Hygiene and sterilization
Cleaning and in-place pre-sterilization serve different purposes.
Where SIP applies, the exact supplier and process documents must define it. A credible filler specification identifies the selected method, coverage, interfaces, acceptance criteria, records, and responsibility.
| Decision | CIP · Cleaning in place | Pre-sterilization · SIP where applicable |
|---|---|---|
| Purpose | Remove product soil and reach a defined clean state. | Establish the specified condition on an already clean system using the selected method. |
| Core inputs | Chemistry, concentration, temperature, time, velocity or flow, mechanical action, and water quality. | Specified sterilization or decontamination method, medium, critical limits, exposure or hold basis, and boundary integrity. |
| Coverage question | Which lines, valves, instruments, dead legs, fill heads, and return paths are actually cleaned? | Which surfaces and barriers are included, what location is least exposed, and what remains outside the sterile boundary? |
| Evidence | Cycle record, chemical concentration, return conditions, rinse endpoint, visual or analytical verification, and validation data. | Cycle records for specified critical limits, sensor or sampling locations, alarms and deviations, and approved qualification or validation evidence. |
| Common error | Writing “CIP compatible” without defining the customer skid and return capability. | Treating any hot or chemical sequence as validated SIP without a defined acceptance basis. |
URS QUESTIONS
Define the customer–supplier interface.
01 Is the filler connected to a customer CIP skid or supplied with a dedicated circuit?
02 What supply and return flow, pressure, temperature, chemistry, drainage, and neutralization are available?
03 Which valves, instruments, fill heads, sterile-air filters, and package-contact parts require separate treatment?
04 Who owns cycle development, field qualification, process validation, routine review, and deviation approval?