UL 94:2004 pdf download.Test for Flammability of Plastic Materials for Parts in Devices and Appliances.
8.5.2 The methane gas supply to the burner shall be arranged as in Figure 7.3 and adjusted to produce a gas flow rate of 105 mImin with a back pressure less than 10 mm of water. See ASTM D 5207.
8.5.3 Adjust the burner to produce a blue flame 20 ±1 mm high. The flame Is obtained by adjusting the gas supply and air ports of the burner until a 20 ±1 mm yellow-tipped blue flame is produced. Increase the air supply until the yellow tip just disappears Measure the height of the flame again and readjust it if necessary.
8.5.4 The test flame shall be calibrated in accordance with ASTM D 5207at least once a month and when the gas supply is changed, test equipment is replaced, or when data is questioned.
8.5.4 rev.sed July 10. 1998
8.5.5 Apply the flame centrally to the middle point of the bottom edge of the specimen so that the top of the burner is 10±1 mm below that point of the lower end of the specimen, and maintain it at that distance for 10 ±0.5 seconds, moving the burner as necessary in response to any changes in the length or position of the specimen. If the specimen drips molten or flaming material during the flame application, till the burner at an angle of up to 45 degrees and withdraw It just sufficiently from beneath the specimen to prevent material from dropping into the barrel of the burne while maintaining the 10 ±1 mm spacing between the center of the top of the burner and the remaining portion of the specimen, ignoring any strings of molten material. After the application of the flame to the specimen for 10 ±0.5 seconds, immediately withdraw the burner at a rate of approximately 300 mm/sec. to a distance at least 150 mm away from the specimen and simultaneously commence measurement of the after flame time t In seconds. Record t1.
8.5.3 Adjust the burner to produce a blue flame 20 ±1 mm high. The flame Is obtained by adjusting the gas supply and air ports of the burner until a 20 ±1 mm yellow-tipped blue flame is produced. Increase the air supply until the yellow tip just disappears Measure the height of the flame again and readjust it if necessary.
8.5.4 The test flame shall be calibrated in accordance with ASTM D 5207at least once a month and when the gas supply is changed, test equipment is replaced, or when data is questioned.
8.5.4 rev.sed July 10. 1998
8.5.5 Apply the flame centrally to the middle point of the bottom edge of the specimen so that the top of the burner is 10±1 mm below that point of the lower end of the specimen, and maintain it at that distance for 10 ±0.5 seconds, moving the burner as necessary in response to any changes in the length or position of the specimen. If the specimen drips molten or flaming material during the flame application, till the burner at an angle of up to 45 degrees and withdraw It just sufficiently from beneath the specimen to prevent material from dropping into the barrel of the burne while maintaining the 10 ±1 mm spacing between the center of the top of the burner and the remaining portion of the specimen, ignoring any strings of molten material. After the application of the flame to the specimen for 10 ±0.5 seconds, immediately withdraw the burner at a rate of approximately 300 mm/sec. to a distance at least 150 mm away from the specimen and simultaneously commence measurement of the after flame time t In seconds. Record t1.
