A clean-in-place (CIP) system automatically cleans the interior of process piping, tanks, and equipment without disassembly — essential for cGMP pharmaceutical, biotech, cosmetic, and food & beverage production. Paul Industries designs, fabricates, installs, and validates turnkey CIP and SIP (sterilize-in-place) systems for manufacturing facilities across the United States, with more than 30 years of cGMP/FDA-compliant experience.
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What it isAutomated cleaning & sterilization of process equipment without disassembly
Who it’s forcGMP pharma, biotech, cosmetic, nutraceutical & food/beverage plants
ScopeDesign → skid fabrication → installation → controls/automation → IQ/OQ/PQ
StandardsASME BPE-2022 · ASME B31.3 · 3-A Sanitary · cGMP / 21 CFR 211
Service areaNationwide (all 50 states)
Also availablePreventive maintenance & 24/7 service contracts
How a CIP system works
A clean-in-place system circulates cleaning solutions — typically a sequence of water rinses, caustic wash, acid wash, and a final rinse — through fixed process piping, tanks, fillers, and heat exchangers using dedicated CIP pumps, spray devices, and a controlled recipe. Because the equipment is cleaned in place, there is no need to break down piping or manually scrub vessels, which removes operator variability and produces a repeatable, documentable clean every cycle.
A typical CIP skid integrates supply and return pumps, heat exchangers for temperature control, conductivity and flow instrumentation, chemical dosing, and a PLC that runs validated cleaning recipes. Sterilize-in-place (SIP) extends the same principle to sterilization: after cleaning, pressurized clean steam is circulated to sterilize the interior surfaces of bioreactors, WFI loops, and filling systems. Paul Industries builds both as integrated, automated systems tied into your existing utilities and controls.
CIP vs SIP vs COP
These three cleaning methods are often confused but serve different roles. Most cGMP facilities use a combination: CIP for fixed equipment, SIP where sterility is required, and COP for removable parts that cannot be cleaned in place.
CIP vs SIP vs COP at a glance
| CIP | SIP | COP |
|---|
| Purpose | Cleans equipment interiors | Sterilizes after cleaning | Cleans removable parts |
|---|
| Method | Circulated cleaning solutions | Pressurized clean steam | Wash tank / manual station |
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| Disassembly | None | None | Parts removed |
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| Typical use | Tanks, piping, fillers | Bioreactors, WFI loops | Small parts, fittings, gaskets |
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| Validation | IQ/OQ/PQ + riboflavin coverage | IQ/OQ/PQ + thermal mapping (F₀) | Cleaning verification |
|---|
Our CIP, SIP & COP services
Paul Industries delivers CIP and SIP as a single-source scope so one team is accountable from concept to a validated, running system:
- Design & engineering — CIP circuit design, spray-device coverage, slope and drainability, chemical and utility sizing.
- Skid fabrication — prefabricated CIP/SIP skids built to ASME BPE with orbital-welded, documented sanitary piping.
- Installation — field piping, tie-ins to existing tanks and loops, utilities, and drains, self-performed by our mechanical crews.
- Automation & controls — PLC/HMI recipe control, conductivity and temperature verification, data logging for cGMP records.
- Validation — IQ/OQ/PQ, riboflavin coverage testing, and cleaning validation support.
- Maintenance — preventive-maintenance and 24/7 service contracts to keep cleaning cycles in a validated state.
Industries we serve
We install CIP and SIP systems for pharmaceutical and biotech drug manufacturing (including WFI and bioreactor suites), cosmetic and personal-care blending and filling lines, nutraceutical production, and food & beverage plants where 3-A sanitary standards and allergen control apply. Each industry has different chemistry, temperature, and documentation needs, and we tailor the recipe design and materials accordingly.
Standards & compliance
- ASME BPE-2022 (Bioprocessing Equipment)
- Governs the design, materials, surface finish, and weld quality of hygienic process piping — the foundation of a cleanable, drainable CIP circuit.
- ASME B31.3 (Process Piping)
- The pressure-piping code that governs safe design and installation of the process and utility piping that carries CIP/SIP media.
- 3-A Sanitary Standards
- Sanitary design criteria widely applied in food, dairy, and beverage processing to ensure equipment can be reliably cleaned.
- cGMP / 21 CFR 211
- FDA current Good Manufacturing Practice requirements for cleaning and its documentation — the reason a CIP system must be validated, not just installed.
- IQ / OQ / PQ
- Installation, Operational, and Performance Qualification prove the CIP system was built correctly, operates within its parameters, and consistently cleans to specification.
Why Paul Industries
Because we self-perform design, sanitary-piping fabrication, installation, and validation, a Paul Industries CIP/SIP project has a single point of accountability — no gaps between the engineer who designs the circuit, the welder who builds it, and the team that validates it. Our crews have delivered process-equipment and high-purity systems across the United States for more than three decades, and every weld and cycle is documented for cGMP traceability. Where public project references are limited by client confidentiality, we provide capability statements, weld and material documentation, and validation deliverables on request.
CIP/SIP systems help facilities meet cGMP cleaning and sterilization expectations. See what cGMP requires.
Frequently asked questions
What is a CIP/SIP system?
A CIP (clean-in-place) system automatically circulates cleaning solutions through process equipment without disassembly, while an SIP (steam-in-place) system sterilizes that same equipment with clean steam. Together they clean then sterilize tanks, piping, and vessels in place to meet cGMP contamination-control requirements.
How does a CIP system work?
A CIP skid pumps a timed sequence of pre-rinse, caustic wash, acid wash, and final rinse through spray balls or nozzles inside vessels and across circuits. Flow rate, temperature, chemical concentration, and contact time are controlled and recorded to give repeatable, validated cleaning.
