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National standard A–H eight temperature zones for refrigerated trucks, applicable cargo types, and key high-temperature transportation precautions in summer.

Whether new or experienced operators, you will avoid mistakes in vehicle selection and cargo loading.

1. Mandatory National Standard! A–H 8 Temperature Zones Divided into Two Major Categories

In accordance with national professional standards, all formal refrigerated trucks are classified into eight grades from A to H based on average compartment temperature, divided into two core transportation categories with respective professional applications.

2. Cold Chain Mandatory Standards! Must Follow Core Temperature Control Requirements

Pre-cooling before loading is mandatory: Pre-cool the compartment down to the lower limit of transport temperature in advance. The whole-process temperature deviation shall be strictly controlled within ±3℃, and cargo temperature fluctuation during transportation shall also not exceed 3℃.

Full traceability for pharmaceutical transport: GSP-compliant vehicles are equipped with real-time temperature collection, high-definition display, automatic recording and remote alarm functions. Abnormal temperature triggers timely early warning; the whole process is traceable, fully compliant and avoids penalties.

3. Special Summer High-temperature Cold Chain Tips — Avoid Mistakes and Losses

Temperature control for tropical fruits: Bananas, mangoes, durians and other tropical fruits shall be transported steadily at around 10℃. Too low temperature causes frost damage and blackening; too high accelerates ripening and decay. Precise temperature control preserves appearance and quality.

Strictly limit temperature fluctuation: National standard allows ±3℃ fluctuation. The more precise the temperature control, the lower fresh goods loss and the higher the profit.

Pre-cool before loading: Compartments get extremely hot after sun exposure in summer. Never load cargo into a hot compartment. Pre-cool in advance to prevent sudden temperature rise and cargo deterioration.

Open and close doors quickly during loading/unloading: Shorten door opening time to reduce cold air loss, preserve cargo quality and cut refrigeration fuel consumption.

4. Full Temperature Zone Coverage — Choose SUNHUNK for Professional Cold Chain

SUNHUNK refrigerated trucks perfectly adapt to all cold chain scenarios:

• Rivet-bonded structure + European open foaming technology delivers excellent heat preservation, stable cooling performance without cold leakage under summer high temperature.

• High structural strength, anti-vibration and non-deformable, long service life and lower long-term operating cost.

• Support regular food cold chain and GSP pharmaceutical refitting, fully compliant for road operation with no order restrictions.

Choose the right temperature zone, premium craftsmanship, and choose SUNHUNK.

In 2026, we keep moving forward non-stop!