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Technical articles

Questions and answers

Friday, 22 November 2019

Why are used different raw materials for the same type of product?

 

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Questions and answers

Friday, 25 October 2019

What are the types of gas or dust that influence the construction of electrical equipment for environments with danger of explosion?

There are many gaseous or powdery substances that influence the construction of the equipment.
 
The standards 60079-10-1 for gases and 60079-10-2 for powders treat them in a complete and exhaustive way but, for the purposes of a brief example, let’s see some examples of gases and powders and their characteristics.
 
We can see that, depending on the type of gas, there is a minimum specific ignition temperature, which can or cannot be associated with a marking and a temperature class.
 
Table 1 Gas 

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Discovering Cortem Group: the washing and painting department

Thursday, 24 October 2019 PDF icon Discovering Cortem Group: the washing and painting department
Cortem Group boasts a production process managed internally and consisting of a foundry department, a mechanical workshop, a carpentry department and a washing and painting department.
 
The tunnel washing system is used for washing and/or inter-process treatments or for washing and/or precision treatments before assembly, in particular:
 
  • for the degreasing of die-cast aluminum components in order to eliminate from their surface the fat and oily substances accumulated during their previous processing, thus preparing them for the painting phase;
  • for the treatment of manufactured products after the mechanical processing to increase their resistance to corrosion and to improve the adhesion of the coating.
 

The tunnel washing system of Cortem Group

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The use of grease in explosion-proof enclosures (Ex db) and in electrical fittings

Monday, 23 September 2019 PDF icon The use of grease in explosion-proof enclosures (Ex db) and in electrical fittings

1. The use of grease and O-ring gaskets to increase the IP rating

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August is the month of maintenance operations

Monday, 22 July 2019 PDF icon August is the month of maintenance operations
1. Introduction
 
August is usually the month of scheduled maintenance. During this month, the plants are shut down in order to check the efficiency and safety of machinery and equipment.
 
 
A regular maintenance is essential to maintain equipment, machineries and work environment safe and reliable. The lack of maintenance or improper maintenance operations can cause extremely dangerous situations, accidents and health problems. Maintenance itself, however, is a high-risk activity because some of the dangers arising from the nature of work.

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The use of the aluminium alloy in the production of explosion-proof electrical equipment

Wednesday, 19 June 2019 PDF icon the_use_of_aluminium_alloy_in_the_production_of_ex_products.pdf
1. Introduction
 
Today, we use many different materials for producing equipment and components designed for areas with a potentially explosive atmosphere. They can be basically classified in the table below. 
 
 
When choosing the best materials to be transformed into finished products, it is important to consider the limiting factors of nature.

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Prevention of explosions caused by dust accumulation on explosion-proof electrical equipment

Friday, 24 May 2019 PDF icon Prevention of explosions caused by dust accumulation on explosion-proof electrical equipment
The engineering companies operating in the petroleum, petrochemical, pharmaceutical, food sectors and also in all those areas where the maximum attention must be paid both to the dimensioning and to the maintenance problems of the plants, correctly select the types of equipment to be integrated into the production cycle and produce the documentation that, made available to the end user, provides precise indications on the management and the maintenance methods of these plants.

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Areas with risk of explosion: aircraft maintenance in Hangars

Wednesday, 17 April 2019 PDF icon Areas with risk of explosion: aircraft maintenance in Hangars
1. Introduction
 
Very often we think that the equipment designed for use in potentially explosive environments is exclusively intended to be installed in refineries and crude exploration or extraction platforms. In reality, analyzing in depth how many and which application sectors can be, we discover many other plant situations that need to safeguard people and things through the use of materials and equipment suitable for the specific purpose. One of these is the hangars in which aircraft are parked for routine and extraordinary maintenance activities.
 
2.

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Types of fossil and non-fossil fuels and the growth of LNG demand

Wednesday, 20 March 2019 PDF icon Types of fossil and non-fossil fuels and the growth of LNG demand
Natural gas, in the last century, has become one of the most widespread fuels on earth, but it is also known to all that climate change is a consequence deriving from the use of fossil fuels, among which also Natural Gas is included.
 
Fuels are divided into different basic product categories such as:
 
• Liquefied Natural Gas 
LNG is produced with a gas cooling and condensation process. The main component is methane, with a variable percentage between 90 and 99%, while the remaining part consists of butane, ethane and propane.
 
LNG, at temperatures above -112° C, is lighter than air and disperses quickly, not contaminating the ground.

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Machinery, Materials and electro-instrumental panels to be used in plants for food production

Monday, 25 February 2019 PDF icon Machinery, Materials and electro-instrumental panels to be used in plants for food production

In the food industry world, there are many problems related to the hygienic safety of production stations along the entire supply chain for the production and packaging of food products.

For these reasons, the utmost attention is paid to the choice and use of materials and equipment that will be used for the production cycle, from construction to the management and feeding of all equipment and/or machinery operated not directly by the operator.

The "MOCA" certification (Materials and Objects intended to come into Contact with Food) is dedicated to all producers of materials and objects that come into contact with food.

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