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Why coated sheet metal and plastic are not enough in the food industry: the choice of stainless steel

24 July 2025
Why coated sheet metal and plastic are not enough in the food industry: the choice of stainless steel

The food industry imposes hygienic and structural standards that electrical enclosures made of painted sheet metal or plastic cannot meet.

It is not just a question of aesthetics or durability: it is a regulatory, functional and food safety issue.

To avoid critical points along the production line, it is necessary to rely on electrical enclosures designed for high hygienic standards, made of AISI 304L or 316L stainless steel, such as those of the IRINOX Hygienic Line.

Hygiene: a requirement, not an option

In food & beverage production environments, every element installed near the working lines must prevent microbiological contamination and facilitate sanitization. The EHEDG (European Hygienic Engineering and Design Group) regulations and the HACCP (Hazard Analysis and Critical Control Points) self-monitoring system impose clear requirements:

  • Smooth, easily washable surfaces with no cavities or sharp edges
  • Materials resistant to aggressive detergents and high-pressure washing
  • Design that prevents water stagnation, dust accumulation, or organic residues

Standard electrical enclosures, often made of painted sheet metal or unsuitable steel, do not meet these conditions, putting the entire production process and the manufacturer's reputation at risk.

Why choose an AISI 304L or 316L stainless steel enclosure

Stainless steel is the material of choice for hygienic applications. IRINOX uses AISI 304L and 316L stainless steel, materials that:

  • Resist corrosion from detergents and acidic agents;
  • Withstand frequent washing at high temperatures and pressures;
  • Offer high durability even in humid or steam-saturated environments.

The choice between 304L and 316L depends on the level of aggressiveness of the installation environment: 316L is recommended in the presence of chlorinated or saline substances (e.g., fish, dairy, and meat industries).

Why painted sheet metal and plastic are not suitable for food & beverage

Materials such as painted sheet metal and plastic polymers are widely used in industry, but are not compatible with the hygiene and sanitation requirements of the food industry:

  • Paint can deteriorate with the use of detergents and high-pressure washing, exposing the underlying metal to corrosion.
  • Plastics tend to deform or crack, creating crevices where bacteria or residues can accumulate.
  • Sharp edges, non-watertight joints, and porous surfaces hinder daily cleaning operations.

The result? Risk of contamination, non-compliance with regulations, and failure to pass audits.

IRINOX solutions for the food industry

To provide concrete support to companies in the food & beverage industry, IRINOX has developed a dedicated line:

 

Designed in compliance with EHEDG guidelines, with models also equipped with DGUV hygiene certification, the IRINOX hygienic line stands out for:

  • 30° top angle for liquid drainage
  • Concealed hinges
  • FDA-compliant silicone seals
  • Latest generation hygienic locks in stainless steel with external seal
  • Satin finishes and continuous surfaces
  • Wide range of customizable internal accessories

 

IRINOX know-how: experience and real-life examples

We have been working for years with manufacturers of machinery and processing lines for food, beverages, dairy products, and processed products.

Discover some examples of projects we have completed for customers in the food industry:

 

Conclusions: food safety means dedicated design

Choosing the right electrical enclosure is not a matter of aesthetics, but a fundamental technical and regulatory choice. Relying on stainless steel solutions designed for food environments means guaranteeing hygiene, safety and durability over time, protecting production, consumers and the company.