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November 2, 2022 at 4:59 am

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ul certification introduction

UL is the abbreviation of the English insurer test (INC.). The UL Security Test Institute is the most authoritative in the United States and is also a larger civilian institution engaged in security tests and appraisal. It is an independent, non -profit -making professional organization for public safety. It uses a scientific test method to study the degree of the degree of harm and harm of various materials, devices, products, equipment, and buildings; determine, compile, and issue corresponding standards and help to reduce and prevent life from causing life to cause life The property of the property is lost, while conducting a factual research business at the same time. In short, it is mainly engaged in product safety certification and business safety certificate business. Its ultimate purpose is to obtain products with considerable safety and levels of goods, and contribute to the guarantee of personal health and property safety. As for the effective means of product security certification as an effective means to eliminate international trade technology barriers, UL has also played a positive role in promoting the development of international trade.
UL was founded in 1894. In the initial stage, UL owners provided funds to maintain funds by the fire insurance department. Until 1916, UL was completely independent. After nearly a century of development, UL has become a world -renowned certification agency, and it has a set of strict organizational management systems, standard development and product certification procedures. UL is managed by representatives of a safety expert, government official, consumer, educational, public undertaking, insurance industry, insurance industry, and standard departments. The daily work is handled by the president and vice president. At present, UL has five laboratories in the United States, headquartered in the town in northern Chicago, and has set up corresponding laboratories in Taiwan and Hong Kong.

ul certification tracking test

as an organic part of the UL certification. In order to ensure the name of UL, the recognition product continues to meet the standards and requirements of UL, UL formulated "tracking" tracking Inspection "system. "Tracking Inspection" means that UL sent on -site on -site representatives around the world to the local factory production site to track and test UL products. The purpose is to verify the production process, inspection process, and products of the factory, and to check the standards and tracking inspection rules of the UL to ensure that the production process, inspection process and products of the manufacturer always meet the requirements of UL.
The basis for tracking inspection
In order to ensure the implementation of the "tracking inspection" system of UL, a "tracking inspection agreement" has been signed between UL and manufacturers. On -site representatives will inspect the factory regularly and not in advance, and the factory shall not refuse the inspection of the on -site representative for no reason.
The on -site representatives were inspected according to the "tracking inspection rules" after the factory. The "Tracking Inspection Dormation" is compiled by the UL Engineering Department after testing the samples for inspection. This document includes a comprehensive description of the product, as well as photos] instructions. It also stipulates various experiments that manufacturing plants often do during production. Some tests require 100%of the product, such as pressure resistance. Some tests can be sampled. At the same time, the test items that on -site representatives must be spot -checked during the factory inspection. On -site representatives determine whether the test results are qualified according to the detailed information and regulations of such experiments.
The tracking test of the product
ul The tracking test is divided into R and L class. C type services are mainly used for products related to life, such as fire extinguishers, smoke detectors, fire doors and some products with quite large outputs, such as power equipment, wires and circuit breakers. For products that belong to C type, the production plant must directly order tags on UL on the product. The R service is mainly used for electrical equipment, such as electric fans, televisions, hair dryers, ovens, and other products that are usually produced with corresponding assembly lines.

UL certification factory review

UL certification products must be imported and exported by the local provincial and provincial levels authorized by UL before the first batch of shipments. The Commodity Inspection Bureau (CCIB) sent people to the factory for review. Also track and check every year.

