source.

Types of Inspection Survey             

  • Initial inspection is necessary to check that the selected type of protection and its installation is appropriate and approved for the hazardous area
  • Periodic inspection is a routine inspection carried out at pre-determined intervals. It applies to existing installations to verify that they are being maintained (the effects of deterioration and/or change are being monitored) within an appropriate specification for continued use. Please be advised the intervals between periodic inspections should not exceed three years. However it is recommended to carry out these surveys on a more frequent basis.

Protective Systems

Protective Systems are devices which are intended to halt incipient explosions immediately and/or to limit the effective range of an explosion. Examples of protective systems are as follows:

  • Flame arresters
  • Explosion relief systems (using for example bursting discs, vent panels, explosion doors etc.)
  • Extinguishing barriers
  • Explosion suppression systems


  • ISO 16852:2008 – Flame arresters – Performance requirements, test methods and limits for use
  • EN 14491:2012 – Dust explosion venting protective systems
  • EN 14797:2006 – Explosion venting devices
  • EN 15089:2009 – Explosion isolation systems
  • EN 14373:2005 – Explosion suppression systems