Hazardous Area Classification as per IEC 60079-10-1

Hazardous area classification is the foundation for selecting and installing explosion-protected equipment in oil and gas facilities. In this video, we explain the basic principles of hazardous area classification for explosive gas atmospheres under IEC 60079-10-1. The classification process is not simply about drawing a fixed circle around equipment. It requires an engineering assessment of the flammable substance, process conditions, possible sources of release, grade of release, ventilation, gas dispersion, plant layout, and physical obstructions. This video covers: ✅ Why hazardous area classification is required✅ How potential sources of release are identified✅ Continuous, primary, and secondary grades of release✅ How ventilation and plant geometry affect gas dispersion✅ The meaning of Zone 0, Zone 1, and Zone 2✅ Why zone extent is not a universal fixed distance✅ The importance of multidisciplinary engineering assessment✅ Why classification drawings must be documented and kept current Key message: Hazardous area classification determines where an explosive gas atmosphere may occur, how likely it is to be present, and the type and extent of the hazardous zone. A simple way to remember the zone definitions: Zone 0: An explosive gas atmosphere is present continuously, frequently, or for long periods. Zone 1: An explosive gas atmosphere is likely to occur occasionally during normal operation. Zone 2: An explosive gas atmosphere is not likely to occur during normal operation and, if it occurs, is present only for a short period. The final zone type and extent depend on several factors, including: ● flammable material properties; ● release rate and opening size; ● process pressure and temperature; ● grade of release; ● ventilation effectiveness; ● gas or vapour density; ● plant congestion and enclosure; ● elevation, pits, and low points; ● operating conditions and equipment layout. Hazardous area classification should be completed and reviewed by competent personnel using relevant process data, site information, engineering drawings, applicable standards, and company requirements. This video is suitable for electrical engineers, instrument engineers, process engineers, maintenance teams, operations personnel, HSE professionals, hazardous area inspectors, and anyone learning about explosion protection in oil and gas facilities. Topic: IEC 60079-10-1 / Hazardous Area Classification / Explosive Gas Atmospheres / Zone 0 / Zone 1 / Zone 2 / Oil and Gas Safety Disclaimer: This video is intended for learning and general awareness only. It does not replace a formal hazardous area classification study. Always refer to the latest applicable standards, company procedures, process data, approved classification drawings, equipment certificates, and competent hazardous area professionals before making design, installation, inspection, maintenance, or operational decisions. Suggested Chapters 00:00 Introduction00:10 Purpose of hazardous area classification00:20 Understanding the flammable substance00:30 Identifying sources of release00:40 Grades of release00:50 Ventilation and gas dispersion01:00 Zone 0, Zone 1 and Zone 201:10 Determining zone extent01:20 Documentation and lifecycle review Hashtags #IEC60079 #HazardousArea #AreaClassification #Zone0 #Zone1 #Zone2 #ExplosionProtection #ExEquipment #OilAndGas #ElectricalSafety #ProcessSafety #IECEx #ATEX #Engineering #Instrumentation #SafetyLeadership #LearningIsVital #AIVideo Pinned Comment Hazardous area classification is often misunderstood as simply assigning a fixed distance around process equipment. The correct approach is broader: Identify the release source, understand the substance, determine the grade of release, assess ventilation and dispersion, then establish the zone type and extent. The result must be documented, reviewed, and updated whenever process conditions, equipment, ventilation, or plant layout change.