IS/IEC 60079 (PART 11): 2023
Explosive Atmospheres – Equipment Protection by Intrinsic Safety "i"
summary
Equipment protection by Intrinsic Safety “i” refers to electrical and electronic devices designed to operate safely in explosive atmospheres by limiting energy (electrical and thermal) so that ignition of flammable gases, vapors, or dust cannot occur. Such equipment is widely used in oil & gas, chemical plants, mining, and hazardous industrial zones.
Why BIS Certificate is Mandatory for Explosive Atmospheres – Equipment Protection by Intrinsic Safety "i"
BIS certification is mandatory for intrinsically safe equipment to ensure safe operation in explosive atmospheres. These products are used in high-risk environments where sparks or excess heat can cause explosions. BIS standards verify energy limitation, circuit design, and safety integrity, protecting workers, facilities, and infrastructure while ensuring compliance with Indian safety regulations.
What is BIS Certified for Explosive Atmospheres – Equipment Protection by Intrinsic Safety "i"
The BIS certified specification defines technical and safety requirements for intrinsically safe equipment used in explosive atmospheres. It covers protection techniques, electrical parameters, temperature limits, fault conditions, testing methods, marking, and documentation. Compliance ensures the equipment meets Indian Standards aligned with IEC requirements for intrinsic safety “i”.
Test required for Explosive Atmospheres – Equipment Protection by Intrinsic Safety "i"
| Title | Mandatory/Optional |
|---|---|
| Routine verifications and tests | Required |
| Marking | Required |
| Apparatus Construction | Required |
| Enclosures | Required |
| Connection facilities for external circuits | Required |
| Internal connections and connectors | Required |
| Separation of conductive parts | Required |
| Encapsulation | Required |
| Dielectric strength requirements | Required |
| Rating of components on which intrinsic safety depends | Required |
| Resistors | Required |
| Capacitors | Required |
| Inductors and windings | Required |
| Semiconductors | Required |
| Transformers | Required |
| Relays | Required |
| Signal isolators | Required |
| Fuses | Required |
| Primary and secondary cells and batteries | Required |
| Piezoelecric devices | Required |
| Cells for the detection of gases | Required |
| Supercapacitors | Required |
| Thermal devices | Required |
| Mechanical switches | Required |
| Supplementary requirements for specific apparatus | Required |
| Type verifications and type tests | Optional |
| Spark ignition compliance | Optional |
| Thermal ignition compliance | Optional |
Benefits of BIS Certification for Explosive Atmospheres – Equipment Protection by Intrinsic Safety "i"
1. Explosion and Ignition Prevention
BIS certification ensures equipment is designed with strict energy-limiting principles, preventing sparks, overheating, or ignition sources in hazardous environments.
2. Enhanced Worker and Plant Safety
Certified intrinsically safe equipment reduces risks of accidents, explosions, and injuries, ensuring safer operations in oil, gas, chemical, and mining industries.
3. Compliance with Indian Safety Regulations
BIS certification is mandatory in India, enabling manufacturers and importers to legally supply equipment for use in explosive atmospheres without regulatory issues.
4. Reliability Under Fault Conditions
BIS standards require testing under normal and fault conditions, ensuring the equipment remains safe even during component failure or abnormal operation.
5. Improved Market Acceptance and Trust
BIS-marked intrinsically safe equipment gains higher acceptance among industrial users, EPC contractors, and government projects, enhancing brand credibility and competitiveness.