CIP systems in the food industry

A CIP system (Cleaning In Place) is an automated cleaning system for hygienically designed process installations in the food industry. The system cleans product contact parts such as pipes, tanks, valves, pumps and heat exchangers without disassembly, with controlled parameters such as time, temperature, flow, concentration and turbulence.

CIP is essential due to:

• Strict food safety and hygiene requirements
• Prevention of microbiological contamination
• Allergen control
• Reproducible and validable cleaning processes
• Comply with HACCP, BRC, IFS and FSSC 22000

Cleaning effectiveness is determined by the Sinner circle:

• Time (contact duration)
• Temperature
• Chemistry (type and concentration of cleaning agent)
• Mechanical action (flow, speed, turbulence)

Optimization is a balance between these four factors.

Commonly used media are:

• Water (cold, warm, hot)
• Alkaline cleaners (e.g. NaOH for fats and proteins)
• Acidic cleaners (e.g. nitric or phosphoric acid for mineral deposits)
• Disinfectants (e.g., PAA or steam, if applicable)

The choice depends on product type and contamination. Get good advice in this area from your own hygiene partner.

Common configurations include:

• Single-use CIP (lost cleaning)
• Recovery CIP (reuse of lye and/or acid)
• Central Multi-Line CIP Systems
• Decentralized or satellite CIP for specific processes

The configuration affects water consumption, chemical consumption and complexity.

Sufficient turbulence is required for effective cleaning  :

• Typical ≥ 1.5–2.0 m/s in pipes
• Correct sizing of pumps and pipes is crucial
• Blind spots, long pipes and low flows reduce cleaning effectiveness

Hygienic design according to EHEDG is essential here.

CIP systems use sensors and automation, such as:

• Conductivity measurement (chemical concentration)
• Temperature sensors
• Flowmeters
• Pressure sensors
• PLC/SCADA control with recipes

All parameters are logged for traceability.

In the food industry, this is done through:

• Cleaning validation at commissioning
• Calibration sensors
• Periodic verification
• ATP measurements
• Microbiological swabs
• Spoelwateranalyse

Validation supports audits and quality assurance.

CIP is an important part of allergen management:

• Specific CIP recipes per product group
• Breakdown of allergens through oxidation
• Extended rinsing and cleaning steps
• Allergen Testing Verification
• Vastlegging in HACCP-procedures

Insufficient CIP can lead to cross-contamination.

Optimization can be achieved by:

• Reuse of final rinse water as pre-rinse water
• Recovery tanks for lye and acid
• Online conductivity control
• Heat recovery
• Data-analyse van CIP-logs

This reduces costs and environmental impact.

Typical material choices are:

• RVS 316L (product contact)
• EHEDG, 3A, FDA and EU 1935/2004 compliant seals
• NBR, EPDM, FKM of PTFE pakkingen
• Hygienic valves and connections

Choice of material affects lifespan and cleanability.

Common issues include:

• Insufficient flow or too low temperature
• Poor pipe design (dead zones)
• Wrong chemical concentrations
• Missing validation or documentation
• Overly complex CIP recipes without necessity

These lead to an increased risk of contamination, contamination and contamination.

Depending on application and market:

• EHEDG-richtlijnen
• HACCP
• BRC / IFS / FSSC 22000
• EU Regulation 852/2004
• Internal company standards

The CIP design must be adapted to this.

In most cases, yes, because of:

• Product specificity (fat, sugar, protein)
• Plant capacity and layout
• Allergens and product changeovers
• Integration with existing installations

We have standard modules that we can configure to customer requirements.