Скачать или смотреть Hazardous Area Classification – Why It Matters

In oil, gas, chemical, and power industries, not all areas are created equal.
Some are perfectly safe, while others carry a constant risk of explosion due to flammable gases, vapors, or dusts.

That’s where Hazardous Area Classification comes in.

👉 Two main systems in use:

IEC / ATEX (Zones)

Zone 0 → Continuous hazard

Zone 1 → Likely hazard in normal operation

Zone 2 → Hazard only under abnormal conditions

NEC (Classes & Divisions)

Class I → Gases & vapors

Class II → Dusts

Class III → Fibers & flyings

Division 1 → Hazard under normal conditions

Division 2 → Hazard only under abnormal conditions

👉 Gas & Dust Groups:

Class I: A (Acetylene), B (Hydrogen), C (Ethylene), D (Propane)

Class II: E (Metal dust), F (Coal), G (Grain/Flour)

IEC: IIA, IIB, IIC (gases) & IIIA–IIIC (dusts)

⚡ Why it matters:
Correct classification ensures the right Ex protection technique, IP rating, and equipment selection — preventing ignition and saving lives.

📌 Remember: A simple misclassification can lead to catastrophic failure.

💬 What’s your biggest challenge with Hazardous Area Classification — design clarity, documentation, or site compliance?

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