UL certification inspection rules

ul inspection staff's inspection basically belongs to mechanical operations. Based on different products, the inspection of the inspectors is based on Bulletin, Procerer, Fuii (if there is in the rules) and UL standards (if there are requirements in the Fuii).
If the inspector when visiting the factory, the factory is producing UL products or UL products with inventory, the inspector will use one of the following methods to draw sample A complete product extracted in the warehouse.
2. Extract each component from the warehouse plus the complete products on the production line.
3. The full product is extracted from the warehouse for splitting.
The specific quantity of samples determines the rules, Fuii (tracking inspection instructions), SAP (standard attached page) or direct commands from the UL laboratory. Each tester does not necessarily test all products, but they will try to test all product categories or models within one year or at least two years.
In general, UL's requirements for the factory production system are not too high. As long as you need to measure the equipment once a year, save the factory's own inspection records, and have certain control methods for non -qualified products.
During the test, the representative (UL inspector) will focus on the product itself. They will check the structure, components and assembly according to the above inspection. For parts involving product safety, the general rules will indicate that the requirements are UL certified products, and the manufacturers and models will be indicated. For injection molding parts such as shells and hoods, the rules and size requirements will be specified in general. The on -site representative will check the UL tags specified in the above items and the rules.
It, if the rules or FUII or standards are required to conduct on -site testing of the product, the on -site representative will require the factory inspector to do the corresponding tests, and the on -site representative will witness. If the rules are also required to send samples to UL for tracking testing, the factory should cooperate with the inspector to make the corresponding sample. After the inspector wrote the sample label, the address is provided and the sample is seal, and the factory will be sent to the corresponding UL laboratory.
If the products produced by the factory fully meet the requirements of the corresponding inspection standards of the UL, there are no other places that violate the tracking service agreement, the inspector will issue a follow -up inspection report (REPORT); the factory representatives should Sign in the report; complete the test. If there is a situation that does not meet the inspection standards during the inspection process, the inspector will issue a change notice (Variation Notice) and take corresponding measures according to the specific situation.
For the use of UL labels for unauthorized products, the inspector will require removal of the UL mark; for the product does not meet the UL requirements, the inspector will request the factory to remove the UL mark or rework to meet the requirements; Agree, you can temporarily retain the UL mark, but the shipment must be stopped. For security, the inspector will make a temporary acceptance and report it to the corresponding laboratory; if it is some obvious standard errors, such as typing errors or unit errors, it does not affect the qualifications of the factory products, but as UL, as UL In the documentation, the inspector will also issue a notice of change. Under normal circumstances, unless it is UL's responsibility, the inspector will require the factory to explain the corresponding laboratories that do not meet the corresponding laboratory, and UL will give the corresponding reply based on your explanation.
of course, the judgment of the inspector is only temporary, and the final decision right is of course in various laboratories in UL. If the factory does not agree with the inspection method, it can be reflected to the corresponding laboratory. At this time, the inspector has the obligation to provide the corresponding contact and contact method. After confirming the content recorded in the change notice, the factory representatives should sign on the notice.

