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Below is a brief description of the technical
specifications relating to the products
that Norcon develop. For further information, please contact
us.
Hazardous Area Classification
| Zone 0: | Zone in which an explosive atmosphere is continuously present, or is present for long periods. |
| Zone 1: | Zone in which a explosive atmosphere is likely to occur in normal operation. |
| Zone 2: | Zone in which a explosive atmosphere is likely to occur in normal operation, and if it occurs, it will exist only for a short time. |
| BS EN 60079-10:1996, classification of Hazardous Areas gives zone definition as shown above. Norcon flameproof enclosures can be used in Zone 1 or Zone 2 applications. | |
Gas Groups
| Representive Gas |
Group | Analysis of the energy required to ignite various gas/air mixture allows similar gases to be grouped together. Norcon manufactures flameproof enclosures for gas groups IIA, IIB and IIC. |
| Methane | I (mining) | |
| Propane IIA | (surface industry) | |
| Ethylene IIB | (surface industry) | |
| Hydrogen IIC | (surface industry) |
Temperature Classification
| Temp. Class. | Max. Surface Temp. |
Apparatus should be selected with a suitable temperature classification, i.e. the maximum surface temperature of the apparatus will not reach the igintion temperature of the hazardous atmosphere. Norcon's apparatus certificates are generally rated T6 (unless otherwise stated) and can therefore be used in all applications. Norcon also hold certification for elevated ambient temperature applications. Contact us for details |
|
| T1 | 450 C | ||
| T2 | 300 C | ||
| T3 | 200 C | ||
| T4 | 135 C | ||
| T5 | 100 C | ||
| T6 | 85 C |