Autogenous Ignition Temperature (AIT) of Nonmetals

This test method provides the determination of the temperature at which liquids and solids will spontaneously ignite when heated in an oxygen-enriched environment without the application of a spark, flame, or other positive ignition mechanism. Non-metallic test samples typically weighing 200 mg are exposed to 10 MPa (1500 psig) Gaseous Oxygen and are heated at a rate of 5° C per minute until ignition is observed. As the temperature increases during the test, the pressure also increases. Most standards do not require pressure control during the test however; WHA can provide this test feature, if necessary. The AIT of the material is taken as the temperature in the test chamber, which is measured within one inch of the test sample, just prior to the rapid temperature rise associated with ignition.

The autogenous ignition temperature of a nonmetal allows WHA engineers to better understand the material's flammability and allow the material to be ranked with respect to oxygen compatibility. The AIT test setup is shown below. The nonmetal test sample is positioned in the test tube assembly located in the test chamber.

Fast Turn-around

Most of our standard testing can be performed in 2-3 weeks and we also offer expedited testing services, if required.

List of Standards