How to Identify Hazardous Location Standards and Workplace Safety Regulations

Operating in hazardous locations requires stringent safety measures and an understanding of the standards and regulations that govern these environments. These standards ensure the safety of workers and the reliability of equipment.

In this blog, we’ll explore what defines hazardous location classifications, essential safety regulations, and the critical components of risk assessments to maintain safety in these high-risk areas.

What is a Hazardous Location Classification

Hazardous locations are classified based on the presence and concentration of flammable gases, vapors, and dust. This classification helps determine the appropriate safety measures and equipment required to mitigate risks.

(1) Class I, Division 1, Division 2

These classifications are used primarily in North America and are part of the NEC (National Electrical Code). Class I refers to locations with flammable gases or vapors. Division 1 includes areas where these substances are present during normal operations, while Division 2 covers areas where they are present only under abnormal conditions.

(2) Zone 0, Zone 1, Zone 2

This system, used internationally and in IECEx standards, categorizes areas based on the frequency and duration of the presence of explosive atmospheres. Zone 0 indicates a continuous presence, Zone 1 signifies a likely presence during normal operations, and Zone 2 implies a presence only during abnormal conditions.

Safety Regulations in Hazardous Areas

Compliance with safety regulations in hazardous locations is vital to prevent accidents and ensure operational continuity.

(1) IECEx standards

The International Electrotechnical Commission System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres (IECEx) provides a globally recognized certification system. It ensures that equipment used in hazardous locations meets stringent safety requirements.

(2) NEC hazardous locations

In the United States, the NEC sets the standards for electrical installations in hazardous locations. These standards help prevent fire and explosion risks by ensuring that equipment is suitable for specific environments.

(3) Comparison of IECEx and NEC

While both standards aim to ensure safety in hazardous locations, IECEx is internationally recognized, making it easier for manufacturers to market their products globally. In contrast, NEC standards are primarily used in North America.

Implementing Safety Measures

Ensuring safety in hazardous locations involves implementing various protective measures:

(1) Gas detection systems: These systems are crucial for detecting the presence of flammable gases and vapors, providing early warnings and preventing potential explosions.

(2) Dust ignition protection: In environments where combustible dust is present, specialized equipment and measures are necessary to prevent ignition and ensure safety.

(3) Industrial safety standards: Adhering to general safety standards in hazardous locations, such as those set by IECEx and NEC, is essential for maintaining a safe working environment.

Conducting Risk Assessment for Hazardous Locations

Conducting a thorough risk assessment is a fundamental part of ensuring safety in hazardous locations. This process involves:

  Identifying hazards: Determine potential sources of ignition and flammable substances present in the environment.

  Mitigation strategies: Develop and implement strategies to reduce or eliminate identified risks, such as using explosion-proof equipment and ensuring proper ventilation.

Using Intrinsically Safe Radios

Selecting the right intrinsically safe two-way radio mitigates risks and enhances on-site communication, emergency response, durability, and compliance with safety standards.

(1) PNC460U Intrinsically Safe Smart Device

The PNC460U is a UL913-certified intrinsically safe smart device with the capabilities of large-screen smartphone and push-to-talk over cellular (PoC) radio rolled into one. It provides purpose-built apps, instant PoC calls, video-based dispatch, and more to get things done in less time and with less hassle.

(2) HP78X UL913 Intrinsically Safe DMR Portable Two-way Radio

HP780 DMR digital explosion-proof radio is an intrinsically safe explosion-proof terminal specially designed by Hytera for energy and petrochemical, mining, fire emergency, airport and other industries. Provide safe, reliable and efficient communication services in harsh flammable and explosive environments.

(3) PT890Ex Intrinsically Safe TETRA Portable Radio

PT890Ex Intrinsically Safe TETRA Portable Radio features a secure design, durable body, and advanced ergonomics. PT890Ex provides clear and loud voice quality, extended working hours, and long-distance communication capabilities. Compliant with stringent IECEx explosion-proof standards, it holds IECEx international certifications. This design meets global explosion-proof certification standards, providing reliable safe communication for industries such as oil and gas, fire rescue, airports, manufacturing, and more.