Paul Industries delivers CIP/SIP systems for biotech & bioprocessing as a single-source supplier and installer. We design, fabricate, install, passivate, and validate CIP/SIP systems – the clean-in-place and steam-in-place circuits that sterilize and clean a process train without disassembly – built to the standards your process and your auditors require.
What biotech & bioprocessing need from cip/sip systems
Bioprocessing adds a layer of complexity beyond traditional pharma: living cell cultures, single-use and stainless hybrid trains, bioreactors, and aseptic fill-finish. Cell and gene therapy suites push classification and segregation even harder. The water, piping, and cleanroom systems supporting biologics have to protect sterility and product integrity at every step.
For this work, that means aseptic processing, single-use/stainless integration, WFI and clean steam for bioreactors, and Grade A/B cleanroom segregation – not as an afterthought, but engineered in from the first drawing.
What we deliver
- Clean-in-place (CIP) skids – single-use or recirculating, with spray-device coverage engineered for full wetted-surface contact
- Steam-in-place (SIP) circuits designed for condensate removal, sterilization hold, and validated F0 delivery
- Integration with your process piping so CIP/SIP loops actually reach every dead-leg and instrument
- Cycle development and documentation to support cleaning and sterilization validation
- Controls and recipe management for repeatable, auditable cycles
One accountable partner
Most biotech projects get split between an equipment supplier and an install contractor – and the validation burden falls in the gap between them. Paul Industries closes that gap by self-performing the whole scope, from supply through documented turnover.
Related: CIP/SIP Systems services · Biotech & Bioprocessing solutions · Request a quote
Frequently asked questions
Why do biotech facilities need CIP/SIP systems?
Biotech processes handle live cells, media, and buffers where residual protein, endotoxin, or bioburden ruins a batch. Automated CIP removes tenacious biological soils and SIP sterilizes bioreactors and lines between runs, giving the repeatable cleaning and sterility that biologics manufacturing demands.
How does CIP/SIP work on bioreactors?
A bioreactor is cleaned in place by spray devices reaching the vessel head, walls, agitator, and internals, then steam-sterilized in place to a validated hold before the next culture. Paul Industries designs the spray coverage and steam paths around each bioreactor’s geometry and internals.
Do single-use bioreactors still need CIP/SIP?
Single-use bags eliminate CIP/SIP on the bag itself, but supporting stainless equipment, media and buffer prep tanks, and transfer lines still require cleaning and sterilization. Many biotech plants run hybrid trains, so Paul Industries engineers CIP/SIP for the stainless portions that remain.
How is endotoxin controlled in biotech CIP/SIP?
Endotoxin is heat-stable, so sterilization alone won’t remove it; effective CIP with hot WFI or purified water rinses and validated cleaning chemistry reduces it below limits. Systems fed with WFI and designed for full drainage keep endotoxin off product-contact surfaces.
What soils are hardest to clean in biotech processing?
Denatured protein, cell debris, lipids, and dried media adhere strongly and resist simple rinsing. CIP cycles use hot caustic to break down proteins and lipids plus acid to remove mineral residues. Paul Industries develops and validates chemistry matched to the specific bioprocess soil.
How are media and buffer prep tanks cleaned in biotech?
Prep tanks see high-solids media and salty buffers that leave films and deposits. CIP circulates heated caustic and acid through spray balls covering the tank interior, then rinses to specification. SIP sterilizes before the next batch. Paul Industries builds these prep-tank skids to ASME BPE.
What standards apply to biotech CIP/SIP systems?
ASME BPE for the pipework and vessels, surface finish, drainability and documentation, with ASME B31.3 beneath it for pressure design. EN 285 supplies the physical steam quality criteria used when qualifying SIP, and clean steam condensate is held to the Water for Injection requirements. Passivation follows ASTM A967. The quality framework is 21 CFR 211 with 21 CFR 610 where the product is a biologic, and EU GMP Annex 1 for sterile product supplied into Europe.
How do you validate CIP/SIP for a biologics process?
The cleaning half is harder for biologics than for small molecules, because the residues are proteins and cell debris rather than a defined chemical entity. Total organic carbon is often the more practical release test than a compound-specific assay, and protein-specific methods are used where a limit must be tied to a particular molecule. Recovery studies still have to be performed on coupons of your actual contact surfaces. Denaturation matters too: a cleaning temperature that fixes protein onto the surface makes removal harder rather than easier.
Why is spray coverage critical for bioreactor cleaning?
Cells and media coat every internal surface, so any spot a spray device misses harbors residue that can contaminate the next culture. Coverage is engineered around agitators, baffles, and sensors, then proven with riboflavin. Missed coverage is a leading biotech cleaning failure.
Can CIP/SIP handle multi-product biotech suites?
Yes, but the validation burden is what decides whether it should. Each product entering a shared train triggers cleaning validation at 20,000 to 92,000 dollars, and in biologics the analytical work is the bulk of that. Facilities running several products frequently find that dedicating trains costs less over the portfolio than validating every changeover, and it removes the cross-contamination risk assessment entirely. Where sharing is unavoidable, worst-case product bracketing needs a documented scientific rationale rather than convenience.
