UL profile

UL is short for Underwriter Laboratories Inc. UL,

The laboratory is the most authoritative in the United States, and is also the world's larger engaged in safety testing and certification

Institutions. It is an independent, nonprofit, professional organization that conducts experiments for public safety. It USES a

Scientific testing methods to study and determine the impact of various materials, devices, products, equipment, buildings, etc on life,

Whether there is any harm to the property and the degree of such harm; Identify, write, and publish standards and help reduce and

To prevent the loss of life and property data, while carrying out the business of fact-finding. Anyway, UL is both

The United States product safety testing and certification agency, is also the founder of the United States product safety standards, the ultimate

The aim is to obtain commodities with a fairly safe level for the market and to ensure the safety of human health and property

To the extent that product safety certification is an effective means of eliminating technical barriers to international trade, UL

It also plays a positive role in promoting the development of international trade. UL evaluates over 19,000 products annually

Components, materials and systems, and 21 billion UL marks on 71,000 products.

It was not until 1916 that UL became fully self-supporting. After nearly a century of development, UL has become a world known

It has a complete set of strict organization management system, standard development and product recognition

Certificate program. Currently, UL has five laboratories in the United States, with headquarters north of Chicago

In Northbrook, laboratories have been set up in Taiwan, Hong Kong and Japan. UL

Our network of subsidiaries and services spans the world, with 66 laboratories, tests and accreditation in 104 countries

Credit institutions. Together with CCIC, we established UL meihua certification co., LTD in China.

UL certified classification

The types of UL product certification and test services can be mainly divided into listing, recognition and classification:

1) LISTED: generally, LISTED names are only applicable to complete products and qualified people

All kinds of devices and devices that are replaced or installed in the field by the personnel. The products listed in UL include:

Home appliances, medical equipment, computers, business equipment, and electrical products that function in buildings,

Such as distribution systems, fuses, wires, switches and other electrical components. UL listed products, usually

Each product can be labeled with the UL column name. The use of the column name flag.

2) Recognized: the Recognized service is a Recognized product in the UL service

Products can only be used as components and raw materials on UL list, classification or other approved products. Approved to produce

The product is not structurally complete or is limited in use to ensure the desired safety performance.

In most cases, the tracking service for approved products falls into category R. Approved products in category L have electronics

Wire (AVLV2), processed wire (ZKLU2), wire harness (ZPFW2), aluminum wire (DVVR2),

And metal flexible tubes (DXUZ2). Approved products are required to carry an approved label.

3) Classification: a Classification service evaluates, or evaluates, only specific hazards of a product

Implement standards other than UL (including internationally recognized standards such as IEC and ISO)

Product evaluation. Generally speaking, most graded products are not products used by consumers, but industries

Or commercially used products. The classification mark in the UL mark indicates that the product is certain when identified by UL

Of the limits and scope of the provisions. For example, for industrial solvents such as chemicals, only for its reach

The range of possible fires at ignition temperature is evaluated. Classification service and listing service for certain products

The same, but generally only to a certain aspect of the product or several aspects of the evaluation, such as in the United States, medical

Equipment such as X-ray diagnostics is subject to national compliance with U.S. laws and regulations regarding the accuracy of radiation emission and beam.

But since UL only USES x-rays as a grading product, it only evaluates its mechanical, electrical and other properties

It's nonradiative in terms of its performance.

UL certified classification

4) multiple listing, multiple accreditation or multiple grading services: when a UL applicant is in receipt of the above

After the services are listed, approved or graded, the products are to be produced under the name of another company to meet the needs of the sales.

You can apply for multiple listing, multiple recognition or multiple rating services, in this case, get the listing, recognition

Or the manufacturer of the rating is allowed to use the name of another company in the product catalog, but the product is not the company's name

No., product code or other features that UL considers acceptable must be in addition to the original listing, endorsement or

Products of the same grade.

5) "AL" listing, accreditation or grading services: if UL applicant does not wish to be listed in the name of his own company

He may apply to use another firm (usually a retailer or wholesaler) for name, recognition or classification services

Nominally applying for listing, recognition or classification is called "AL" listing, recognition or classification service. With multiple column names,

The difference between multiple accreditation or multiple rating services is that the applicant is not listed as a celebrity.

6) system certification services: as a member of the international accreditation council, UL has extensive involvement in ISO9000 quality

Quality system certification, ISO14000 environmental protection certification, QS9000 automotive industry quality system certification and

AS9000 aircraft industry quality system certification services.

