Glow wire flammability test with the Glow Wire test apparatus

Testing Flammability with Glow Wire Test Apparatus and Needle Flame Apparatus is used to determine if a substance can be ignited and pose a risk of fire. The testing helps us to use the substances safely and gather information for the correct use of them, durability and behavior of the substances. There are two methods for Flammability testing: Glow Wire Apparatus and Needle Flame Apparatus. What is the difference between those two methods?

Firstly, in Glow WireTest Apparatus, a conclusion on flammability of a substance is deducted by immersing a glow wire into it. For example, if a substance is flammable, a glow wire can be immersed into it to find if it will catch fire. If the glow wire starts to spin and sparks are produced, the substance is flammable and fire can be initiated to occur in reaction to the substance. Glow Wire testing is used to find out if a substance is flammable but cannot accurately estimate the time of the flammability.

Contrarily, Needle Flame Apparatus is another type of flammability testing in which flammability of substances can be judged by bringing a flammable substance and spark source (such as electrodes) together to produce a flame. Besides used to test flammability of substances, Needle Flame Apparatus can also test the flammability time of the substances. Cone-shaped flame is very obviously to tell the length of time used to burn. Thus, it is more accurate to judge the flammability of substances and it can also accurately estimate the time of the flammability than Glow Wire Apparatus.

Consequently, it can be concluded that the main difference between Glow Wire Test Apparatus and Needle Flame Apparatus is that the former is only used for testing flammability of substances while the latter is used to test for both flammability and time of the flammability. The main advantage of Glow Wire Test Apparatus is that it is easily carried out and results can be obtained quickly. However, Needle Flame Apparatus is a more accurate method to test flammability and can detect both flammability and time of the flammability.

Combustibility test is an indispensable experiment in the production of substances, and hot wire test and needle flame test are important testing methods, which have their own advantages and disadvantages. Therefore, in order to use materials more cautiously and minimize the risk of fire as much as possible, the distinctions between them must be considered and the most suitable testing method must be chosen.

First of all, the glow wire flammability test is a general method of testing combustible raw materials, which can help producers to identify substances that can be formed by burning. The hot wire passes through the hands of two people, and effective heat conduction to generate temperature until the product is burned, indicating that the organic material has the flammability. Hot wire test usually tests a single item and can accurately reflect the combustibility of the test item. In addition, the test can save a lot of time in the experiment, which helps to save experiment cost.

However, there are some limitations in hot wire test, such as the need to use professional equipment for testing, and the price of the equipment is high. In addition, due to the different heat conductivity of different materials, it may also affect the accuracy of the test data.

On the other hand, the needle flame test is another common method of detecting combustibility, and its advantages lie therein. This test can test the combustibility of combustibles through sustained flame, and the testers can directly see that combustible materials will burn under the flame to achieve the purpose of identification. And its sensitivity is high, the smallest amount of flammability can also be detected. In terms of safety and reliability, it has advantages, because it does not need to use too much electrical equipment for testing, so no need to worry about safety risks in the operation process.

However, needle flame test also has some limitations, including the need for experimental personnel to have more technical training to operate the instrument, and the needle flame test results are not easy to get accurate and repeatable measurement, and needle flame test will produce harmful dust, which may endanger the health of test personnel.

In conclusion, today there are many effective methods of combustibility test, which can help producers to better identify the combustibility of combustibles. However, according to the specific requirements of the test, and the required combustibility characteristics, hot wire and needle flame are still two available test methods. Therefore, understanding the differences and advantages and disadvantages between them can guide producers to choose the most suitable combustibility test method, in order to use materials more cautiously and reduce the risk of fire as much as possible. Finally, before the test result is produced, producers should take the operation of combustibles seriously to ensure safety.

Hot wire and needle flame tests, defined as standard methods of combustibility testing, are both based on combustibility tests methods used in calorimetry tests. Both testing methods are used to measure the response of the sample to the temperature, but the actual testing work and equipment and materials used can vary greatly.

First, let’s look at the hot wire test, which is a calorimetry test method for testing the combustibility of a material. During the test, the material is roasted using a hot metal wire and a drop-dryer, and when the wire is heated, this thermal change can drive the decomposition of nearby materials and produce flames. Thus, this test method can help producers understand whether the material is prone to combustion and how prone it is to fire. The convenience of the hot wire test lies in the simple materials and methods used and the short time required. However, its determination of flame from decomposition of the material is based on user experience and can only judge roughly.

Secondly, let’s take a look at the needle flame test, which is also a calorimetry test method for combustibility. During the test, a batch of small-scale calorific liquid is used, which can easily be heated to 600 degrees. At this time, a blue flame can be ignited by the igniter, and after the test, the heat conduction degree of the sample can be predicted to determine its combustibility more accurately. The advantage is that an accurate test result is obtained, but the disadvantage is that the operation is more complicated and time consuming.

The above two testing methods have their advantages and disadvantages, and when the requirements of the work or the characteristics of the product change, which method to choose becomes a problem. Although they are both common methods of combustibility testing, when the job requirements are special or very important, the above mentioned methods may not be sufficient. Producers can also use more complex combustibility testing methods, such as material ionic burning curve, flammable gas detection and material energy density testing, in order to more accurately predict the combustibility characteristics of combustibles and better understand their combustibility.

The ZRS-3H Glow-wire Test Apparatus is according to IEC60695-2-1, IEC60695-2-10, IEC60695-2-11, IEC60695-2-12, IEC60695-2-13 (GB/T5169.10, GBT5169.11, GBT5169.12, GB/T5169.13) < Basic testing methods of Glow wire, basic testing methods of Glow wire device>, UL 746A, IEC829, DIN695 and VDE0471.

ZRS-3H Glow-wire Test Apparatus

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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