Inert environment: What is it? Utility and how to work in it safely

June 2025

There are environments where mere contact with oxygen can trigger an undesired reaction: explosions, fires, corrosion, or even the degradation of a valuable product. In such cases, taking extra precautions is not enough. It is necessary to transform that environment, to control it completely. This is where the inert environment comes into play.

At Lagupres, we are continuously evolving to work safely under these types of conditions, but what is an inert environment? When is it used?

What is an inert environment?

An inert environment is one in which oxygen is eliminated, usually by means of a gas such as nitrogen. The objective is to prevent dangerous or undesired reactions such as combustion or oxidation, or simply to eliminate the risk of explosiveness.

It is, in short, a matter of creating a controlled atmosphere. A safe environment.

Sectors and interventions in an inert environment

At Lagupres, we carry out work in inert environments in sectors such as:

  • Petrochemical industry: catalyst handling, preparatory work prior to scheduled shutdowns, etc.
  • Power generation: suction of residues in boilers or silos with ATEX risk.
  • Chemical and pharmaceutical industry: inerting of lines prior to maintenance.

How is an intervention in an inert environment carried out?

Each intervention is custom-designed, because no industrial environment is the same. However, in general terms, the sequence is as follows:

Each intervention is custom-designed, because no industrial environment is the same. However, in general terms, the sequence is as follows:

1. Preliminary analysis of the environment

Before intervening, we conduct a detailed study of the type of product present, the chemical risks, and the layout of the space.

2. Controlled inerting

When the inerting process is completed, the atmosphere is continuously monitored using gas analysers in order to safely enter the equipment if necessary.

3. Entry into the interior

When the conditions are stable and safe, our team enters, equipped with semi-autonomous breathing apparatus (BA), flame-retardant suits, and ATEX-certified equipment. A Life Support System is used in conjunction with anti-panic helmets to ensure the safety of our personnel. A safety observer remains in constant communication. The entire process is monitored.

4. Execution of the work

Whether it involves suction, disassembly, cleaning, or catalyst removal, the work is carried out using specific techniques designed to minimise risks and time. We use pneumatic tools, inspection cameras, and dry-line suction systems.

5. Deinerting and verification

Once the work is completed, the inert gas is gradually removed.

Our guarantee: technical expertise, safety, and experience

Working in inert environments is not merely a matter of technical resources. It is, above all, a matter of preparation. That is why at Lagupres:

  • We have teams trained and certified in confined spaces, hazardous atmospheres, and the use of respiratory equipment.
  • We apply protocols validated by our Occupational Risk Prevention department and tailored to each client.
  • We use continuous and redundant gas monitoring, with automatic safety alarms.
  • And above all, we work with the accumulated experience of hundreds of interventions in critical facilities, applying specific measures according to the nature of each space and the requirements of the client.

Conclusion

Inert environments make it possible to intervene safely, without compromising processes or facilities.

At Lagupres, we turn every risk into a safe environment, with technical expertise, rigour, and precision.