What is a CIP system and how does it work? Definition, stages, standards 2026

CIP system (Cleaning in Place) — definition: A CIP system cleans piping, reactors and process equipment without disassembly, via controlled liquid circulation. Essential for GMP Annex 1 (2022), EHEDG Doc. 8, FSMA and HACCP compliance — at least 30–50% shorter cleaning time versus manual cleaning, demonstrable via MACO calculation and ATP swab test (<10 RLU).

CIP system key points

• Standards: EHEDG Doc. 8 & 37, GMP Annex 1 (2022), FDA 21 CFR Part 211, FSMA, EN ISO 14159
• Cleaning cycle: pre-rinse → alkaline phase (NaOH 1–2%) → acid rinse (HNO₃ 0.5–1%) → final rinse WFI/PW
• Validation: MACO <0.001 dose/day, ATP swab <10 RLU, TOC <500 ppb (USP <643>)
• HECHT products: ProClean Conveyor (PCC) with CIP cycle, EPDM/PTFE membrane check valves, zero dead-leg hygienic valves
• ROI: 30–50% reduction in cleaning time, –15–25% water consumption (IE4 pump), GMP audit score +20%

A well-designed CIP system increases production efficiency (OEE) and reduces the risk of cross-contamination below the MACO threshold. View our powder processing portfolio and our hygienic solutions for pharma and food, or plan a test run at our Test & Trial Centre in Pörnbach.

A CIP system (Cleaning in Place) cleans production installations without disassembly, through automated circulation of water and cleaning agents at 60-85°C, in 5 phases (pre-rinse–alkaline–rinse–acid–disinfection). Standard cycle takes 30-90 minutes. Mandatory for GMP pharma (EU Annex 1), EHEDG food and FDA 21 CFR Part 117. HECHT integrates CIP into PCC, EWI and FDS containment systems.

What exactly is CIP?

CIP stands for Cleaning in Place: an automated cleaning method in which piping, tanks and equipment are cleaned without disassembly. Cleaning agents circulate via pumps through the complete process system. For powder processing, CIP is critical because residues between batches can cause cross-contamination.

How does a CIP system work? The 5 phases

Phase 1: Pre-rinse (5-10 min)

Lukewarm water (~30°C) removes loose product. Rinse liquid goes to drain.

Phase 2: Alkaline cleaning (15-25 min)

NaOH solution 1-2% at 60-85°C removes fats, proteins and organic residues.

Phase 3: Intermediate rinse (5-10 min)

Demineralised water rinses away alkaline residues.

Phase 4: Acid rinse (10-15 min)

HNO₃ or phosphoric acid 0.5-1% at 60-85°C removes mineral residues and scale.

Phase 5: Disinfection + final rinse (5-15 min)

Hot water (>85°C) or steam (SIP) kills micro-organisms. Final rinse with demineralised or WFI water for pharma.

Total cycle time: 30-90 minutes depending on degree of soiling and compliance requirements.

Compliance by industry

Hecht's CIP integration

All Hecht containment systems are supplied with CIP connections as standard:

• ProClean Conveyor (PCC) — automatic CIP between batches via integrated spray heads
• EWI Endless Liner — CIP for the mixing chamber, endless liner for the product side
• FDS Filling-Discharge — CIP cycle for internal FIBC handling
• LBK-EC valve system — CIP integrated into the mixing chamber

View Hecht's containment systems for powder handling and pneumatic transport systems.

CIP installation: what do you need?

• CIP skid with centrifugal pump (1-50 m³/h)
• 3 storage tanks: alkaline, acid, water
• Heater (steam or electric up to 95°C)
• Conductivity, pH, temperature and flow sensors
• PLC control (validated for GMP via GAMP 5)
• TOC meter for pharma cleaning validation

For pharmaceutical installations, HECHT supplies CIP skids validated according to the IQ/OQ/PQ protocol.

Case study: CIP for a multi-product API line

A CDMO produced 6 different APIs on one production line, with OEB 3-4 cross-contamination risks. HECHT integrated a 5-phase CIP into the existing PCC with TOC measurement. Cleaning validation 3 batches per product. Result: 0 cross-contamination incidents in 18 months, batch changeover time reduced from 8 hours to 2.5 hours.

Frequently asked questions

What does CIP mean?

CIP stands for Cleaning in Place. An automated cleaning method in which equipment does not need to be disassembled.

What is a CIP installation?

A CIP installation is the complete equipment set for in-place cleaning: a skid with pumps + heater + storage tanks (alkaline, acid, water), sensors, PLC control and a TOC meter for validation.

What is CIP cleaning?

CIP cleaning is an automated 5-phase process: pre-rinse → alkaline → rinse → acid → disinfection. Cleaning agents circulate at 60-85°C through piping without disassembly. Cycle time 30-90 minutes.

What is the difference between CIP and COP?

CIP cleans without disassembly — a closed system. COP (Cleaning Out of Place) requires disassembly and manual cleaning. CIP is faster (30-90 min vs 4-8 hours), more reproducible and more GMP-compliant.

What is SIP and how does it differ from CIP?

SIP (Sterilization in Place) uses steam at 121-134°C for 15-30 minutes to kill micro-organisms. Typically follows a CIP cycle. CIP cleans; SIP sterilises.

What does a CIP system cost?

Standard CIP skid: €35,000-€85,000. GMP-validated CIP for pharma: €120,000-€350,000. HECHT integration into existing containment: €25,000-€65,000.

How long does a CIP cycle take?

Standard 30-90 minutes depending on degree of soiling, compliance requirement (pharma: 60-90 min; food: 30-50 min), equipment volume, water temperature and TOC target.

Conclusion

CIP systems are the standard for reproducible cleaning in pharma, food, chemicals and the battery industry. HECHT integrates CIP as standard into every containment system. Call 085 - 06 00 670 or email info@hecht-technology.nl.

FAQ — CIP system

Which cleaning validation is mandatory for a CIP system in pharma?

GMP Annex 1 (2022) requires: MACO calculation (<0.001 dose/day or <10 ppm), TOC analysis <500 ppb (USP <643>), ATP swab test <10 RLU and microbiological limit <100 CFU/cm². Validation proceeds via IQ/OQ/PQ (GAMP 5) with a minimum of three consecutive clean runs (21 CFR Part 211.68).

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