Refrigerated Transport & GDP
Temperature-controlled transport: ATP classes A–F, vehicle technology & multi-temp units, GDP vs. GMP for pharma supply chains, temperature excursion management, reefer truck vs. reefer container (sea freight).
Key temperature requirements at a glance
ATP Classes: Agreement on the International Carriage of Perishable Foodstuffs
The ATP Agreement (Geneva, 1970) classifies refrigerated vehicles by their insulation performance and defines permissible temperature ranges for perishable foodstuffs. Applies in cross-border traffic between contracting states (mostly European and neighbouring states). Recognised in Switzerland as CH-ATP.
Note: The official ATP nomenclature uses combination codes (e.g. FRC = refrigeration unit, reinforced insulation, ≤ –20°C). The simplified classes A–F used here correspond to the temperature ranges commonly used in practice in Germany/CH.
| ATP Cl. | Description | Temp. range |
|---|---|---|
| A | Deep-frozen vehicle class A | ≤ –20°C |
| B | Deep-frozen vehicle class B | ≤ –10°C |
| C | Refrigerated vehicle class C | ≤ 0°C |
| D | Refrigerated vehicle class D | ≤ +7°C |
| E | Heated vehicle class E | ≤ +12°C |
| F | Heated vehicle class F | +12°C bis +20°C |
GDP – Good Distribution Practice (Pharma)
GDP guideline (EU 2013/C343/01) for medicines: All companies distributing human medicines must maintain a GDP quality management system. Key requirements: controlled temperature conditions, complete documentation, deviation management, vehicle qualification.
GDP Temperature Requirements
- Refrigerated: +2°C to +8°C (cold chain)
- Ambient products: +15°C to +25°C
- Deep-frozen medicines: ≤ –18°C (product-dependent down to ≤ –25°C, e.g. certain blood products)
- No uncontrolled temperature fluctuations
GDP Documentation Obligations
- Complete temperature records (calibrated devices)
- Vehicle validation & qualification
- Training records of all involved personnel
- Deviation/exception reports for exceedances
- Traceability of all shipments
Comparison: Reefer Truck vs. Reefer Container (Sea Freight)
| Aspect | Reefer Truck (Road) | Reefer Container (Sea) |
|---|---|---|
| Temperature range | –30°C bis +30°C | –25°C bis +30°C |
| Loading space (approx.) | 33–66 m³ (per trailer) | 28 m³ (20ft) / 59 m³ (40ft) |
| Transit times Europe | 1–7 days (direct) | N/A (intercontinental only) |
| Power supply | Diesel generator (refrigeration unit) | 380–440V three-phase (at ship/terminal) |
| GDP suitability | Very good (direct control) | Possible (monitoring required) |
| Costs (relative guidelines) | High (direct transport) | Medium to high (+ surcharge) |
Important Notes for Refrigerated Transport
- !Pre-cool vehicle before loading (min. 1–2h before)
- !Never mix warm goods with chilled goods (cross-contamination, temperature rise)
- !Minimize door opening times; comply with loading dock rules
- !Activate temperature loggers and read/record at handover
Vehicle Technology & Refrigeration Units
⚙️ Refrigeration Unit Technology
- Leading manufacturers: Thermo King (TX series) and Carrier Transicold (Supra HE, Vector)
- Drive: independent diesel combustion engine (independent of vehicle engine)
- HVO-compatible operation: up to 80% CO₂ reduction vs fossil diesel
- Power consumption: approx. 4–5 kW at –21°C (frozen), approx. 2–3 kW at +4°C (chilled)
🌡️ Multi-Temperature Transport (Multi-Temp)
- Partition wall (fixed or movable) divides loading space into 2–3 zones
- Typical: frozen (–20°C) + chilled (+4°C) simultaneously in the same vehicle
- Economical: one vehicle instead of two – fewer trips, lower emissions
- Important: each zone requires its own ATP certification
| Vehicle type | Load space |
|---|---|
| Refrigerated van (up to 3.5 t) | 6–12 m³ |
| Refrigerated box truck (7.5–12 t) | 20–35 m³ |
| Refrigerated semi-trailer (13.6 LDM) | 60–82 m³ |
| Multi-temp semi-trailer (2–3 zones) | 60–75 m³ |
GMP vs. GDP – What is the Difference?
GMP – Good Manufacturing Practice
Governs the manufacturing of medicines. Concerns pharmaceutical companies, manufacturers, fillers.
- ·EU Directive 2003/94/EC (human medicines)
- ·Applies at the manufacturing site (factory, lab, clean room)
- ·Quality control, purity, sterility, active ingredients
GDP – Good Distribution Practice
Governs the distribution (storage, transport) of medicines. Concerns wholesalers, transport companies, freight forwarders.
- ·EU Guideline 2013/C343/01 (last updated)
- ·Applies from leaving the production site to end recipient
- ·Temperature control, traceability, deviation management
⚠️ Practical note: A carrier transporting pharmaceutical products must be GDP-compliant – but not necessarily GMP-certified. GMP requirements primarily concern the manufacturer. However, many GDP transports require a written Quality Agreement between the pharmaceutical company and the carrier.
Temperature Excursion – What to do when the cold chain breaks?
A temperature excursion occurs when goods are stored or transported outside the specified temperature range. For GDP-regulated pharmaceutical products, this has direct regulatory consequences.
- ·Read temperature history from logger
- ·Place goods under quarantine
- ·Inform recipient and client
- ·Check manufacturer stability study (short-term deviation permitted?)
- ·Risk assessment by Qualified Person (QP)
- ·Decision: release, destruction or recall
- ·Create deviation report
- ·Conduct Root Cause Analysis
- ·Define and implement CAPA measures
* CAPA = Corrective Action Preventive Action. Temperature logger calibration required at least annually. For frozen products (–18°C): short-term deviation up to –15°C during loading/unloading and defrosting permitted (max. +3 K, ATP rule).