@Air Compressor
2025-04-02
What are the compressed air testing standards in food factories?
Food factory compressed air testing standards involve multiple key indicators, the following are fromCore testing items, regulatory basis, testing methodsThree dimensions provide you with detailed analysis:
1. Core testing indicators and limits
| test items | limit requirements | according to the standard | detection significance |
|---|---|---|---|
| oil content | ≤0.01 mg/m³ | ISO 8573-1 Class 1 | Prevent oil contamination of food and avoid odors or chemical reactions |
| particulate matter | ≤0.1 μm (solid particles) | ISO 8573-1 Class 1.2 | Avoid particulate matter carrying microorganisms or physically contaminating food |
| microbial | <1 CFU/m³ | GMP sterile area standard | Strictly prevent and control colonies exceeding the standard and comply with HACCP requirements |
| Moisture (dew point) | ≤-40℃ (pressure dew point) | ISO 8573-1 Class 2 | Prevent food from moisture, equipment corrosion and microbial growth |
| chemical contaminants | Comply with GB 5749-2006 Sanitary Standard for Drinking Water | Domestic food safety regulations | Avoid volatile organic compounds (VOCs) contaminating food |
2. Regulations and standards system
- international standards
- ISO 8573-1:2010: Specify the impurity level of compressed air, and the food grade must reach Class 1.2.1 (solid particles), Class 1 (oil content), and Class 2 (moisture).
- British BRC/BCAS Code: Food-grade compressed air is required to have a pressure dew point of ≤-20℃ and an oil content of <0.1 mg/m³.
- domestic legislation
- GB 14881-2013 General Hygiene Specification for Food Production: Clarify that the compressed air system needs to be cleaned and disinfected regularly to avoid pollution risks.
- HACCP system requirements: Including compressed air into critical control points (CCP) requires online monitoring and alarm devices.
- Guidance for Industry
- FDA Codex: Although compressed air standards are not directly stipulated, they require that “the quality of air in contact with food is equivalent to the safety requirements of the food itself.”
3. Testing methods and tools
| test items | recommendation method | Instrument examples | detection cycle |
|---|---|---|---|
| oil content | Infrared spectroscopy, weighing method | SUTO·S601 (portable analyzer) | Pre-production inspection per shift |
| particulate matter | Laser scattering method (0.1-10 μm particle size) | Lighthouse 3016 (dust particle counter) | detected weekly |
| microbial | Microplankton sampling +PCR quantification | MAS-100 (Microbial Sampler) | Monthly testing |
| moisture | Capacitive dew point meter (accuracy ± 0.2 ℃) | GE DP-X2 (dew point meter) | real-time online monitoring |
| chemical contaminants | Gas chromatography-mass spectrometry (GC-MS) | Agilent 7890B (gas chromatograph) | Quarterly testing |
4. Practical suggestions for quality control
- system configuration
- usingOil-free screw air compressor + tertiary filtration (pre-filtration + activated carbon + sterilization filtration)。
- installationOnline dew point meterandoil sensorAchieve 24-hour real-time monitoring.
- maintenance plan
- daily: Drain condensate from the air storage tank and check the operating status of the dryer.
- weekly: Replace the pre-filter element and verify the pressure gauge.
- monthly: Conduct full-project inspection and clean the cooling system.
- every year: Entrust a third party organization to carry out ISO 8573 certification.
- emergency measures
- Standby air compressor and independent drying system shall be configured to prevent main equipment failure from causing line shutdown.
- establishPollution Incident Traceability Agreement, clarify the chain of responsibility from air compressors to food contact points.
conclusion: The detection of compressed air in food factories must follow the triple guarantee principle of “source control + process monitoring + end verification.” By strictly implementing ISO8573 and other standards, combined with advanced Detection Tools, it can be ensured that the quality of compressed air continues to meet food safety requirements.