Contamination risk, not corrosion alone, drives the specification here — hygienic design intent, crevice-free joints, and surface finish matter as much as the underlying material's corrosion resistance.
| Dominant Failure Mode | Crevice corrosion and contamination risk at the tube-to-sheet joint |
| Governing Standard | Hygienic design intent, food-contact material compliance |
| Typical Material Default | Stainless Steel 304 or 316L |
| Typical Structural Type | Fixed, with welded joints for full crevice elimination |
Hygienic design intent shapes joint method as much as material choice.
An expanded (non-welded) joint can create a microscopic crevice where fluid stagnates and contamination risk increases, regardless of how corrosion-resistant the base material is — welded joints eliminate that crevice directly.
304 is often adequate for mild food-contact service without significant chloride exposure from cleaning chemicals; 316L is preferred where more aggressive cleaning-in-place chemistries are used.
We can supply supporting material documentation; confirm your specific destination market's food-contact compliance requirement (e.g., FDA-adjacent, EU food contact) at enquiry stage.
Every enquiry is checked against governing code, material compatibility and manufacturing feasibility before a quote is issued. Use our product, material, grade and standards guides to freeze the RFQ — then confirm with engineering.
Send your fluid service, pressure class and governing standard — we'll confirm the right product and material.