EHEDG in food manufacturing

The EHEDG (European, Hygienic, Engineering & Design Group) supports safe hygienic engineering and design in all aspects of food manufacture. The EHEDG provides an exclusive forum for food processing equipment manufacturers, users and legislators to discuss issues concerning hygienic design and to stimulate food safety and quality. At Aspen Stainless we understand the importance of developing stainless steel plant equipment to support the strict hygiene standards outlined in the EHEDG for food and drink applications.

The EHEDG states ‘product contact surfaces must be easy to clean, non absorbent, and not present toxicological hazard by leaching of substances into foodstuffs. All surfaces must be resistant to the product and to all detergents and disinfectants under the full range of operating conditions’ – all drainage systems need to be designed so they blend perfectly with the cleaning protocol of the factory.

Hygienic design as outlined in the EHEDG includes:

  • Sharp corners are harder to clean, especially if they’re situated at a right angle or bend in the drainage. It’s harder to get into and to make contact with the entire surface and there’s a chance the corner won’t be properly cleaned. Therefore all corners should be rounded.
  • The equipment and pipework must be self-draining or drainable. These self-draining surfaces should always slope to one side with a minimum angle of 3°
  • Small voids can harbour bacteria which can build up, therefore lap joints must be avoided at all costs
  • Ensure all welds appear on flat areas only. This is because if your drainage is welded on a flat area then the manufacturer can ensure the weld is smoother and this eliminates small crevices, which again can harbour bacteria
  • Pickle passivated. The process used to restore the oxide layer that naturally occurs on stainless steel but is destroyed on welded joints and without the stainless steel creases. EHEDG. Doc.18 states that its essential for drainage to be fully pickle passivated. The layer ensures the stainless steel is corrosion resistant and contributes to the longevity of the drainage.
  • It’s important to remember the floor starts with the drainage and poor drainage equals poor flooring

At Aspen Stainless we understand that cleaning practices also play an important role in hygiene, employee safety and operational costs. Our drainage solutions provide durable, easy-to-clean surfaces to prevent the unnecessary pooling of water and other liquids. Aspen have been supplying standard and bespoke solutions to a number of key applications across the food manufacturing industry for over 30 years to meet the increased demand in hygienic performance.

If you have any further questions regarding our hygienic drainage solutions please email: for more information.

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