1. The applicant submits relevant company and product information.

Written application: You should ask UL Company to conduct a written test on your product. Company information: Provide detailed and accurate Chinese and English names, addresses, contacts, postal codes, telephone numbers and fax numbers of the following units. (a) Applicant company: the company that applies for product testing and is responsible for all engineering service fees (b). Listed companies: companies whose names are listed in various product catalogues published by UL Company (C). Factory: the manufacturer and producer of products. Product information: Product information should 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) The intended use of the product: for example, home, office, factory, coal mine, ship, etc. (d) Parts list: A detailed list of parts and models (classification number), grades and manufacturers' names of products. Please provide the name of the insulating material, for example: GE polycarbonate, LEXAN type 104. When the parts are certified or approved by UL, please prove the specific model of the parts and indicate their UL document number (E). Electrical performance: used in electronic and electrical products. Provide electrical schematic diagram (circuit diagram) and electrical performance table. (f) Structural drawing: For most products, it is necessary to provide structural drawing or explosion drawing, composition table, etc. (g) Product photos, instructions for use, safety and other items or installation instructions.

2. Make a decision according to the product information provided.

When the product information is complete, UL engineers will make the following decisions based on this information: UL standard on which the experiment is based, engineering cost of the test, test time, number of samples, etc. , and notify you in writing, and send the formal application form and tracking service agreement to your company. The application form indicates the cost limit, which is the highest project cost estimated by UL according to the test project. This fee limit shall not be exceeded without the written authorization of your company.

3. Apply for company remittance and send back the application form and samples.

Applicants for UL certification should sign the application form and the tracking service agreement, and send the application form back to UL. At the same time, send samples by bank remittance, post office or express delivery. Please give an appropriate description (such as name and model) of the samples submitted for inspection. Please send the application form and samples separately. For each application project, UL will assign a unique project number (Project No), and indicate the project number and the name of the application company when remitting money, sending samples and application forms, which is convenient for UL to check.

4. Product testing

After receiving the application form, remittance and experimental samples signed by your company, UL will inform you of the completion time of the experimental plan. Product testing is generally carried out in UL laboratory in the United States, and UL can also accept the audit data of third-party testing. The experimental samples will be returned or destroyed according to your requirements. If the product test results meet the requirements of UL standards, UL will issue qualified test reports and follow-up service procedures. The test report will detail the test situation, the indicators achieved by the sample, the product structure and the safety signs applicable to the product. Product description and UL regional inspector's instructions are included in the detailed rules of tracking service. A copy of the test report will be sent to the applicant company, and a copy of the tracking service details will be sent to each production plant.

5. the applicant is authorized to use the UL trademark.

The UL regional inspector in China will contact the production factory for the first factory inspection (initial production inspection). IPI)。 The inspector will check the storage of your products and their parts in the production line and warehouse to confirm whether the product structure and parts meet the detailed rules of tracking service. If required by the detailed rules, the regional inspector will also conduct witness experiments. When the inspection results meet the requirements, the applicant will be authorized to use the UL mark. After IPI, inspectors will go to the factory from time to time to check the product structure and witness the experiment. The inspection frequency is determined by the product type and output. Most types of products are tested at least four times a year. The inspector's inspection is to ensure that the products continue to meet the requirements of UL. Please inform UL before you plan to change the product structure or components. There is no need to repeat any experiment for minor changes. UL can quickly modify the tracking service rules so that inspectors can accept such changes. When UL thinks that the change of the product affects its safety performance, it needs to apply for the company to resubmit the sample for necessary testing. The cost of tracking service is not included in the test fee. If the product test results cannot meet the requirements of UL standard, UL will inform the applicant and explain the existing problems. After improving the product design, the applicant can resubmit the product. You should tell the UL engineer what improvements have been made to the product so that he can decide that the above steps are the steps to apply for UL certification.