ul certification service items

ul product certification and test service types can be divided into column names, recognition and grading.
1) Lycal name (Listed): Generally speaking, the name is only applicable to the complete products and the various devices and devices of the qualified persons replaced or installed on the spot. : Household appliances, medical equipment, computers, commercial equipment, and various electrical products that work in buildings, such as power distribution systems, fuses, wires, switches, and other electrical components. Products named UL can usually marked UL's name signs on each product. Usage of the name logo.
2) Approval (): The recognition service is a project in the UL service. The product appraisal can only be used as components and raw materials on UL's name, classification or other recognition products. Applying that the product is not complete in structure, or there is certain restrictions on the use to ensure the safety performance that meets the expected. In most cases, the follow -up service of the recognition of the product belongs to the R class. The recognition products belonging to the L include electronic cable (AVLV2), processing wires (ZKLU2), wire beam (ZPFW2), aluminum wire (DVVR2), and metal deflection tube (DXUZ2). Applying product requirements with recognition marks.
3) Holmon (): Holocating services only evaluate the specific hazards of the product, or evaluate other standards other than the standards other than UL standards (including international recognition, such as IEC and ISO standards, etc.). Generally speaking, most hierarchical products are not products used by consumers, but products used in industry or commercial. The hierarchical logo in the UL logo shows that the product has certain restrictions and scope of regulations in UL appraisal. For example, chemicals such as industrial solvents only evaluate the scope of the fire that may occur when it reaches the temperature of the ignition point. The graded services of certain products are the same as the name service, but generally only evaluate a certain aspect or several aspects of the product. For example, in the United States, the equipment such as the medical X -ray diagnostic instrument must comply with US laws and related radiation launch and beams nationwide The stipulation of current accuracy, but because UL only uses X -rays as a hierarchical product, it only evaluates its mechanical properties, electrical performance and other non -radiation properties.
4) Multiple column names, multiple recognition or multiple hierarchical services: When a UL applicant obtains the above -mentioned name, recognition or hierarchical service, its product should produce in the name of another company to meet the needs of sales to meet the needs of sales. You can apply for multiple listed names, multiple recognitions or multiple hierarchical services. In this case, the manufacturer who gets the name, recognition or hierarchy is allowed to use another company in the product list. In addition to other characteristics of product codes or UL companies considering acceptable, they must be consistent with the original name, recognition or hierarchical product.
5) "AL" list name, recognition or hierarchical service: If the UL applicant does not want to obtain the name, recognition or hierarchical service in the name of his company, he can apply for another business name (usually retailer or wholesaler ) The name of the nominal application, recognition or grading, is called "al" list name, recognition or hierarchical service. The difference between it and multiple hierarchical services is that its applicant is not a celebrity.
6) System certification service: As one of the international recognition committees, UL is widely involved in ISO9000 quality system certification, ISO14000 environmental protection certification, QS9000 automotive industry quality system certification, and AS9000 aircraft industry quality system certification services. So far, a total of 116 factories have obtained UL system certification in China; 21 of them are ISO9001 certification, 85 are ISO9002 certification, 1 is ISO14001 certification, and 9 are QS9000 certification.
7) UL's other services: such as proof services, inspection services, truth judgment services, research services, etc. No introduction here.

UL certification process

Step Step of the UL logo of the product application:

1. n Written application: You should inspect UL companies in writing in writing.

The company information: Provide the following units with detailed and accurate names, addresses, contacts, postal codes, telephones and faxes.

(A). Application company: Company proposed a product testing application and responsible for all engineering service costs

(b). Name Company: Various types of published in UL Company Product directory lists the company

(C). Production factory: Product manufacturer and producer.

Se product information: Product information should be provided in English. First determine whether your product belongs to the scope of UL detection, you can consult UL's office in Guangzhou and Shanghai.

(a). Product name: Provide the full name of the product.

(b). Product model: detailed product model, variety, or classification number of all the experiments.

(c). The purpose of product pre -book: For example: family, offices, factories, coal mines, ships, etc.

(d). Parts table: The names and models (classification numbers), rated value, and manufacturer of manufacturers of the product of the product are listed in detail. For insulating materials, please provide the name of the raw materials, for example: GE, Lexan Type 104. When the parts have obtained UL certification or recognition, please prove the specific model of the component and indicate its UL file number.

(e). Electrical performance: For electronic electrical products. Provide electronic schematic diagrams (line diagrams) and electrical performance tables.

(f). Structural diagram: For most products, the structure diagram or explosion diagram, ingredient table of the product must be provided.

(g). Product photos, use instructions, safety, etc. or installation instructions.

2. People make a decision based on the product information provided
n When the product information is complete, UL engineers make the following decisions based on the information: Experiments The UL standards, the cost of the test, the time of the test, the number of samples, etc., inform 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 maximum engineering cost estimated by UL based on the test item. Without the written authorization of your company, the cost limit cannot be exceeded.

3. Application for company remittance, return application form and sample

The form is returned to the UL company. At the same time, through the bank remittance, the sample is sent in the post office or in the mode of express delivery. Please send it separately for the application form and samples. For each application project, UL will specify the unique project number (Project No.) to indicate the project number and apply for the company's name when remittance, samples and application forms, so that UL is checked.

4. Product detection

In after receiving the application form, remittance, and experimental sample signed by your company time. Product testing is generally performed in UL laboratories in the United States, and UL can also accept the review of third -party testing data. Experimental samples will be returned or destroyed according to your requirements.

