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 recognition and flammability ratings rtp company. The test evaluates both the burning and afterglow times and dripping of the burning test specimen. Astm e2574 e2574m 12a standard test method for fire testing of school bus seat assemblies. All certification testing is performed by underwriters laboratory inc. Ul 94 underwriters laboratories test standard ul 94 is one of the most widely used flammability tests for determining relative flammability for plastic materials. Further tests like smallscale flammability and thermal aging can be performed. How the test works samples cut from fabric to be tested are mounted in a frame that hangs vertically from inside the flame.
Ul international thermoplastics testing center website test methods. Jul 01, 2018 ul 94 flame retardant tester is used for the flammability testing of plastic materials such as v0 v1 v2, hb, 5v, hf1 hf2, hbf material or foam, and used in consumer electric devices and. Burning and afterglow times after second flame application s. Ul 94, the standard for tests for flammability of plastic materials for parts in. Ul 94 is a test for flammability of plastic materials for parts in devices and appliances. Approval of ul 94 as an american national standard is maintained using the continuous maintenance process. Methods 94v and 94vtm are used for vertical burn, a more stringent test than 94hb. Cone calorimeter test has an advantage over bunsen. Ul94 vertical flame test instructional video youtube. Ul standard 94 identifies test methods for flammability of plastic materials for parts in devices and appliances. The 94hb test describes the horizontal burn method.
Determine test procedures and performance criteria that demonstrate improved repeatability over. Ul 94 test for flammability of plastic materials ecosafene. Vertical flame chamber astm d64 94 what this test is used for this test method measures the vertical flame resistance of textiles in general, but does not describe or evaluate the fire risk or fire hazard of those materials. Ul 94 flammability test method ul94 standard test method for. It measures the ability of plastic part to extinguish the flame after ignition and its dripping behavior in response to a small open flame or radiant heat source under controlled. This document is written to report the test methods used to certify premier conductive plastics flammability rating of ul94 v0 and ul945v. Infrared spectroscopy, thermogravimetric analysis and differential scanning calorimetry. Understanding ul 94 certifications and limitations lets shed some light on what the ul 94 standard and its associated flammability ratings are and, more importantly, what they are not. The first determines the materials tendency either to extinguish or to spread the flame once the specimen has been ignited.
Tests for flammability of plastic materials for parts in devices and appliances. Ul yellow card introduction the ul yellow card bears information relative to specific polymeric materials which a company has submitted to underwriters laboratories to be tested. 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 standard operating procedures university of texas. The ul 94 flammability test is intended to provide an indication of the acceptability of polymeric materials used in devices and appliances based on their flammability characteristics.
Ul product iq features an intuitive and userfriendly design that gives users free access to all certification information. Ul 94 is now harmonized with iec 60707, 606951110 and 606951120 and iso 9772 and 9773. Tests for flammability of plastic materials for parts in devices and appliances has a single approach for flame testing which provides flammability ratings of 1 horizontal and 2 vertical testing. Although the test methods and desired fire performance vary between tests, they. Ul94 test for flammability of plastic materials for. 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. E906 standard test method for heat and visible smoke release rates for materials and products. Ul 94 test for flammability of plastic materials for parts in devices. Ul 94 vertical burning classification test of superchute. Model building, life safety and fire codes include numerous requirements that products and materials include specified minimum flammability ratings.
It screening procedure for comparing the relative burning behaviour specimens made from. Ul 94 test for flammability of plastic materialsscope. Comments or proposals for revisions on any part of the standard may be submitted to ul at any time. The test evaluates both the flammability of the test specimen and any holes that are formed in sheets. Faa flammability requirements cont aerospace industry standards require either ipc 4101 flammability test be done on laminates making up a pwb before board is assembled or ul 94 v0 test on the finished pwb no industry requirement for 12sec vertical faa clarified that regulatory testing of electronic components requires. Flammability of polymers appalachian state university. Test for flammability of plastic materials for parts in devices and appliances. Astm nfpa ul iso iec astm e05 continued e814 standard test method for fire tests of through. 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. Ul 94 5v test 1ul 94 5v test 1ul 94 5v test 125mm vertical burning test25mm vertical burning test25mm vertical burning test ul 94. Hb three bar specimens, 125mm long and mm wide are to be tested. The test evaluates both the burning and afterglow times and dripping of the burning test. Tests for flammability of plastic materials for parts in devices and appliances standard by underwriters laboratories, 032820.
The total flaming combustion time may not exceed 250 seconds for the 10 flame applications for each set of 5 specimens. Test procedures for evaluating flammability of interior materials barbara c. Ul 94 rating ul subject 94 is a small scale flammability test. Ul 94 flammability test method ul 94 standard test method for testing the flammability of building products this fire test response standard for comparative surface burning behavior of building materials is applicable to exposed vertical surfaces such as walls. Ul recognition and flammability ratings for finished goods, frequently the ul recognition of component materials can eliminate the need for some tests on the final product. This test is meant to measure and describe the flammability of plastic. Plastic is a high molecular weight material composed of repeating organic molecules monomers. Ul 94 is the standard for safety of flammability of plastic materials for parts in electrical equipment and accessories. This method is used to determine the ul 94 5va and 5vb flammability ratings. Flammability tester is to determine the degree of flammability on the basis of the flammability test results after a variety of materials are tested under different conditions. A specimen is supported in a vertical position and a flame is applied to the bottom of the specimen.
