explosive

ATEX Design: Working safely in explosive atmospheres

In chemical, pharmaceutical or oil and gas plants, the presence of flammable gases, vapours or dusts is not an exception, but a standard operating condition. Managing an area at risk of explosion involves not only selecting the right components, but also applying rigorous engineering standards to protect people’s lives and the integrity of assets. At ST2 Srl, compliance with the ATEX Directive is at the heart of our E&I design.

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Beyond component marking

Many people think that simply buying a sensor marked with the ‘Ex’ symbol is enough to comply with regulations. The reality is more complex: ST2’s ATEX engineering covers the entire system.

  • Zone Classification: We analyse the likelihood of explosive atmospheres occurring in order to correctly define the zones (0, 1, 2 or 20, 21, 22). An accurate classification prevents overspending on unnecessary protection or, worse still, underestimating a risk.
  • Verification of Intrinsically Safe (Ex-i) Loops: We meticulously calculate the electrical parameters (inductance and capacitance) to ensure that the energy in the circuit is never sufficient to trigger an explosion.
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Documentation: Your system’s ‘passport’

A safe system must also be a well-documented system. ST2 provides its customers with all the support they need to create and maintain the Technical File:

  • Tools and Certificates List: Collection and verification of all supplier documentation.
  • Verification calculations: Detailed reports demonstrating the compatibility between barriers, cables and field instruments.
  • Installation drawings: Diagrams clearly showing cable routes and sealing methods to prevent the spread of flames.

Training and Consultancy

We don’t just hand over the drawings. We support HSE managers and maintenance staff in understanding how to carry out work correctly on a certified system. A single screw that’s not tightened properly on an ‘Ex-d’ (explosion-proof) enclosure can compromise the safety of the entire system: we’re here to make sure that doesn’t happen.

ATEX safety should not be a barrier to productivity. With ST2 Srl’s engineering approach, explosion protection becomes an invisible yet robust part of your plant, allowing you to focus on production with the assurance that you are fully compliant with current regulations.

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