UL 94-2016 pdf download – Tests for Flammability of Plastic Materials for Parts in Devices and Appliances.
5.4 Burner Mounting Fixture – Capable of positioning the burner at an angle of 20 degrees from the vertical axis. (Used for the test procedure in 500w Vertical Burning Test; 5VA or 5VB Section 9 only.) 5.5 Ring Stands – Laboratory ring stands with clamps or the equivalent, for horizontal or vertical positioning of the specimen and/or the wire gauze. Laboratory ring stands with clamps adjustable to the desired angles and heights, or a support gauze holder constructed from aluminum or steel, or equivalent equipment. 5.6 Timing Devices – Accurate to 0.1 second. 5.7 Measuring Scale – Graduated in mm. 5.8 Gas Supply – A supply of technical grade methane gas (min. 98 percent pure) with regulator and meter for uniform gas flow. 5.9 Wire Gauze – Having approximately 20 openings per 25 mm, made with 0.43 ±0.03 mm diameter iron or steel wire and cut to approximately 1 25 mm squares. (Used for the test procedure in Horizontal Burning Test; HB Section 7 only.) 5.1 0 Conditioning Room or Chamber – Capable of being maintained at 23 ±2°C and a relative humidity of 50 ±1 0 percent. 5.1 1 HB Support Fixture – A metal support fixture for testing specimens that are not self-supporting. See Figure 7.2 (Used for the test procedure in Horizontal Burning Test; HB Section 7 only.) 5.1 2 Micrometer – Capable of being read to 0.01 mm. 5.1 3 Cotton – A supply of absorbent 1 00 percent cotton. 5.1 4 Desiccator – A desiccator containing anhydrous calcium chloride, or other drying agent, maintained at a relative humidity not exceeding 20 percent at 23 ±2°C.
5.1 9 Foam Support Fixture – A metal support fixture capable of holding the support gauze in 5.1 8 including height adjustment to allow for burner height variations. See Figure 1 2.1 . (Used for the test procedure in Horizontal Burning Foamed Material Test; HBF, HF-1 , or HF-2… Section 1 2 only.) 5.20 Manometer/Pressure Gage – A gage capable of measuring to 200 mm of water, with increments of 5 mm. 5.21 Flow Meter – A rotameter calibrated in accordance with the Practice of Rotameter Calibration, D 31 95, with correlation curves appropriate for the gas, or a mass flow meter with ±2 percent accuracy. 6 Conditioning 6.1 Specimens are to be preconditioned in accordance with ASTM D 61 8 (ISO 291 ) at 23 ±2°C and 50 ±1 0 percent relative humidity for a minimum of 48 hours. 6.2 Specimens for certain tests are to be preconditioned in an air-circulating oven for 1 68 ±2 hours at 70 ±2°C and then cooled in the desiccator for at least 4 hours at room temperature, prior to testing. 6.3 Once removed from the pre-conditioning environment, specimens shall be tested within 30 minutes. 6.4 All specimens are to be tested in a laboratory atmosphere of 1 5 – 35°C and ≤ 75 percent relative humidity. 6.5 Cotton shall be conditioned in the desiccator for at least 24 hours prior to use. 6.6 Once removed from the desiccator, the cotton shall be used within 30 minutes. TESTS 7 Horizontal Burning Test; HB (ASTM D 635 or IEC 60695-1 1 -1 0) 7.1 Test criteria 7.1 .1 A material shall be classified HB when tested as described in 7.2.1 – 7.5.1 0.