Steam in Dairy Processing — Complete Technical Guide

Why Steam is Critical in Dairy Plants

Steam is the primary heat transfer medium in dairy processing. It is used for:

• Pasteurization — HTST and LTLT processes
• Sterilization — UHT processing at 135–150°C
• Evaporation — concentrating milk, making condensed milk
• Cleaning (CIP) — hot water generation, sterilization of pipelines
• Packaging — carton sterilization (H₂O₂ + steam)
• Tank jacketing — maintaining product temperature

Types of Steam Used in Dairy

1. Saturated Steam

• Most common in dairy plants
• Steam at its boiling point for a given pressure
• Contains maximum heat energy for condensation
• Used for indirect heating (PHE, jacket heating)

2. Superheated Steam

• Heated beyond saturation point
• Drier, higher temperature
• Used for direct injection in UHT processing

3. Culinary Steam

• Food-grade steam for direct contact with products
• No pipe corrosion inhibitors or chemical additives
• Required for direct steam injection processes

Steam Properties at Common Pressures

Steam Consumption Calculation

Steam Required (kg) = Mass × Specific Heat × ΔT / Latent Heat

For indirect heating with efficiency factor: Actual Steam = Theoretical Steam / Heat Exchanger Efficiency

Steam Trap Selection

Steam traps remove condensate without letting steam escape. Wrong traps = wasted steam.

Energy Saving Tips

1. Insulate all steam lines — bare 2″ pipe loses ~110 W/m at 5 bar
2. Fix steam leaks immediately — a 3mm hole at 5 bar loses ~50 kg/hour
3. Test steam traps quarterly — 15–25% of traps fail open in most plants
4. Use condensate return — hot condensate (90°C+) saves feed water energy
5. Optimize boiler pressure — run at minimum required pressure

→ Use our Steam Requirement Calculator to calculate steam needed for your process.