Food-grade and sanitary stainless fabrication

Sanitary fabrication builds tanks, conveyors, tables, and process piping that can be cleaned to a food-safety standard.

Five-step flow diagram of a typical food-grade stainless fabrication job: Hygienic design review, Stainless cut and form, Sanitary welding, Grind, polish, passivate, Inspect finish and welds.

Materials and processes

Mostly 304 and 316L stainless steel. Welds are ground and polished smooth, crevices are avoided, and surfaces are passivated so they resist corrosion and do not trap product.

Standards and certifications to know

3-A Sanitary Standards: voluntary hygienic design standards widely used for dairy and food processing equipment.
NSF/ANSI food equipment standards: used to certify commercial food equipment.
Surface finish (Ra): a measured roughness value buyers often specify for product-contact surfaces.

Questions to ask a shop

Has the shop built equipment to 3-A or NSF/ANSI requirements before?
How are product-contact welds finished and inspected?
Can it provide material test reports for the stainless used?
Does it passivate in-house or send parts out?

What drives cost

Stainless price, polishing labor, orbital or sanitary welding, and documentation drive cost. Polished finishes can take longer than the welding itself.

Metros with strong local demand

Questions

What should I look for in a food-grade stainless fabricator?

Relevant certifications, finished work similar to yours, the right equipment, and clear documentation. Start with: Has the shop built equipment to 3-A or NSF/ANSI requirements before?

Where is food-grade stainless fabrication concentrated?

On this site, these metros have strong local demand: Atlanta, GA, Buffalo, NY, Chicago, IL, Cincinnati, OH, Denver, CO, Green Bay, WI, Kansas City, MO, Minneapolis, MN, New York, NY, San Francisco Bay Area, CA, Seattle, WA.