In the field of pharmaceutical production, compressed air is a key public medium, and its quality is directly related to the safety and effectiveness of drugs. In order to ensure that compressed air meets pharmaceutical production specifications, a control system needs to be established from the following dimensions:
1. Quality Core Standards
- cleanliness control
- particulate Matter Restriction: The content of particles with diameter> 0.1μm in compressed air should be ≤ 3,500 particles/ m³ avoid particulate contamination of medicines.
- microbial control: After passing through a 0.22μm sterilization filter, the microbial load of compressed air needs to be <1CFU/ m³ to prevent microbial contamination of sterile preparations.
- Oil content control
- for compressed air in direct contact with drugs, the total oil content should be ≤ 0.01mg/ m³, using oil-free air compressor or post activated carbon filter device to achieve.
- Water content management
- pressure dew point shall be ≤ -20℃ it is realized by refrigeration dryer or adsorption dryer to avoid moisture condensation causing drug deterioration or equipment corrosion.
2. System Design Specification
- material Compatibility
- pipes and valves in contact with compressed air shall be made of 316L stainless steel or PTFE coating to avoid metal ion precipitation and pollution of drugs.
- Seals should be made of non-toxic materials such as EPDM or silicone, in line with FDA 21 CFR 177.2600 standards.
- Fluid Mechanics Design
- avoid blind pipes in the pipeline layout, and the length of dead corners shall be less than or equal to 1.5 times the pipe diameter to ensure complete gas replacement.
- The key gas point is equipped with a terminal filter with a filtration accuracy of 0. 01μm achieve point-to-point protection.
- Cleanability Design
- system supports on-line steam sterilization (SIP) or CIP cleaning, temperature resistance ≥ 121℃ meet the cleaning verification requirements.
- The drainage device adopts automatic drain valve to avoid the risk of pollution caused by manual operation.
3. operation and maintenance requirements
- daily monitoring
- check the compressed air pressure, temperature and water content daily, record the data and draw the trend chart.
- A microbial challenge test was performed weekly, and culture was performed using R2A medium at 30-35°C for 5 days to confirm sterile growth.
- Preventive Maintenance
- the filter element of the air filter is replaced every 2000 hours, and the integrity test is carried out before and after the replacement.
- The regeneration cycle of the dryer shall be carried out according to the equipment manual, and the accuracy of the dew point meter shall be checked regularly.
- Change Control
- system modifications or component replacements require a change process to assess the impact on drug quality.
- DQ (Design Validation), IQ (Installation Validation), OQ (Operational Validation), PQ (Performance Validation) are required for the introduction of new equipment.
Control Points of 4. Typical Application Scenarios
| process link | compressed air quality requirements | control focus |
|---|---|---|
| sub-packaging process | cleanliness ISO level 5, oil content ≤ 0.001mg/ m³ | terminal filtration online sterilization |
| granulation process | cleanliness ISO level 7, water content ≤-40 ℃ dew point | adsorption Drying Periodic Integrity Test |
| packing process | cleanliness ISO class 8, microbial load <10CFU/ m³ | periodic environmental monitoring filter replacement |
5. quality traceability and continuous improvement
- electronic Batch Record
- compressed air quality data is incorporated into the electronic batch record system to achieve traceability of the production process.
- Abnormal data triggers the deviation investigation process to identify the root cause and develop corrective actions.
- Annual Quality Review
- annual quality review of the compressed air system to analyze parameters such as filter life and dryer efficiency.
- Optimize maintenance schedules based on data trends, such as adjusting filter replacement cycles or dryer regeneration temperatures.
Conclusion
The pharmaceutical production enterprises need to establish a quality management system covering the whole chain of “production-transportation-use” of compressed air, through scientific design, rigorous maintenance and continuous monitoring, to ensure that the quality of compressed air continues to meet the requirements of pharmaceutical production. With the improvement of regulatory requirements, enterprises should actively introduce intelligent sensors, big data analysis and other technical means to achieve real-time early warning and lean management of compressed air quality, and provide a solid guarantee for drug quality and safety.
