Dairy Equipment Forging
Dairy equipment must be cleanable to a standard where nothing remains after clean-in-place. Every crevice, every rough surface and every porous area is a place bacteria can survive.
Forged dairy equipment components — agitator shafts, homogeniser parts and sanitary fittings — must be cleanable by clean-in-place systems. Forged stainless with no porosity, polished to Ra 0.8 µm or better with generous radii and passivated, makes CIP effective.
- Materials
- SS 304, SS 316/316L
- Surface finish
- Ra 0.8 µm or better
- Treatment
- Pickled and passivated
- Handling
- Segregated from carbon steel
- Components
- Agitator shafts, valve parts, fittings
Dairy Equipment Forging at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Product contact surfaces polished to Ra 0.8 µm
- Pickled and passivated after machining
- Fully segregated stainless handling
- No porosity to harbour bacteria
Cleanability Is the Specification
Clean-in-place systems circulate cleaning solution without dismantling. That only works if every surface is reachable and smooth. Forged stainless with no porosity, polished to specified Ra values and with generous radii, is what makes CIP effective.
- No porosity to harbour bacteria
- Polished to Ra 0.8 µm or better
- Generous radii for CIP reach
- Passivated after machining
Milk Chemistry and Cleaning Chemicals
Milk itself is mildly corrosive, and CIP cycles use caustic and acid solutions at temperature. SS 304 handles most dairy service; SS 316 is specified where cleaning chemistry contains chlorides.
Clean-In-Place Drives the Design
Dairy plant is cleaned without being dismantled, so every product-contact surface must be reachable by circulating cleaning solution. That makes surface finish and generous radii functional requirements, and porosity unacceptable.
| Aspect | Typical position |
|---|---|
| Components | Agitator shafts, homogeniser parts, valve components, fittings |
| Materials | SS 304, SS 316, SS 316L |
| Contact surface finish | Ra 0.8 µm or better |
| Treatment | Pickled and passivated |
| Handling | Segregated from carbon steel |
Milk and Cleaning Chemistry Are Both Corrosive
Milk itself is mildly corrosive, and clean-in-place cycles use caustic and acid solutions at temperature. SS 304 handles most dairy service; where cleaning chemistry contains chlorides, SS 316 is the safer specification. Welded assemblies should use 316L to prevent sensitisation in the heat-affected zone.
People also ask
What is clean-in-place and why does it affect component design?
CIP circulates cleaning solution through the plant without dismantling it. Every surface must be reachable and smooth, so generous radii and polished finishes are functional requirements, not cosmetic ones.
Why does porosity matter in dairy equipment?
Pores harbour product residue and bacteria that cleaning cannot reach, creating a contamination source. Forged stainless has no porosity at all.
Is passivation necessary?
Yes, after machining. It restores the chromium oxide layer and removes free iron from the surface, preventing both corrosion and product contamination.
Topics covered on this page
- dairy equipment
- clean-in-place
- agitator shaft
- sanitary fitting
- passivation
- SS 316L
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Which stainless for dairy equipment?
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SS 304 for most dairy service; SS 316 where cleaning chemistry contains chlorides.
What surface finish is required?
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Ra 0.8 µm or better on product contact surfaces, followed by passivation.
How do you prevent contamination?
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Stainless is processed on fully segregated tooling and storage so no carbon steel transfer can occur.