Edit the inspection rules in this paragraph.

abstract

The inspection by UL inspector is basically a mechanical operation. According to different products, inspectors' inspection standards include announcements, procedures, fuui (if any, included in the detailed rules) and UL standards (if required in fuui). If the factory is producing UL products or UL products in stock when the inspector visits the factory, the inspector will take samples in one of the following ways: 1. Remove the parts from the production line and the complete products from the warehouse. 2. Extract all parts from the warehouse and add complete products to the production line. 3. Extract complete products from the warehouse for segmentation. The specific number of samples depends on the detailed rules, FUII (follow-up inspection instructions), SAP (standard attachments) or direct orders from UL Laboratories. Inspectors may not always check all products, but they will try to check all product categories or models within one year or at least two years. Generally speaking, UL is not too demanding on the production system of the factory. It is only required to measure instruments and equipment once a year, keep the factory's own inspection records, and have certain control measures for unqualified products. During the inspection, the on-site representatives (UL inspectors) will mainly pay attention to the product itself, and they will inspect the structure, components and assembly of the product one by one according to the above inspection basis. For parts and components related to product safety, the general rules will indicate that they are required to be UL certified products, and will indicate the manufacturer and model; Generally speaking, for injection-molded parts such as shells and shields, the detailed rules will specify their raw materials and size requirements. The site representative will check the above items and UL marks specified in the detailed rules.

spot-check

In addition, if the detailed rules or standards require on-site testing of products, the on-site representative will ask the factory inspector to do the corresponding testing, and the on-site representative will be present as a witness. If the detailed rules also require samples to be sent to UL for subsequent testing, the factory shall cooperate with inspectors to make corresponding samples. After the inspectors write the sample labels, provide the addresses and seal the samples, the factory will send the samples to the corresponding UL laboratories. If the products produced by the factory fully meet the requirements of the corresponding inspection standards of UL, and there is no other violation of the tracking service agreement, the inspector will issue a tracking inspection report; The factory representative shall sign the report after confirming its accuracy; One inspection is completed. If there is something inconsistent with the inspection standards in the inspection process, the inspector will issue a Change Notice according to the specific situation and take corresponding measures.

Remove the UL tag

If the UL mark is used for unauthorized products, the inspector will ask to delete the UL mark; For products that do not meet UL requirements, the inspector will remove the UL mark or rework it in the required factory to make it meet the requirements; If the factory disagrees with the above treatment, it can temporarily keep the UL mark, but the shipment must be stopped, and the inspector will inform the corresponding laboratory, and UL will reply to decide whether to keep the UL mark; If it is only a small problem that does not affect product safety, the inspector will make a temporary acceptance decision and report it to the corresponding laboratory; If there are some obvious standard errors, such as typing errors or unit errors, it will not affect the qualification of the ex-factory products, but as a document processing of UL, the inspector will also issue a change notice. Under normal circumstances, unless it is UL's responsibility, the inspector will ask the factory to explain the nonconformities to the corresponding laboratories, and UL will give the corresponding answers according to your explanation.

Final decision

Of course, the inspector's judgment is only temporary, and the final decision is of course in UL Laboratory. If the factory has any objection to the inspection practice, it can completely reflect it to the corresponding laboratory. At this point, the inspector is obliged to provide the corresponding contact person and contact information. After confirming that the contents recorded in the change notice are correct, the factory representative shall sign the notice.

UL certified factory inspection

The UL regional inspector in China contacted the production plant for the first factory inspection (IPI). The inspector will check the storage of your products and their parts in the production line and warehouse to confirm whether the product structure and parts meet the detailed rules of tracking service. If required by the detailed rules, the regional inspector will conduct witness experiments. When the inspection results meet the requirements, the applicant is authorized to use the UL mark. After IPI, inspectors will visit the factory from time to time, check the product structure and witness the experiment. The inspection frequency is determined by the product type and output, and most types of products are inspected at least four times a year (the cost of tracking service is not included in the inspection fee). The inspector's inspection is to ensure that the products continue to meet the requirements of UL. Please inform UL in advance before you plan to change the product structure or parts. For minor changes, there is no need to repeat any experiments, and UL can quickly modify the details of the tracking service so that inspectors can accept this change. When UL thinks that the change of the product affects its safety performance, it needs to apply for the company to resubmit the sample for necessary testing.

