EHEDG and 3-A are two hygienic-design systems for food machinery: EHEDG is European, 3-A is American, and each says how equipment must be built so that it can be cleaned and does not harbour contamination. Indian makers can build to either if you specify it, but a general claim of "food grade" does not mean that either was applied.
Food-safety law is set by your country's authority. Confirm what your regulator and your customers accept before you fix the specification.
What is EHEDG?
EHEDG is the European Hygienic Engineering and Design Group, a consortium of equipment makers, food companies and research bodies. It publishes guidelines and test methods for hygienic design, for example on cleanability, welds and seals.
EHEDG guidelines are not law. A manufacturer can have a component tested and certified against an EHEDG method, or can simply say its design follows the guidelines. Those are different claims, and you should ask which one applies.
What is 3-A Sanitary Standards?
3-A Sanitary Standards, Inc. is a US body that issues standards for dairy and other food equipment. Its 3-A Symbol can be used on equipment that has been through the authorisation process. The standards are common in dairy and liquid processing.
If your customers or your market expect 3-A, ask the maker whether the machine carries the symbol or only follows the design rules, and ask for the authorisation if it is claimed.
What does hygienic design mean in practice?
Whatever the standard, the same features keep appearing in the specification:
- Product-contact surfaces in suitable stainless steel, with smooth finish and no crevices. See SS304 versus SS316 for contact parts.
- Continuous, ground welds rather than rough or spot welds in contact areas.
- Radiused corners and no dead legs in pipes, so product does not stay behind.
- Food-grade seals and gaskets that match your product and cleaning chemicals.
- Drainable design and parts that come apart for cleaning without special tools.
How do Indian makers fit in?
Gujarat has a large base of food-machinery makers, described in food processing machinery in Gujarat. Many build good stainless equipment, but hygienic design is a discipline, not a material choice. Some will build to EHEDG or 3-A drawings when you ask. Others use the words loosely.
Put these in your purchase order: the standard you want applied, the grade of steel, the surface roughness of contact parts, the material certificates, and the right to inspect welds before dispatch. If the maker cannot show you earlier machines or drawings that follow the standard, treat the claim as unproven.
Cleaning is part of the design. Ask how the machine will be cleaned, whether in place or by dismantling, which chemicals and temperatures the seals will face, and how long cleaning should take. A machine that is hard to clean will be cleaned badly, whatever standard it claims to follow. Confirm your own authority's requirements too, since some markets set additional rules on materials in contact with food.
Next step
We find and audit food-machinery makers, check material certificates and weld finish, and supervise testing and loading. To get a hygienic-design spec built, book a free sourcing review.