How does CIP/SIP support cell and gene therapy manufacturing?
Mostly by being smaller and more segregated than a conventional biologics CIP system. Cell and gene batches are small and often patient-specific, so the dominant risk is cross-contamination between batches rather than bulk cleaning throughput. That pushes toward single-use fluid paths, which remove cleaning from the wetted path entirely, with cleanable stainless reserved for buffer preparation and utilities. Where stainless is used, dedicated equipment per suite is common rather than a shared central skid.
What water quality does biotech CIP/SIP require?
Final rinses typically use WFI or high-purity water to avoid reintroducing endotoxin or ions onto sterilized surfaces. Clean steam for SIP is generated from purified feedwater. Paul Industries integrates CIP/SIP with the high-purity water and clean-steam systems that feed them.
How long does bioreactor SIP take?
SIP time is driven by vessel size, heat-up rate, the validated sterilization hold, and controlled cool-down under sterile gas. Larger stainless bioreactors take longer to reach and hold temperature uniformly. Times are fixed during cycle development and confirmed in validation.
What causes SIP failures on biotech equipment?
Condensate, in almost every case. Saturated steam condenses as it gives up heat, and trapped condensate in a low point or an unsloped run physically blocks steam from reaching the surface it must sterilize, so that location never achieves lethality regardless of the control probe reading. On biotech equipment the specific offenders are transfer lines between vessels, sample and addition ports, and the geometry around agitator seals and sparger connections. Air incompletely displaced at cycle start is the other recurring cause.
Can you retrofit CIP/SIP into an existing biotech suite?
Usually yes, and the binding constraint is utility capacity rather than space. A CIP system imposes a peak water and steam demand frequently larger than anything else in the suite, and loops sized before CIP was contemplated often cannot meet it alongside normal process draw. Tying into qualified equipment is a change requiring assessment, with passivation of the new welds and fresh sampling before return to service. Where only one or two circuits are involved, a portable cart is often the better answer.
How do I start a biotech CIP/SIP project?
Send the equipment list with what each item holds and its internal geometry, the number of distinct products sharing the train, whether single-use is already in use upstream, the soils involved and whether proteins are present, and your available water, steam and effluent capacity. Tell us if SIP is required and on how many vessels. We will come back with a circuit strategy, a view on dedicated versus shared trains against your product count, and what validation will actually involve.
What biotech requirements do you build to?
ASME BPE for bioprocessing pipework and vessels including SF4 electropolished product contact surfaces where the fluid requires it, the USP monographs for Purified Water and Water for Injection with the 0.25 endotoxin units per milliliter limit where WFI applies, and EN 285 for clean steam quality. The quality framework is 21 CFR 211 with 21 CFR 610 general biological product standards, and EU GMP Annex 1 where sterile product goes to Europe.
Get a single-source quote
Paul Industries designs, fabricates, installs, passivates, and validates – one accountable partner instead of a vendor plus a contractor plus a validation firm. Tell us about your project and we will scope it.
What do biotech CIP and SIP systems have to achieve?
| Requirement | What it means |
|---|---|
| Cleaning objective | Removal of media, buffer and cell debris; protein soils behave differently from small molecules |
| Changeover | Product-to-product changeover is the driving case, not just end-of-campaign |
| Sterilization | SIP of bioreactors, transfer lines and filter housings before inoculation |
| Sterile boundary | Valve arrangement defining the boundary must be provable and documented |
| Coverage | Vessel geometry with internals (impellers, baffles, probes) makes coverage harder to achieve |
| Biological waste | Inactivation before discharge where the organism requires it |
| Velocity and return | Return line sized to carry supply flow; a flooded circuit cleans nothing |
| Validation | Cleaning validation plus bioburden and endotoxin control between batches |
Do you handle validation, or just installation?
Both. For CIP and SIP in a biotech plant the validation is inseparable from the installation, because whether a vessel cleans depends on spray device placement, circuit routing, return velocity and valve sequencing rather than on the skid. Paul Industries runs the riboflavin coverage testing that qualifies the spray devices, develops the cycle recipes, executes the three validation runs per circuit, and handles swab and rinse sampling against the carryover limit. For SIP we perform the thermocouple mapping that demonstrates air removal and condensate drainage at worst-case locations. A contractor who installs but cannot validate hands you a skid; the deliverable you actually need is a documented cleaning result.
Can you take a project from design through startup?
Yes. On a biotech cleaning system the startup phase is where most of the risk sits, because a cycle can only be developed meaningfully against real soil, which means running it during a gap between campaigns rather than on a convenient date. Holding design through startup under one contract means the circuit routing, return velocity and spray device selection are decided with the cycle in mind rather than handed to whoever validates later. It also means a failed coverage test is corrected by the party that built the circuit, in the same window, instead of becoming a scope discussion between a skid vendor and a piping contractor.