How does an SIP system work?
SIP admits clean steam into a closed vessel or piping circuit, displaces air, and holds a validated temperature (commonly around 121 C) for a set exposure time, then cools under sterile air or nitrogen. Condensate is drained through steam traps at low points.
What are the main components of a CIP/SIP system?
A typical system includes a supply pump, heat exchanger or steam injection for heating, chemical dosing, spray devices, supply and return piping, sanitary valves, instrumentation, and PLC controls. SIP adds clean-steam supply, traps, and condensate drainage. Paul Industries fabricates all of it to ASME BPE.
What materials are CIP/SIP systems built from?
Product-contact surfaces are typically 316L stainless steel, orbital-welded, and passivated per ASTM A967/A380 for corrosion resistance and cleanability. Surface finishes are electropolished or mechanically polished to hygienic-design targets so cleaning solutions and steam contact every wetted surface.
What standards govern CIP/SIP systems?
Design and fabrication follow ASME BPE for hygienic piping, ASTM A967/A380 for passivation, and cGMP plus FDA expectations for cleaning and sterility. USP <1231> informs water quality feeding the system. Paul Industries builds and validates against these references.
How is a CIP system validated?
Validation proves the cleaning cycle removes residues and reaches every surface. Riboflavin coverage testing confirms spray-device reach, swab and rinse sampling confirm residue limits, and IQ/OQ/PQ document installation, operation, and repeatable performance. Paul Industries delivers the full protocol package.
Why is drainability important in CIP/SIP design?
Pooled cleaning solution or condensate breeds contamination and defeats sterilization. Lines are sloped, dead legs minimized, and low-point drains added so vessels and piping fully self-drain. Poor drainability is a leading cause of failed cleaning and SIP cycles.
What is a dead leg and why does it matter?
A dead leg is a section of piping where flow stagnates, such as an unused branch or oversized valve pocket. Cleaning solution and steam struggle to reach it, so residues and organisms survive. ASME BPE limits dead-leg length; Paul Industries designs them out.
Can CIP and SIP share the same system?
Yes. Many skids perform CIP then SIP on the same vessel using shared supply piping, valves, and controls, cleaning first and sterilizing second. Integrating them reduces piping, footprint, and cross-connection points while keeping sequences automated.
How long does a CIP or SIP cycle take?
A CIP cycle commonly runs 30 to 90 minutes across pre-rinse, wash, and rinse phases depending on soil and volume. An SIP cycle depends on heat-up, sterilization hold, and cool-down. Cycle times are set during development and locked in validation.
What causes a CIP cycle to fail?
Common causes include insufficient spray coverage, low flow velocity, wrong chemical concentration or temperature, dead legs, and poor drainage. Paul Industries traces failures to their source and corrects the mechanical or cycle-parameter root cause. Call 201-450-8280.
Do I need CIP/SIP for cGMP manufacturing?
If you process biologics, sterile products, or multi-product lines, automated CIP/SIP is generally required to prove repeatable cleaning and sterility and to control cross-contamination. Manual cleaning is harder to validate and reproduce. Paul Industries engineers systems to your product and regulatory scope.
Can CIP/SIP systems be installed in an existing plant?
Yes. Systems can tie into existing tanks, bioreactors, and loops through retrofit engineering around live production. Paul Industries scopes tie-ins during shutdown or turnaround windows to limit downtime while adding automated cleaning and sterilization.
How is a CIP/SIP system maintained?
Maintenance covers spray-device inspection, valve and seal service, pump checks, instrument calibration, and periodic re-validation. Paul Industries offers preventive maintenance so coverage and sterilization stay within validated limits and failures are caught before a batch is affected.
How do I get a CIP/SIP system designed?
Share your P&IDs, equipment list, product types, and cleaning and sterility goals. Paul Industries reviews the scope, engineers the skid and distribution, fabricates to ASME BPE, installs, and validates it as one accountable contractor. Call 201-450-8280 to start.
Do I need CIP or SIP for a WFI system?
Most water-for-injection (WFI) loops use both: CIP-style hot-water or chemical circulation to clean the loop, and SIP with clean steam where sterilization is required. The right approach depends on your loop design, temperature, and whether the system is sanitized or sterilized — we assess this during design.
How long does CIP installation take?
A prefabricated CIP skid tie-in can take a few weeks, while a full multi-circuit system with new piping, automation, and validation typically runs several weeks to a few months. Prefabricating skids off-site shortens on-site downtime, which we plan around your production schedule.
Do you validate the CIP system (IQ/OQ/PQ)?
Yes. We provide Installation, Operational, and Performance Qualification along with riboflavin coverage testing and cleaning-validation support, so the same team that installs the system also documents and proves it.
What standards apply to sanitary CIP piping?
Sanitary CIP piping is built to ASME BPE-2022 for hygienic design, materials, and weld quality, and to ASME B31.3 for pressure-piping safety. Food and beverage systems also follow 3-A sanitary standards, and the overall system must meet cGMP / 21 CFR 211.
Can you retrofit CIP into an existing line?
Yes. We routinely retrofit CIP and SIP into existing production lines — evaluating drainability, slope, dead legs, and spray coverage, then adding skids, piping, and controls with minimal disruption to ongoing production.
Which industries do you install CIP/SIP systems for?
We serve pharmaceutical, biotech, cosmetic, nutraceutical, and food & beverage manufacturers nationwide.
Get a CIP/SIP project quote
Tell us about your facility, product, and cleaning requirements — a Paul Industries engineer will follow up to discuss scope, standards, and timeline.
Request a Project Quote
or call 201-450-8280
