Ul94 vertical flame test instructional video youtube. Understanding ul 94 certifications and limitations. An investigation of the ul94v plastics flammability test. This plastics flammability standard is issued by underwriters laboratories of the usa. Prior to testing, five specimens were conditioned for 168 hours at a temperature of. Tests for flammability of plastic materials for parts in devices and. Characterization of the burning behaviour of plastics by a. International organization for standardization iso 9772. This article is the first in a series intended to answer some common questions regarding this standard, and is based upon the ul standard 94 text. Ul 94 flammability test method ul94 standard test method. It conforms to all five ul 94 horizontal and vertical bunsen burner tests and to the associated us and international. Perform flammability classification in accordance with paragraph 8 of ul 94 fifth edition, test for flammability of plastic materials for parts in devices and appliances 50w 20 mm vertical burning test. Equipment gse, and facilities used during assembly, test, and flight operations.
They are intended to serve as a preliminary indication of their acceptability with respect to flammability for a particular application. Ul 94 standard for tests for flammability of plastic materials for. Ul 94, the standard for safety of flammability of plastic. Included are requirements, criteria, and test methods for evaluating the flammability, offgassing, and compatibility of materials. Plastic is a high molecular weight material composed of repeating organic molecules monomers. The standard determines the materials tendency to either extinguish or spread the flame once the specimen has been ignited. Ul94 test for flammability of plastic materials for. The 94hb test describes the horizontal burn method. The test is also called the vertical wire vw test because it tests the materials ability to resist fire along a vertically suspended wire.
This is a short instructional video about how to set up and execute a ul94 standard vertical flame test. A total of 10 specimens 2 sets are tested per thickness. Test procedures specified have been determined to be applicable to small components with an overall volume of less than 2500 mm. A burner flame is applied to the free end of the specimen for two 10 second intervals separated by the time it takes for flaming. Ul94 standard for tests for flammability of plastic. Introducing milscreen pc series ul94v2 flammability test. These revisions to ansiul 94 are being issued to address the following changes. Flammability ul 94 v ul thermoplastics testing center. Ul 94 flammability rating summary 5va surface burn burning stops within 60 seconds after. Test procedures for evaluating flammability of interior. Ul 94 flammability testing is the first step toward obtaining a plastics recognition and subsequent listing in the plastics recognized component directory former known as yellow cards. Ul 94 tests are preselection tests for alternative end product tests. Ul 94 flammability test method ul94 standard test method for testing the flammability of building products this firetest response standard for comparative surface burning behavior of building materials is applicable to exposed vertical surfaces such as walls. The first determines the materials tendency either to extinguish or to spread the flame once the specimen has been ignited.
Ul 94 standard for tests for flammability of plastic. The video of ul 94 flammability test procedure is attached in this web page. These requirements cover tests for flammability of plastic materials used for parts in devices and appliances. The materials resistance to ignition and surface tracking characteristics is described in ul 746a, which is similar to the test procedures described in iec 60112, 60695 and 60950. Ul 94 v0, v1, v2 vertical testing procedure the 94v vertical burn test uses a standard bar specimen which is held at one end in the vertical position. Test standards used to make this determination but are not limited to the following. Horizontal vertical flame chamber tester with touch screen. Ul 94, the standard for safety of flammability of plastic materials for parts in devices and appliances testing there are two types of preselection test programs conducted on plastic materials to measure flammability characteristics. Tests for flammability of plastic materials for parts in devices and appliances has a single approach for flametesting which provides flammability ratings of 1 horizontal and 2 vertical testing. This test is mainly used for quality control, production control and material comparisons. Astm e 162, test method for surface flammability of materials using a radiant heat. This test measures the selfextinguishing time of the vertically oriented polymer specimen. Model building, life safety and fire codes include numerous requirements that products and materials include specified minimum flammability ratings.
