NEWSLETTER - January 2010 - English

 

TECHNICAL TOPICS

The correct use of sealing fittings

A conduit system should be provided with sealing fittings, through which run the electrical conductors, outside each enclosure containing equipment that can spark.

Once completed the assembly, the sealing fitting must be completely sealed with a special resin in order to prevent that a possible explosion occurred inside the enclosure can be propagated to the whole system of interconnected pipes, causing a devastating explosion.

Too often in plants, the sealing fittings are open, not sealed or sealed incorrectly. Unfortunately, not all the installers have the sensitivity required, perhaps because they haven’t been correctly trained about the risks that can occur if the fittings are not sealed properly.

The article defines the proper way to fill the sealing fittings in order to ensure the safety of a plant.

 

PRODUCTS NEWS

Electro polishing for lighting fixtures protection cage

In order to continuously upgrade its products, Cortem Group decided to apply a new technique to polish the stainless steel protection cages of EV,EW, HI, EVF series lighting fixtures: the Electro polishing.

With this technique you can obtain surfaces that are:
- bright and resistant for long time
- resistant to corrosion
- passive towards the products with which it comes into contact
- smooth

Electro polishing is an electroplating in reverse. Instead of depositing a coating of another material on a surface, the electro polishing removes a surface layer, typically of a few microns; in this way, the metal dissolution occurs without a grain attack and without mechanical, thermal or chemical effects on the material.

The result of the Electro polishing process is a smooth surface in the micro-profile, while the macro-profile of the surfaces remains unaffected.

Thanks to Electro polishing, the lighting fixtures protection cage produced by Cortem Group have a superior brightening and reflective lighting, according to the high quality of Cortem Group lighting fixtures, that along with EJB junction boxes and other products, are known all over the world as point of reference of Cortem Group production.

 

NEWS

CEI, the Italian Electrotechnical Committee, retired CEI-UNEL tables

Burnt more than thirty years ago, CEI-UNEL tables have been a reference point for generations of manufacturers and installers for a proper planning and installation of fittings and electrical equipment for hazardous areas.

In the last years, with the evolution of law followed after the issue of the ATEX Directive 94/9/EC, the tables have become progressively obsolete and today are no longer the state of the art.

The IEC TC 31, therefore the last meeting on 17 December, decided to withdraw the existing tables and possibly in the near future to replenish the working groups, for their new issue.

During the Technical Committee n. 31 on December, 17th, 2009 decided to withdraw the existing tables and, probably, to re-establish in the next future the working groups in order to issue them again.

This is a piece of history of Italian law which disappears.

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