Cable industry is of the biggest industries using nitrogen on a large scale. Wire manufacturing and cable industry are industries which require constant supply of nitrogen. This industries use N2 gas for smooth running of their production processes. No doubt, use of nitrogen plant and generators in the cable industry is extensive. There is no more reliable source of obtaining industrial nitrogen than installing an onsite nitrogen plant.

And, nitrogen is one of the most abundantly found elements comprising 78% of earth’s atmosphere. As mentioned earlier, the inert gas is used wide variety of commercial applications. However, many companies are now finding it more beneficial to install their own nitrogen gas plants than sourcing the non-reactive gas from third-party suppliers.

Why wire makers and cable industry need nitrogen?

During the manufacturing of cables, it is but natural that air, humidity and oxygen molecules will go into the coating material and the wire upon coating. So the nitrogen gas is introduced in the coating material and the wire. This creates a closed nitrogen atmosphere thereby preventing oxidation.

We know that high tension cables (33 KV-210 KV) are made with the help of a process called nitrogen atmosphere curing. Better Deal Machineries Pvt. Ltd. is one of the leading nitrogen plant manufacturing companies supplying nitrogen plants. We have supplied nitrogen plants to various companies manufacturing cables in South America, Asia, Africa and Middle-East.

Earlier, the cable industry used steam curing of electrical cables. In this process there was no way to remove moisture completely.  As a result, the cable insulation was of poor quality because some moisture was always left inside the coating.

 Then, steam curing gave way to the dry nitrogen curing. Now we have hundreds of cable companies using nitrogen for manufacturing of high tension cables. However, this kind of curing requires constant supply of nitrogen at 12-18 bar pressure. Better Deal Machinery has been manufacturing and supplying high pressure nitrogen generators for over 35 years for catering to such needs.

 Nitrogen plants for cable industry are manufactured with the latest cryogenic technology. The plants can be set for generating nitrogen at a required pressure. And, the nitrogen gas generated in the nitrogen plant/generator is stored in high pressure tanks.

The storage tank is used for taking nitrogen for curing through an advanced pressure reducing valve. The tank will take care of fluctuating nitrogen requirements. And, it also provides high pressure nitrogen flow during purging. This application requires nitrogen to have purity of 99.9%. This level of N2 purity is deal for achieving perfect insulation.  We will discuss important aspects of curing of cables in the following sections:

Tempering of Copper wires

Manufacturing of copper wires needs tempering. It is required for increasing flexibility and resistance. The process uses nitrogen for tempering process. The inert gas is put inside the stove for stopping oxidation at high temperatures. No doubt nitrogen completely stops oxidation.

Cooling and heating

Nitrogen is used for cooling and heating.  Air conditioners and industrial cooling devices use copper pipes. For usage of copper wires, these devices must go through a leakage test in which we use nitrogen.

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For food businesses, it costs them money if their food deteriorates as it will fetch lower prices. Worse still, customers might not be willing buy food which has become rancid. Use of nitrogen is the only way to stop or slow down the deterioration of food and increase the integrity and freshness of food. Food-grade nitrogen is used in the food industry for food preservation.  Many nitrogen plants for food packaging are working incredibly for preserving the food from getting spoiled.

What is nitrogen food packaging?  

Packaging of food requires use of gaseous nitrogen with high purity up to 99.0%, which is considered ideal packaging.  It is used for keeping the food fresh with its freshness, integrity and taste remaining intact. There are other conditions as well that must be observed for ensuring effective nitrogen food packaging which are described hereunder:

• Oxygen concentration must never exceed 1%
• Carbon monoxide concentration must always remain below 10ppm and concentration of carbon dioxide must never exceed 300ppm.
• Moisture content must remain below 56ppm

 Why nitrogen is used in food packaging?

Nitrogen has got just the right chemical and physical properties making it perfect for processing for food. It is the right gas because being inert it does not react with the food materials which can affect aroma, integrity and taste of the food. And it is effective because it can displace oxygen and prevent oxidation stopping moisture and bacterial growth responsible for breakdown of food.

How nitrogen packaging system works?

Nitrogen food packaging works by using nitrogen for displacing oxygen from within the packing.  The process is also called MAP (modified atmosphere packaging). The food to be preserved must be placed in an unsealed wrapping with nitrogen introduced into it. This drives out oxygen –rich air and moisture present in the air.   Afterwards, the packaging is completely sealed trapping nitrogen inside making it oxidant poor so food would achieve longer shelf life.

How to get food grade nitrogen?

There are two ways of getting nitrogen supply either through subscribing nitrogen cylinders or by installing onsite nitrogen plant. Getting the supplies through cylinders also does the work for you but it costs you extra and delivery is erratic. On the other hand, installation of the N2 plant will give you access to uninterrupted supply of nitrogen some of which you would store for later use. It is most effective solution for ensuring constant supply of nitrogen.

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