Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position

Importancia y uso:

5.1 Tests made on a material under conditions herein prescribed are of value in comparing the rate of burning or extent and time of burning characteristics, or both, of different materials, in controlling manufacturing processes, or as a measure of deterioration or change in these burning characteristics prior to or during use. Correlation with flammability under actual use conditions is not implied.

5.2 The rate of burning and other burning phenomena will be affected by such factors as density, pigments, any anisotropy of the material and the thickness of the specimen. Test data shall be compared only for specimens of similar thickness, whether comparisons are being made with the same or different materials. The rate of burning and other burning phenomena will vary with thickness.

5.3 It is feasible that sheet materials that have been stretched during processing will relax during burning and give erratic results unless they are first heated above their deflection temperature, in accordance with Test Method D648, for a time sufficient to permit complete relaxation.

5.4 Burning tests require that certain variables be arbitrarily fixed, for example, specimen size, energy source and application time, and end points. Materials will be found that are unusually sensitive to one or more of the conditions chosen for this method leading to highly variable results. Additional burning characterization by other methods is highly desirable in such cases (see Note 2).

5.5 In this procedure, the specimens are subjected to specific laboratory test conditions. If different test conditions are substituted or the end-use conditions are changed, it will not always be possible by or from this test to predict changes in the fire-test-response characteristics measured. Therefore, the results are valid only for the fire-test-exposure conditions described in this procedure.

Subcomité:

D20.30

Referida por:

D3801-20A, C1349-17R24, D1562-22, D4020-18, D4020-18, D7793-24, D5025-20A, D7745-19, F0964-13R24, D4477-24, D3679-24, D0707-15R23, D2287-19, D4396-22, D4804-23, D6576-20, D7445-24, D4216-22, D4000-23, E3020-22, D1593-22, D0706-20, F3214-23, C1822-21, D3841-21, F3214-23, D1784-20, E2634-18R22, F1837M-97R23, F3459-21, D4976-12AR20, D3801-20A, D3801-20A

Volúmen:

08.01

Número ICS:

13.220.40 (Ignitability and burning behaviour of materials and products), 83.080.01 (Plastics in general)

Palabras clave:

burning characteristics; combustion; extent of burning; flammability; HB; horizontal burning rate; plastics; rate of burning; small-scale burning test burning; time of burning;