Standard Test Method for Evaluation of Conductive and Compressive Heat Resistance (CCHR)

Importancia y uso:

5.1 This test method rates materials intended for use as protective clothing against exposure to hot surfaces for their thermal insulating properties and their reaction to the test conditions.

5.2 The thermal protection time, as determined by this test method, relates to the actual end-use performance only to the degree that the end-use exposure is identical to the exposure used in this test method; that is, the hot surface test temperature is the same as the actual end-use temperature and the test pressure is the same as the end-use pressure.

5.2.1 Higher pressures beyond the 3-kPa (0.5-psi) pressure provided by the calorimeter assembly in this test method shall be permitted to be used in this test method to simulate the conditions of protective clothing use.

5.3 The procedure maintains the specimen in a static, horizontal position under a standard pressure and does not involve movement.

5.4 One of the intended applications for this test method is comparing the relative performance of different materials.

5.5 This test method is limited to short exposure because the model used to predict burn injury is limited to predictions of time-to-burn for up to 30 s, and predictions of time-to-pain for up to 50 s. The use of this test method for longer hot surface exposures requires a different model for determining burn injury or a different basis for reporting test results.

Subcomité:

F23.80

Referida por:

F1494-23

Volúmen:

11.03

Número ICS:

13.340.10 (Protective clothing)

Palabras clave:

hot surface contact; protective clothing; textiles; thermal; thermal resistance ;