If product detection results meet the requirements of the UL standard, UL will issue a testing report and tracking service detailed test report on the testing report, the indicators, product structure and suitable samples, product structure and suitable for the test situation, the samples, and the suitable for the test report. Safety signs used in this product. In the tracking service rules, the description of the product and the guidance of the UL regional inspector. A copy of the test report is sent to the application company, and a copy of the tracking service rules is sent to each production factory.

5. The applicant obtained the authorized UL logo

IPI), inspectors check your products and its parts in the production line and warehouse storage, to confirm whether the product structure and parts are consistent with the tracking service rules. When the inspection results meet the requirements, the applicant obtains the UL logo authorized.

Following the IPI, the inspector will go to the factory to check from time to time, check the product structure and conduct witness experiments. The frequency of the inspection is determined by the product type and production. Second, the inspector's inspection is to ensure that the product continues to be consistent with the UL requirements. Before you plan to change the product structure or component, please notify the UL. For changes that change less, you do not need to repeat any experiments. UL can quickly modify the tracking tracking tracking and tracking. Service details so that the inspectors can accept this change. When UL believes that the product changes affect its safety performance, the company needs to apply for the company to submit the sample for the necessary testing.

The cost of tracking service is not included in the test cost, UL will track the inspection service to send you another invoice.

If product detection results cannot meet UL standard requirements, UL will notify the applicant to explain the existing problems. After the applicant improves the product design, you can re -submit the product. You should tell UL engineers that the product does it to do it What improvements are made so that the above decision is the step of applying for UL certification.

UL certification professional terms

"al" listing
appendix (attached page)
applicant (applicant)
page (authorized page)
category control number Applicable conditions)
Control Number (control number)
factory (factory logo)
factory (factory inspection)
"al" listing, or (multiple columns or recognition)
The applicant's application and authorization shall be established in the name of the other party (the celebrity) of the applicant (the celebrity). Individual or enterprise
appeals procedure (appeal procedures)
if the customer has different opinions on the results of the project test or tracking inspection Don't worry about endangering conclusions in the future. If you cannot get a satisfactory reply at this level, the customer can appeal to the higher level until the president.
appendix (attached page)
The rules, including the responsibilities of factories and on -site representatives and the requirements for related testing. It may also describe the tests made to UL's samples.
applicant (applicant)
The enterprise or individuals who are tested by UL for their components, products or systems. Legally, this party will be responsible for testing and tracking services, and has the right to all information related to the results of the test results. See an agent.
Page (authorized page)
The first page is archived in the follow -up service factory inspection rules, with the corresponding tracking inspection service (L or R class) and allowable certification signs
category Control Number (CCN) (Category Control Number)
UL list name, recognition, and classification services in different product categories represents form. For example, AVLV2 represents the electronic line; qowz means portable lamps. Generally, XXXX is a name product, XXXX2 is an recognition product. XXXX7 indicates that it meets the Canadian standard products, and XXXX8 represents the recognition product that meets the Canadian standard.
Component (parts)
The part of the product, in addition to participating in the test of the entire product as a complete product, also needs to test its performance and/or structure separately. Parts can be named, recognized or non -named parts.
Condition of (applicable conditions)
This projects are listed in the report of recognition or non -listed parts, but they are not used as a basis for inspection of on -site representatives. Based on the test results of these projects, the restrictions and conditions of the components when used and the complete product are marked. For example, in the report of a kind of switch, it may indicate that the product may only be applied to a current below 1A or a temperature below 125C.
CONTROL NUMBER (control number)
ul is specified by UL. Depending on the types of different product categories and different tracking services, the control number may be changed regularly.
factory (factory logo)
The identification mark used by producers with the same product in different factories is used to distinguish which factory produced in a certain product.
factory (factory inspection)

The materials to be submitted in the UL certification

Sek of product application:

1. Application People submit related companies and product materials

The written application: You should inspect UL companies in writing in writing.