Introduction to UL certification in the United States

UL is mainly engaged in product safety certification and operation safety certification business. Its purpose is to obtain goods with a considerable level of safety for the market, and to contribute to the guarantee of personal health and property safety. As an effective means to eliminate technical barriers in international trade, UL also plays an active role in promoting the development of international trade. UL was founded in 1894. In the initial stage, UL mainly relied on the funds provided by the fire insurance department to maintain its operation. Until 1916, UL was fully independent. After nearly a hundred years of development, UL has become a world-renowned certification body, with a set of strict organizational management system, standard development and product certification procedures. UL is managed by a Council composed of representatives of safety experts, government officials, consumers, education, public utilities, insurance and standards departments, and its daily work is handled by the president and vice president. UL has five laboratories in the United States, headquartered in Northbrook, north of Chicago, and corresponding laboratories in Taiwan and Hong Kong. In the United States, for consumers, UL is a symbol of safety signs. Globally, UL is one of the reliable qualified evaluation providers of manufacturers. UL Mark is usually marked on the product and / or product package to indicate that the product has passed UL certification and meets the requirements of safety standards.

UL identification

Benefits of UL certification

1. The whole U.S. market attaches great importance to product safety; when consumers and purchasers purchase products, they will choose products with UL certification mark.

2. UL has a history of more than 100 years, and the image of safety is deeply rooted in consumers and the government. If you do not directly sell products to consumers, middlemen will also require products to have UL certification marks to make products sell well.

3. U.S. consumers and buyers are more confident in their products.

4. The federal, state, county and municipal governments of the United States have more than 40000 districts, all of which recognize the UL certification mark.

UL certified product services

1. Listed: [1] generally speaking, UL certification is only applicable to complete products and various devices and devices that are replaced or installed by qualified personnel on site. It belongs to various products of UL Listed services, including household appliances, medical equipment, computers, commercial equipment and various electrical products that function in buildings. Such as distribution system, fuse, wire, switch and other electrical components. Products listed by UL can usually be labeled with UL's column name mark and the usage of the column name mark on each product.

2. Recognized: the recognized service is a project in UL service. The products identified can only be used as components and raw materials in UL listing, grading or other recognized products. The approved products are not complete in structure or have certain restrictions in use to ensure the expected safety performance. In most cases, tracking services for approved products fall into category R. The approved products of L category include electronic wire (avlv2), processed wire (zklu2), harness (zpfw2), aluminum wire (dvvr2), and metal flexible pipe (dxuz2). Approved products shall be marked with approval mark.

3. Classification: the classification service only evaluates the specific hazards of products, or the products that implement other standards (including internationally recognized standards, such as IEC and ISO standards, etc.) other than UL standards. Generally speaking, most grading products are not products used by consumers, but products used in industry or commerce.

The classification mark in the UL Mark indicates that there are certain restrictions and specified range when the product is identified by UL. For example, for chemicals such as industrial solvents, only the range of fire that may occur when they reach the ignition point temperature is evaluated. The grading service and listing service of some products are the same, but they generally only evaluate one or several aspects of the products. For example, in the United States, medical X-ray diagnostic apparatus and other equipment shall comply with the laws of the United States and the regulations on radiation emission and beam accuracy nationwide. However, because UL only regards X-ray as the grading product, it only evaluates its mechanical performance, electrical performance and other aspects Non radiation performance.

4. Multiple listing, multiple recognition or multiple classification services: when an UL applicant obtains the above listing, recognition or classification services, its products are to be produced in the name of another company to meet the needs of sales, it can apply for multiple listing, multiple recognition or multiple classification services. In this case, the listed, recognized or classified manufacturer is allowed to use the products The name of another company in the list, but the product must be consistent with the original listed, approved or graded product except for the company code, product code or other characteristics that UL considers acceptable.

5. "Al" listing, recognition or grading service: if UL applicant does not want to obtain listing, recognition or grading service in the name of his own company, he can apply for listing, recognition or grading in the name of another business (usually retailer or wholesaler), that is, "Al" listing, recognition or grading service. It differs from multi listing, multi recognition or multi rating services in that its applicant is not a nominee.

6. System certification service: as one of the members of the International Accreditation Committee, UL has been widely involved in ISO9000 quality system certification, ISO14000 environmental protection certification, QS9000 automobile industry quality system certification and as9000 aircraft industry quality system certification services. In China, 116 factories have obtained UL system certification, including 21 ISO9001, 85 ISO9002, 1 ISO14001 and 9 QS9000.

7. UL's other services: such as certification services, inspection services, factual judgment services, research services, etc.

Information required for UL certification

1. The applicant submits a written application for relevant company and product information: you should request UL company to test your company's products in written form.

Company information: provide detailed and accurate name, address, contact person, postal code, telephone and fax of the following units in Chinese and English.

(a) . application company: the company that applies for product testing and is responsible for all engineering service fees

(b) . listed companies: companies listed in various product catalogs published by UL company

(c) Production plant: the manufacturer and producer of a product.

2. Product data: Product data shall be provided in English.

(a) . Product Name: provide the full name of the product.

(b) . product model: list all product models, varieties or classification numbers that need to be tested in detail.

(c) . intended use of the product: for example: home, office, factory, coal mine, ship, etc.

(d) . parts list: detailed list of parts and models (classification number), rating and manufacturer's name. For insulating materials, please provide the name of the raw material, for example: Ge polycarbonate, Lexan type 104. When the parts have been UL certified or approved, please prove the specific model of the parts and indicate their UL file number

(e) . electrical performance