IEC 60079-17:2013

Overview

IEC 60079-17:2013 is an international standard published by the International Electrotechnical Commission (IEC) focused on the inspection and maintenance of electrical installations in explosive atmospheres. This 5th edition replaces the 2007 version and introduces key technical revisions to enhance safety and compliance within hazardous areas where flammable gases, vapours, mists, dusts, fibres, or flyings may be present.

The standard applies specifically to inspection and maintenance activities, ensuring electrical installations in hazardous locations operate reliably without becoming ignition sources. It supplements IEC 60364-6, targeting environments at risk of explosive gas or dust mixtures under normal atmospheric conditions. Notably, it excludes underground mining, pyrophoric substances, and explosive dusts that do not require atmospheric oxygen.

Key Topics

• Scope and Application: IEC 60079-17 addresses inspection and maintenance procedures for electrical installations in hazardous areas classified by explosive atmospheres created by flammable gases, vapours, mists, dusts, fibres, or flyings. It excludes equipment verification, repair, and reclamation covered by IEC 60079-19.

• Inspection Procedures: The standard defines different types and grades of inspections, highlighting the importance of periodic and continuous supervision by skilled personnel. This ensures hazards are managed effectively and installations remain safe throughout their operational lifecycle.

• Documentation and Qualifications: Thorough documentation is required for inspection and maintenance activities. Personnel involved must hold appropriate knowledge, skills, and competencies as outlined in annexes, helping organizations maintain compliance and operational integrity.

• Specific Protection Types: IEC 60079-17 includes tailored inspection schedules for various explosion protection methods:

  • Flameproof enclosures (type “d”)
  • Increased safety (type “e”)
  • Intrinsic safety (type “i”)
  • Pressurized enclosures (type “p” and “pD”)
  • Protection by enclosure (type “t” and “tD”)
  • Other methods such as encapsulation, oil immersion, optical radiation, and powder filling.

• Maintenance Requirements: Guidance covers remedial actions, isolation of equipment, maintenance of flexible cables, earthing and bonding, environmental considerations, and proper tools and fastenings.

• Fitness-for-Purpose: Annexes provide frameworks for assessing the fitness-for-purpose of equipment, supporting decisions on the suitability and safety of electrical installations within explosive atmospheres.

Applications

IEC 60079-17:2013 is essential for industries where hazardous areas exist due to the presence of explosive gases or dusts. Common applications include:

• Oil and gas processing facilities
• Chemical and petrochemical plants
• Pharmaceutical manufacturing environments
• Grain handling and storage facilities
• Paint and solvent manufacturing
• Mining operations (excluding underground coal mining areas)
• Any facilities managing flammable atmospheres requiring robust electrical installation inspection protocols

Organizations implementing IEC 60079-17 benefit from reduced ignition risks, compliance with international safety regulations, and improved reliability of electrical systems within hazardous locations.

Related Standards

To ensure comprehensive safety management and compliance, IEC 60079-17 should be used in conjunction with related standards such as:

• IEC 60364-6: Electrical installations – Inspection and testing, which governs general inspection principles.
• IEC 60079-14: Electrical installations design, selection, and erection for explosive atmospheres, providing initial installation inspection guidance.
• IEC 60079-19: Repair and reclamation of electrical equipment for hazardous areas.
• IEC 60079 series: Covering various protection types and design requirements for electrical equipment in explosive atmospheres.
• IEC 61241 series: Pertaining to equipment for use in combustible dust atmospheres.

Adhering to these standards ensures a holistic approach to electrical safety, covering installation design, inspection, maintenance, repair, and operational integrity.

Keywords: IEC 60079-17:2013, inspection and maintenance of electrical installations, explosive atmospheres, hazardous area electrical safety, flammable gases, combustible dust, electrical installation inspection, explosion protection, intrinsic safety, flameproof enclosure, hazardous locations compliance.