Elevating Hygienic Standards in Dairy Processing

Engineering cleanability into every weld, surface, and vessel geometry for food-safe equipment that performs batch after batch
A dairy processor partnered with Spokane Stainless Technologies to replace aging, difficult-to-clean vessels with equipment engineered for hygienic performance from the ground up. SST delivered sanitary vessels that shortened cleaning cycles, improved swab test consistency, and transformed audit preparation from equipment defense into capability showcase.

Project Overview

Client Name: Confidential Dairy Processor

Industry: Food & Beverage / Dairy Processing

Location: Pacific Northwest, United States

Project Scope: Design and fabricate hygienic stainless steel vessels to replace legacy equipment with sanitation deficiencies, eliminating cleaning dead zones and enabling reliable CIP performance across expanded production capacity.

Solution Provided: Spokane Stainless Technologies engineered and delivered custom sanitary vessels built from 304L/316L stainless steel with product contact surfaces finished to 32 µin Ra or better, full-penetration interior welds ground and polished flush, optimized tank geometry for complete drainage, and every port positioned for CIP access—all verified by SST’s in-house quality inspector.

The Challenge

Food and beverage processors face constant scrutiny from auditors, customers, and regulators. Equipment must be cleaned thoroughly, sanitized reliably, and maintained without contamination risk—consequences of failure range from failed inspections to product recalls.

This processor had inherited vessels built to older standards: internal crevices trapping product, rough weld finishes harboring bacteria, and geometries creating dead zones beyond the reach of cleaning solutions. These deficiencies surfaced in swab tests, extended CIP cycles, and sanitation efforts that demanded far more labor than necessary.

With capacity expansion on the horizon, replicating existing design flaws would scale the sanitation burden alongside production volume. The choice was clear: continue working around limitations or invest in equipment engineered for cleanability from the start.

The Solution

SST applied hygienic design principles at every stage—material selection, weld finish, drainage slope—treating sanitary compliance as the engineering foundation rather than a finishing step. The custom dairy vessels featured:

  • Top-mounted agitators with bottom sweep blades, eliminating sanitation dead zones
  • Welded spray balls only—no spring clips that create cleaning shadows
  • Flush-mount instrumentation ports maintaining interior surface continuity
  • 16”x20” manways with aseptic sampling ports for inspection access
  • Anti-syphon vent design meeting 3-A dairy standards
  • Full-penetration interior welds, ground and polished flush, verified by SST’s in-house inspector
  • Sloped tank geometry for complete drainage with every port positioned for CIP access

This transformed sanitation from a workaround-dependent process into a reliable, repeatable operation—equipment proven clean, batch after batch.

The Results

Key performance indicators highlighting project success:

  • Shortened CIP cycle times through optimized spray coverage and drainage
  • Reduced manual cleaning intervention and re-work
  • Improved swab test consistency and audit readiness
  • 3-A and FDA compliance built into every fabrication decision
  • Extended equipment service life through corrosion-resistant material selection
  • Lower total cost of sanitation over the vessel’s operating lifetime
  • Customer visits transformed from explaining limitations to showcasing capability

The success reinforced a core lesson: hygienic design requires understanding the entire cleaning process, not just the equipment surface. How CIP solution flows, where turbulence creates gaps, how operators inspect what they cannot see—these questions shaped fabrication decisions invisible in the finished product but defining its performance for years. By engineering cleanability into every detail, SST transformed sanitation from a recurring struggle into routine operation.

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