Information required for UL certification

1. Written application form

2. Company information of the applicant: company name, address, contact person, postcode, telephone and fax

3. Full name of the product

4. Product model, variety and classification number (in need of testing)

5. Product photos

6. Product specification

7. Functional schematic diagram

8. List of model differences

9. Copy of parts certificate

10. Circuit diagram (PCD board diagram)

11. Product installation manual

UL certification process

1. The applicant submits the relevant company and product information

2. According to the product data provided, the certification engineer shall determine: UL standard, engineering cost of testing and testing

Time, sample quantity, etc

3. Conduct product test (usually directly in UL test or UL authorized test qualification third-party laboratory

Data)

4. If the test passes, UL will issue the test qualification report and tracking service details (the test report will detail the test

The test condition, the index reached by the sample, the product structure and the safety mark suitable for the use of the product, etc. Tracking service

The specifications include a description of the product and instructions for the UL area inspector.

5. Conduct factory audit and pass the audit. The applicant is authorized to use UL mark

6. Supervision after obtaining the certificate

Note: 1. Most types of products are inspected at least four times a year. The inspectors inspect the products to ensure continuity

Continue to comply with UL requirements, please notify UL of any changes you plan to make to the product structure or components

With minor changes and no need to repeat any experiments, UL can quickly modify the tracking service specification to make it available to inspectors

To accept this change. When UL considers that changes to the product have affected its safety performance, it is necessary to apply to the company for a new application

Submit samples for necessary testing.

2. Factory audit fee and test fee shall be calculated separately

UL certification requirements

Factory inspection requirements:

Before the first factory inspection, the factory shall prepare the following documents for inspection:

Organization chart

Flow chart of quality control

Production flow chart

Product change flow chart or documentation

Training records of QC personnel and key positions

Incoming inspection related documents (such as standards, operating instructions, etc.)

Process (production) inspection related documents

Shipping inspection related documents

Equipment management related documents (such as calibration certificate, equipment ledger, etc.)

Nonconforming product control

2. Annual factory inspection

The annual factory inspection requires the same data and process as the first factory inspection, but the annual factory inspection

Inspection must be carried out for product consistency inspection. The factory should submit the required documents for consistency inspection. For specific requirements, please see

Factory checks user manual.

American UL certification audit factory content

Factory inspection contents:

1. Organizational structure and quality system

The position, responsibilities and working conditions of the quality department in the factory

Personnel status (actual cognition and operation of QC personnel and key stations);

2. Incoming inspection

Inspection conditions (environment, equipment, metering/calibration conditions, personnel)

Piling up and marking of articles to be inspected, qualified products and wastes

Incoming inspection implementation (SOP: including sampling standard, AQL level, inspection method and

Determination of documentation, personnel operational capability, test records, determination and release, etc.)

Supplier audit;

3, warehouse

Warehouse conditions (machine and parts)

Storage and marking of parts and finished products, storage and delivery of finished products

The process of hair collar material, hair collar material control file

Check BOM document (parts list)

4. Production process

Operation instruction and personnel operation of important positions

Product identification and traceability

Handling of nonconforming products during production

Operating instructions and original records of inspectors

American UL certification audit factory content

5. Routine inspection

Operation instruction and operation condition and test record

Safety test equipment measurement/approval and daily function test record

6. Sampling inspection before shipment (final inspection)

Work instruction for sampling inspection (sampling standard: AQL level and inspection method)

Check the record

7. Equipment inspection

Safety test equipment ledger

Methods and records of approval of major equipment

Internal approval methods and records

8. Conformity inspection of certified products (applicable to annual inspection)

Are copies of CDF, photo and certificate issued by UL retained and available

Maintain and be able to provide records of conformance checks performed within the plant

Arrange the production of certified products or keep the pre-produced certified products in the warehouse

UL inspector checks with structural data and photographic data for discrepancies or safety violations.

Precautions for UL certification

1. When applying for UL certification, the applicant must find a third party laboratory authorized by UL

2. Many applicants know that UL certification can be done by a third party laboratory authorized by UL or directly

When connecting to UL, choose to directly contact UL for testing. At this point, the applicant is advised to contact UL authorized third party laboratory

It will be better to handle it, because the third party laboratory authorized by UL can do the test rectification for you and then send the samples

Check UL, UL directly use data a pass, test fee can be done basically a time, if directly find

UL, each retest is recharged, such as lifting wire test fee of more than 70,000, retest three times to pass,

UL bills can run to more than 220,000

3. Receiving the confirmation letter of passing the test does not mean getting UL certificate. Please pass it before shipment to the United States

Factory audit before UL mark production shipment, please remember