The 945v test is for enclosures for products that are not easily moved or are attached to a conduit system. Determining risk of fire and steps taken to mitigate effects preselection testing focus on ul 94 v test. The first determines the materials tendency either to extinguish or to spread the flame once the. Test procedures for evaluating flammability of interior materials. This is a short instructional video about how to set up and execute a ul 94 standard vertical flame test. Under begin a basic search locate the ul file number space. Our flammability testing equipment is safe and accurate enough to be your best assistant in flammability. Ul94 v0, v1, v2 flammability standard ul yellow cards. Standard for tests for flammability of plastic materials for parts in devices and appliances ul revision. Test procedures for evaluating flammability of interior. Useful in testing small and nonstandard size material.
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. Horizontal burning test for classifying materials hb sunclear. This edition of ul 94, including all revisions, is approved as an american national standard. Uls testing method documents the ease of ignition, burning rate, flame spread and. Ul 94 vertical horizontal flammability testing equipment. Flammability testing is a critical part of ensuring safe and trustworthy consumer products. Test for flammability of plastic materials for parts in. The abbreviated test procedure includes applying the flame to the specimens in a horizontal position with a specified bunsen burner while holding the specimen at a 45.
Ul 94 flammability rating summary 5va surface burn burning stops within 60 seconds after. The specification that best meets needs is the flammability specification known as ul 94. The specimens may not burn with flaming combustion for more than 30 seconds after either application of the test flame. 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. Ul 94 ul flame rating ul94 ul 94 flame rating groups materials into categories based on their flammability. What links here related changes upload file special pages permanent link. 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. Burning time of each individual test specimen s after first and second flame applications. Different sectors of the industry adopt different flame test specifications.
The specimens may not burn with flaming or glowing combustion up to the holding clamp. This is solely based on their response to a small open flame under controlled laboratory conditions. The vw1 vertical wire burn rating is sometimes erroneously associated with ul 94, but it and some other flammability tests is described by ul 1581 reference standard for electrical wires, cables, and flexible cords. This version of the report has been produced from a. The standard determines the materials tendency to either extinguish or spread the flame once the specimen has been ignited. It is a more stringent test than ul 94 v 0 in several ways. The flame ratings and procedure are available in a separate document in eltek international university. Ul 94 vertical and horizontal flammability tester youtube. Quartz crystal clock oscillators xo spxo lvpecl pecl 2. Vertical burning test for classifying materials v0, v1 or v2. There are 12 ul 94 specified flame classifications assigned to materials based on the results of these smallscale flame tests. Ul 94, the standard for safety of flammability of plastic materials for parts in devices and appliances testing. Ul 94 standard for tests for flammability of plastic. This is the highest and most flame retardant level of the ul 94 ratings.
Ul 94 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 5v is a test standard for materials which are already classified as ul 94 v 0. The horizontal burning test is used to determine the hb flammability rating of a material. Ul 94 describes and measures the flammability properties of polymeric. This test is meant to measure and describe the flammability of plastic materials in response to heat and flame. Ul94 test for flammability of plastic materials for parts. After the flame has been extinguished, the procedure is repeated for a further 10 seconds. Underwriters laboratory ul94 ul testing is a method of classifying a materials tendency to either extinguish or spread a flame once it has been ignited and although originally developed by ul, it has now been incorporated into many national and international standards iso 9772 and 9773. This can significantly reduce both your cost and the time required for evaluation. The basic testing program for ul recognition involves three identification tests.
Faa flammability certification of electrical and electronic. The flammability rating is calculated for a test specimen as a function of the burning rate and taking account of the material thickness. During this test, a 20mmlong controlled flame from a methane gas burner is held for 10 seconds underneath the lower end of a vertically clamped test specimen. Ul 94 describes the 5v test method in which the test flame is applied for up to five applications for five. This standard contains revisions through and including may 22, 2001. This plastics flammability standard is issued by underwriters laboratories of the usa. Ul 94, the standard for safety of flammability of plastic. To find information about ul certified products and components quickly and easily, use ul product iq, an expansion of the former online certification directory. Ul 94 is defined as the standard for safety of flammability of plastic materials for parts in devices and appliances testing. The materials are listed on the card, hence, the phrase ul recognized. These requirements cover tests for flammability of plastic materials used for parts in devices and appliances.
Specimens that do not exhibit a burn through hole are classified 94 5v a specimens that burn through hole are. Understanding ul 94 certifications and limitations. Specifications ul t est procedures horizontal burning t est for 94hb classification 94hb horizontal flame class requirements thickness burning rate 18in 112 inmin test procedures and requirements ul94hb specimen. Fmvss 302 is a test procedure that specifies the burn resistance requirements for material used in the occupant compartments of motor vehicles.
Flame and fire hazard electrical testing for polymeric. Ecliptek, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Standard test method for measuring the comparative burning characteristics of solid plastics in a vertical position. They are intended to serve as a preliminary indication of their acceptability with respect to flammability for a particular application. Test procedures specified have been determined to be applicable to small components with an overall volume of less than 2500 mm. There are two separate tests and ratings for ul 94. The video of ul 94 flammability test procedure is attached in this web page. Standard test method for determining flammability characteristics of plastics and other solid materials using microscale combustion calorimetry. A secure, online source for increased visibility into your ul project files, product information, documents, samples and services. Industry applications for flammability test methods include textiles and consumer goods, aerospace and transportation, bedding, and furniture materials. Ul now developing standards for the canadian market click here for list ansican ul. Ul 1694 standard for tests for flammability of small. Ul94 standard for tests for flammability of plastic. Explanation of ul 94 rating for kydex 100 and kydex t.
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