Thermogym 316L stainless steel coils meet all international food safety standards with 2.5% molybdenum content for enhanced acid resistance. The material demonstrates less than 0.01μg/cm²/week metal migration, compliant with 21 CFR 175.300, ensuring suitability for direct food zone applications. Electropolished to a 0.3μm Ra surface finish, our coils exceed the requirements of the NSF/3-A Sanitary Standard 01-2023. A controlled passivation process creates a dense chromium oxide barrier that protects against pitting and corrosion caused by citric and acetic acids commonly present in food production environments (pH 2–12).
Thermogym coils for commercial walk-in refrigeration units deliver ±0.5°C temperature uniformity down to -30°C. The all-stainless construction resists harsh conditions such as daily high-pressure washdowns (100 bar at 80°C), condensate exposure with wide pH ranges (2.5 to 11.5), and operation in 100% relative humidity environments. Laser-welded tube-to-tube joints eliminate gasket failures, a frequent issue in copper-based systems. Long-term field data confirms over 12 years of continuous service in meat processing plants—more than double the typical life expectancy of copper-aluminum coils.
Ideal for visible food merchandising, our coils are engineered to avoid copper-induced taste transfer and withstand display-specific challenges. They are fully resistant to mold growth at 85% relative humidity, and their surface integrity remains unaffected by prolonged exposure to UV lighting. Sized for standard 25mm tubing, these coils integrate easily into counters and salad bars while delivering heat transfer densities of 12–15 kW/m³. Mechanical fin attachment avoids soldering in food zones, eliminating contamination risks while ensuring thermal performance.
Our coils perform reliably in intensive thermal cycles and sanitation routines, including clean-in-place (CIP) using 4% sodium hydroxide at 80°C and subsequent 1% nitric acid rinses. They are steam-sterilizable up to 134°C for 30-minute cycles and can endure ozone sanitation at 0.5 ppm in continuous exposure scenarios. Compact coil units (100mm assemblies) fit seamlessly into pasteurizers, blast chillers, and dairy fermenters. After 10,000 operating hours, coils retain 91% of their original thermal performance, validated in third-party dairy processing trials.
The 316L electropolished surface achieves a 99.8% reduction in bacterial adhesion compared to copper, as verified with E. coli and Listeria monocytogenes. Coils comply with EHEDG Module 27 for hygienic cleanability and exhibit zero biofilm formation after six months of testing in FDA-audited baking facilities. Our orbital-welded circuits eliminate crevices and dead legs, facilitating complete drainage and compliance with USDA-FSIS 01-2023 protocols. The entire design ensures sanitary handling in ready-to-eat food environments.
Compared to copper-aluminum systems, stainless steel coils offer multiple hygiene and durability benefits:
a. They do not require protective coatings that may degrade or flake into food.
b. Coils withstand over ten times the number of high-temperature wash and chemical sanitation cycles.
c. Stainless steel systems average a 300% longer service life in high-humidity environments.
d. Galvanic corrosion between fin and tube components is eliminated.
e. Performance is maintained without annual recoating or treatment.
All Thermogym food-grade coils undergo validation under industry-recognized testing regimes, including:
• NSF/ANSI 51 certification for food contact materials • 3-A Sanitary Standard 01-03 approval • USDA Acceptance Letter 2100.1 documentation • EHEDG Document 8 design conformity
Thermogym stainless steel coils deliver unmatched performance and safety for food industry professionals. Designed to excel across a wide range of applications—from deep freeze storage to thermal sterilization—they reduce contamination risks while minimizing maintenance costs. By outperforming copper-aluminum systems in corrosion resistance, service life, and hygiene, they represent a long-term, sustainable investment. With over 100,000 stainless coils manufactured annually, Thermogym is the industry's trusted partner in hygienic thermal solutions.
Learn how stainless steel fins can further extend system life »