The latest news from the Department of Transportation (DOT) of the United States released a new tire identification code for 2014, which was 44 more than doubled in 2013. Of these, China has 32, while Shandong Province has 18, and four factories are in Russia.
The current DOT data covers 362 Chinese tire factories, of which about 24 point to the same factory, and 36 factories are not operated by China.
The world's major tire manufacturers Goodyear Tire, Hankook Tire Co., Ltd. and Japan Sumitomo Rubber Industry Co., Ltd. are newly released factory codes.
What is DOT?
"DOT" indicates that this tire meets the safety standards set by the US Department of Transportation (DOT). The 11 digits and letters immediately after "DOT" indicate the tire's identification number or serial number. The DOT is divided into ABC Class III, where the C Class Standard is the lowest and only meets the minimum performance conditions stipulated by the US Department of Transportation (DOT). The other two levels are higher than the standards required by the DOT. All tires exported to the United States must undergo DOT certification and obtain their certification code.
Example - Partial tire factory DOT code:
How to Apply for DOT Certification on Tire
1) The manufacturer designates an agent who has permanent residency in the United States. The agent will participate in all communications with the US Department of Transportation during the compliance application process;
2) Submit the agent's documents and the Federal Motor Vehicle Safety Standards (FMVSS) Compliance Application to the Ministry of Communications;
3) randomly select samples for testing;
4) If the product test fails, the applicant needs to improve the product, re-send the sample for re-testing, until the final pass;
5) OVSC and DOT approve the applicant's compliance application and issue a notification letter to allow the product to enter the US market legally;
6) OVSC will conduct sampling inspections on motor vehicles and parts annually to verify the validity of the DOT certification held by the manufacturer and ensure that the product meets the minimum performance and labeling requirements specified in the FMVSS standard.
The key points for applying for US DOT certification
1) DOT certification requires that there must be an agent in the United States. The agent is solely responsible for all matters in the United States;
2) After passing the DOT certification, the Ministry of Communications will not issue certificates. For the tire, after registration, the manufacturer will receive the identification code DOT ID assigned by the Ministry of Communications. The code consists of two digits/letters. Enter the code in the DOT database to query the manufacturer and register product information. Moreover, the same DOT ID can be used for all models of the same factory. Those who cannot receive the assigned ID code or other reply letter as the manufacturer who passes the DOT certification mark can only indicate that the registration was successful only at the Ministry of Transport, but cannot prove that the product conforms to the standard. The latter needs to be proven through sufficient testing.
3) The number assigned to the manufacturer by the US Department of Transportation and the "DOT" logo should all appear on its products. In addition, size, pressure, speed limit, tire type, etc. should also be marked in the required size in the required position.
4) The test tires are mounted on the assembly model to simulate driving conditions, and then the tires are tested for durability, strength, and high-speed performance.
5) In addition to submitting three general documents for “designated agentâ€, “agent designation†and “factory identification informationâ€, tire manufacturers must also determine whether they need to submit matching information on tires and rims. The regulations require that the tire manufacturers submit the list of rims matching the tires to the relevant departments of the Ministry of Communications. At the same time, it should be provided to all those who need this list. However, if this matching list has appeared in the publications published by the seven standards bodies approved by the Ministry of Transportation, it is not required to submit.
6) The Vehicle Safety Office of the Ministry of Transport conducts stringent random inspections of products every year, and strict requirements are imposed on manufacturers that do not meet the requirements.
Note: The new tire standard applies to all vehicle tires with a total rated mass of less than or equal to 4.5 tons. The tires will be tested at high speed under low atmospheric pressure. The test speed will be increased from 121 km, 129 km, 137 km per hour to 140 km, 150 km, and 160 km; the durability test mileage will reach 4080 km. , increased 1.5 times; also includes tire detachment, aging, air permeability and road hazard tests.
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