4 ways to evaluate the flame retardant properties of cables:
1, a single cable does not delay the standard test method
A section of the test was suspended in a single cable dedicated burner, the role of the cable at the flame temperature reaches a certain value (more than the ignition temperature), a few minutes, remove the fire, and then observe whether the test cable self-extinguishing .
2, material oxygen index method
A certain number of dimensions of the test sample into a special container, filled with nitrogen, and gradually filled with oxygen at different oxygen content, ignition in the prescribed manner, so that the contents of the container when the sample combustion smooth oxygen content is called oxygen index.
3, the cable through the hole flame test standard test method
The United States, the Soviet Union, Japan, Japan, the use of cable plugging through the hole to do fire retardant material, have developed a standard test method, in a special furnace, according to the standard temperature curve gauge? "Time - temperature" change rate of temperature effect on the test cable at one end of the wall through the cable plugging treatment, after 1-3h heating, observe the outer cable section of the master non-combustible or intact, to identify the sealing material flame characteristic.
4, bundled cable flame resistance standard test method
And a single cable does not ignite the same basic principles of the standard test method. China's wire and cable plant has been built and modeled the new standard IEC382-2 IEEC-383, ICS-366 standard set of test equipment. And the simulation of cable tunnels, cable shafts, cable sandwich test, and get more reliable test data.
Powder Fertilizer Water Soluble
Powder Fertilizer Water Soluble
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