Trailers used to transport asphalt tanks must meet the following technical requirements:
Vehicle Qualifications and Standards
- Compliance with Access Review Requirements: They must comply with the relevant requirements of the "Road Motor Vehicle Product Access Review Requirements" (Ministry of Industry and Information Technology Announcement No. 1 of 2019).
- Compliance with Dangerous Goods Transport Requirements: As a dangerous goods transport vehicle, they must meet the requirements for dangerous goods transport semi-trailers.
Tank Requirements
- Volume and Capacity: The total tank capacity must comply with relevant standards. For tank trucks transporting liquids, the tank volume (calculated based on the external dimensions) × 0.85 ≤ the total tank capacity.
- Material and Structure: The tank is typically made of high-quality steel, such as Q235A carbon steel, which provides sufficient strength and stability. The tank's shape is generally oval, round, or square-round to enhance stability and load-bearing capacity.
- Thermal Insulation: Asphalt tank trailers are typically equipped with an insulation layer to maintain the temperature of the asphalt and prevent it from solidifying. For example, the insulation thickness of some vehicle models can reach 80mm.
- Safety Label: The right side of the tank or its welded support should have a metal nameplate indicating the unique identifier, tank design code, tank capacity, and other information.
Safety and Protective Devices
- Brake System: The vehicle should be equipped with disc brakes and an automatic brake clearance adjuster to ensure braking performance.
- Tires: Radial tires should be used to improve driving stability and safety.
- Suspension System: Air suspension is required to adapt to varying road conditions and reduce impact on the tank and cargo.
- Static Discharge Device: A static-dissipating rubber drag strip with a grounding conductor cross-sectional area of 100mm² or greater should be installed at the rear. The grounding end of the drag strip should always be grounded, regardless of whether the vehicle is empty or fully loaded.
- Protective Device: The vehicle should be equipped with protective devices, such as welded left and right side guards and rear lower guards. The rear guard cross-sectional dimensions and ground clearance should comply with relevant standards.
Vehicle Performance
- Roll Stability: When fully loaded and in a static state, the roll stability angle to the left and right should be greater than or equal to 23°.
- Vehicle Identification Code: Tank trailers with a gross mass greater than or equal to 10,000 kg must have at least two vehicle identification codes engraved on the tank.
Other Requirements
- Vehicle Marking: Vehicle markings must comply with GB 13392, "Markings for Road Transport of Dangerous Goods Vehicles."
- Tank Inspection: The tank of a semi-trailer transporting atmospheric pressure liquid dangerous goods must comply with GB 18564.1, "Road Transport of Liquid Dangerous Goods Tank Vehicles - Part 1: Technical Requirements for Metal Atmospheric Pressure Tanks," and GB 18564.2, "Road Transport of Liquid Dangerous Goods Tank Vehicles - Part 2: Technical Requirements for Non-metallic Atmospheric Pressure Tanks." A tank inspection report must also be provided.