Needle flame test is to use simulation technology to evaluate the ignition risk of small flame caused by fault conditions inside the equipment. It is used to simulate the ignition source of small flame is the flame generated by the burner.

Needle flame test

Needle flame test is to use the needle to butane, produces a peak from the needle tip into the flame height is 12 mm + / - 1 mm of flame, harsh level according to the selected standard stipulated time (60 seconds, 30 seconds, 10 seconds, for example, the longer the more harsh) on the sample surface, the top of the needle on the side with the sample surface side surface distance of 5 mm, or on the surface and the distance of 8 mm. The bottom layer is the same as glowing-wire test. If the sample does not generate flame or the flame automatically goes out within 30 seconds after application, and the droplet does not ignite the bottom layer, the needle flame test is judged to be passed. Shanghai thousands of real production needle flame test instrument, in the product due to fault conditions, such as through the leak path of fault current, components or parts of overheating, such as bad contact also may cause fire, it may shoot over to a nearby parts again, this experiment is simulated under fault conditions inside the product produced by the small flame, simulation technology is used to evaluate the fire risk. For small parts (or components) glow-wire test or horizontal - vertical combustion test method is not suitable, can refer to needle flame test method. If the sample ignites during glow-wire test, needle flame test is required for the resulting combustion hazard. It is suitable for electrical and electronic products, household appliances components, parts, such as: junction board, centrifugal switch, rice cooker socket.

In addition, the fire resistance of materials is closely related to the addition of flame retardants. Suitable flame retardant can make the tested material can not reach the ignition point all the time in the test, or reach the ignition point and the ignition will be automatically extinguished. Can be seen in the needle flame test, some did not add flame retardant plastic material under a certain temperature or time harsh level may play a more than 30 seconds after combustion and combustion time, but after add appropriate flame retardants, under the harsh temperature or time level may become doesn't burn or although light-off in hot wire or 30 seconds automatically after you remove the needle flame extinguished, which meets the requirement of standard.

Know more can kick TF02 Needle Flame Tester .

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