IEC 60079 Ex Calculator

IEC 60079 Classification:

\[ Zone = f(Gas \ Group, \ Temperature \ Class, \ Protection \ Type) \]

Gas Group:

Temperature Class:

Protection Type:

Ex Rating:

Zone Classification:

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1. What is IEC 60079 Ex Rating?

The IEC 60079 standard specifies requirements for equipment used in explosive atmospheres. The Ex rating indicates the type of protection, gas group, and temperature class that equipment is certified for.

2. How Does the Calculator Work?

The calculator determines the appropriate zone classification and Ex rating based on:

\[ Zone = f(Gas \ Group, \ Temperature \ Class, \ Protection \ Type) \]

Where:

Gas Group — Classification of explosive gas (I, IIA, IIB, IIC)
Temperature Class — Maximum surface temperature (T1-T6)
Protection Type — Method of protection (Exd, Exe, Exi, etc.)

Explanation: The combination of these factors determines the hazardous area zone where the equipment can be safely used.

3. Importance of Ex Rating

Details: Proper equipment classification is critical for safety in hazardous areas where explosive atmospheres may occur. Using incorrectly rated equipment can lead to catastrophic explosions.

4. Using the Calculator

Tips: Select the appropriate gas group for your application, the required temperature class, and the protection type. The calculator will determine the Ex rating and zone classification.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between Zone 0, 1, and 2?
A: Zone 0 has continuous hazard, Zone 1 has occasional hazard, and Zone 2 has unlikely hazard under normal conditions.

Q2: How do I choose the right gas group?
A: This depends on the specific gases present. Group I is for mining (methane), while Groups IIA-C cover industrial applications with decreasing ignition energy requirements.

Q3: What temperature class should I use?
A: Choose a temperature class where the maximum surface temperature is below the autoignition temperature of the gas present.

Q4: What's the most common protection type?
A: Exd (flameproof) and Exi (intrinsic safety) are among the most common, but the best choice depends on the application and zone.

Q5: Is this calculator a substitute for certification?
A: No, this provides guidance only. All equipment must be properly certified by a notified body for use in hazardous areas.