This test method is described in the standard for test methods for fire resistance of roofcovering materials, ul 790. The second test program measures the ignition resistance of the plastic to electrical ignition sources. The ul test for flammability of plastics ul94 1 is actually comprised of six separate tests, but this study will focus only on the vertical burning test, ul94v. The series of horizontalvertical flame test apparatus are designed and manufactured according to the standard and related requirement of ul94,iec60695112, iec606951, iec60695114, iec606951120. The test evaluates both the burning and afterglow times and dripping of the burning test specimen. A fire test can be conducted to determine the degree of flammability. Provisions of this standard will be included, as applicable, in all future contracts and programs involving space vehicles, payloads. If area 10 ft2, then spread of flame per ul 723 similar to astm e84 or astm e162 radiant panel see section 19.
Ul94 v0, v1, v2 flammability standard ul yellow cards. Standard test method for measuring the comparative burning characteristics of solid plastics in a vertical position. Ul 94, the standard for safety of flammability of plastic materials for parts in devices and appliances testing, is a plastics flammability standard released by underwriters laboratories of the united states. Underwriters laboratories ul 94 flammability testing. Burning rate ul 94 hb horizontal burning rate ul 94 hbf horizontal burning rate ul 94 5v vertical burning rate ul 94 v vertical burning rate ul 94 vtm vertical flame propagation of elastomers astm c 1166 flammability, enclosure ul 746c, sect. This method is used to determine the ul 94 vtm0, vtm1 and vtm2 flammability ratings of thin materials.
Specifications ul t est procedures horizontal burning t est for 94hb classification 94hb horizontal flame class requirements thickness burning rate 18in 112 inmin procedure three specimens are. Although the test methods and desired fire performance vary between tests, they. The apparatus is supplied as a complete system incorporating all the features necessary for ease of use and safety. Visit our website, sg to know more about our products and services. Materials testing for manufacturers and retailers ul. Not for use in food, drug, cosmetic or medical device manufacturing. The top of the test specimen is clamped to a stand and the burner is placed directly below the specimen. A specimen is supported in a horizontal position and is tilted at 450. This document explains the underwriters laboratory standard for testing the flammability properties of plastic materials used for parts in devices and appliances. Test procedures in ul 1694 are applicable to small components with an overall volume of less than 2500 mm3 0.
Ul 94 vertical burning classification test of superchute. The various flammability tests are all similar in that they 1 orient a test sample. Iec 610101 is the comprehensive standard for test, measurement and laboratory equipment. Table 1 lists the ignition time tign as well as the after flame time taf for the plastics tested after the procedure described above. Ul 1694 standard for tests for flammability of small.
The materials tested here strongly differ with respect to these values. Astm d 4804, test method for determining the flammability. The flammability test is used to determine the relative rate of burning of selfsupporting plastics. Ul certification customers have free access to ul standards, not including ul iec based standards. Flame and fire hazard electrical testing for polymeric. Ul 94 test for flammability of plastic materialsscope. Ul 94 flammability testing is the first step toward obtaining a. Test for flammability of plastic materials for parts in. Ul standard 94 identifies test methods for flammability of plastic materials for parts in devices and appliances. This method is used to determine the ul 94 v0, v1 and v2 flammability ratings.
Ul 94 test for flammability of plastic materials for parts in devices. Ul 94 flame chamber the ftt ul 94 tests for flammability of plastic materials giving a preliminary indication of their suitability for a particular application. Within the specification, glow wire testing is used to evaluate flammability of nonmetallic materials supporting current carrying connections used within the appliance. Below is an overview of the most widely used north american fire test, which is called vw1 ul 1581. Standard for tests for flammability of plastic materials for parts in devices and appliances ul standard. Safety of household and similar electrical appliances iec 603351 is a general specification that governs the safety of household appliances. Ul 94 flammability testing is the first step toward obtaining a plastic recognition and subsequent listing in the plastics recognized component directory former known as yellow cards. Ul94 test for flammability of plastic materials for parts in devices and appliances by caroline gold overview plastics have become one of the most useful types of material known to mankind. Ul 94, the standard for tests for flammability of plastic materials for parts in. In this 30minute webinar, walter hofmair shares his expertise on the major changes of amendment 1 to iec 610101, 3rd ed. Ul 94 is defined as the standard for safety of flammability of plastic materials for parts in devices and appliances testing. The flame ratings and procedure are available in a separate document in eltek international university. Failure to pass the ul 94 v test is a precondition of all vtm ratings. Five specimens of each thickness are tested after conditioning for 48 hours at 23 degrees c and 50% rh.