Edit this certification review.

Before the first batch of UL certified products are shipped, the local provincial China Import and Export Commodity Inspection Bureau (CCIB) authorized by UL will send people to the factory for inspection. Follow-up inspection is also needed every year.

Edit this tracking check.

brief introduction

As an integral part of UL certification, in order to ensure that the products listed and approved by UL continuously meet UL standards and requirements, UL has formulated a "follow-up inspection" system. "Follow-up inspection" means that UL sends field representatives around the world to the production site of local factories to conduct follow-up inspection on UL products. Its purpose is to ensure that the manufacturer's production process, inspection process and products always meet UL requirements by checking the production process, inspection process and products of the factory against UL standards and subsequent inspection rules.

Basis for follow-up inspection

After the site representative arrives at the factory, he will conduct inspection mainly according to the "Detailed Rules for Follow-up Inspection". Detailed Rules for Follow-up Inspection shall be compiled by UL Engineering Department after testing the samples submitted for inspection. This document includes a comprehensive description of the product, as well as photos and descriptions. It also stipulates various tests that manufacturers often have to do in the production process. Some tests require 100% products, such as stress testing. Part of the inspection can be carried out by sampling, and at the same time, it also stipulates the inspection items that must be randomly selected by the on-site representative during the on-site inspection in the factory. On-site representatives judge whether the test results are qualified according to the detailed information and regulations of these tests.

Track and check the classification of products.

Review is divided into first review and quarterly review. The cost of the first review is relatively high, and the follow-up inspection of UL is divided into R and L categories. Class L services are mainly used for products related to life safety, such as fire extinguishers, smoke detectors, fire doors and some products with considerable output, such as power equipment, wires and circuit breakers. For L-class products, manufacturers must order labels directly from UL and attach them to the products. Class R services are mainly used for electrical equipment, such as electric fans, televisions, hair dryers, ovens and other products usually produced by corresponding assembly lines.

Edit the charging standard in this paragraph.

UL's follow-up inspection fee consists of two parts, one is the annual service fee, and the other is the follow-up inspection fee. Its annual service fee is $580. Every January, UL will send the bill to the factory, which is the same for both R and L products. If the subsequent inspection rules require samples to be sent to the United States for testing, UL will also charge the factory for testing. There are great differences between R-type products and L-type products in tracking inspection costs:

R-class service

For R-class service, the cost of follow-up inspection is directly related to the number of inspections. If the factory is producing or storing UL products when inspectors visit the factory, the cost of each inspection is 280 dollars; On the contrary, it is $93.5; If the number of inspections increases due to product rework, the inspection fee will also be calculated at $93.5. The cost of inspection and the complexity of products are not directly related to the time required by inspectors in the factory. If it is a special inspection, it is generally determined by the length of stay in the factory and the inspection rate at that time, and the factory will be informed when UL decides to implement the special inspection. The bill usually arrives within one month after inspection.

L-level service

For L-level service, UL charges the follow-up inspection fee through the label. When a factory applies to UL to buy labels, the price of labels includes two aspects: the cost of labels and the service fee (that is, the tracking inspection fee of UL). Therefore, when the UL field representative inspects the factory, UL will no longer charge the factory unless a large number of products are reinspected or UL makes a special inspection of the factory. For R and L services, UL requires the factory to send the bill as soon as possible after receiving it, otherwise, UL will clear your documents when the time limit exceeds 3 months. If you still don't understand the cost, you can contact the local inspection center or UL Accounting Department.