ASTM D 2843 EBOOK!
ASTM D Density of Smoke from the Burning or Decomposition of Plastics. This standard test method tests for the density of smoke produced by the. Tests made on a material under conditions herein prescribed are of considerable value in comparing the relative smoke obscuration characteristics of plastics. This test method serves to determine the extent to which plastic materials are likely to smoke under conditions of. ASTM D – Standard Test Method for Density of. Smoke from the Burning or Decomposition of Plastics. FTT ASTM D Exit Sign Test Apparatus.
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Correlation with other fire conditions is not implied. The measurements are made in terms of the loss of light transmission astm d 2843 a collected volume of smoke produced under controlled, standardized conditions.
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NOTE 6—If specimens other than the standard specimen are to be used, cooperating laboratories should agree upon preparation procedures and dimensions of the specimen.
The results in such cases may vary from the astm d 2843 obtained with the standard specimen.
- Density of Smoke from the Burning or Decomposition of Plastics
- ASTM D2843
The range change shall be accomplished by shunting the meter to one tenth of its sensitivity. When smoke astm d 2843 to absorb 90 percent of the light beam, a momentary switch shall be depressed returning the meter to its basic sensitivity.
Fire Testing Technology | Astm D Smoke Test
If the time intervals are audibly marked it will be convenient for the astm d 2843 to record his observations. A clutch shall be used to reset the clock at the start of a test. The block shall be coupled to the burner-positioning device and it shall start when the burner is swung into test position.
Thicknesses other than 6. Material thinner than 6. Material thicker than 6. Warning—Do not fail to light the burner immediately.
Include the time it takes for the sample to burst into ame, the time for ame extinguishment astm d 2843 specimen consumption, the obscuration of the exit sign by smoke accumulation, and any general or unusual burning characteristics noted such as melting, dripping, foaming, or charring.
Warning—It should be noted that for some materials the products of burning may be toxic, and care should be taken to guard the operator from the effects of these gases. The ventilating fan in the hood should be turned on and the damper opened immediately after the test is completed before opening the hood door in order to remove any irritating products of the test.
The exhaust fan is turned off and the hood damper closed during the test to prevent back draft. Burn off any material remaining on the screen or replace astm d 2843 screen and asbestos square for the next test. This tray has a slight taper to permit the drippings to collect at the bottom.
astm d 2843 See item 11 of Fig. The auxiliary burner shall be operated at kPa 20 psi and it shall be positioned in such a manner that its ame is directed at the center of the collector tray.
Treatment of Data Plot the average light absorption against time on linear paper.
The smoke density rating represents the total amount of smoke present in the chamber for the 4-min time interval. Classification using data from reaction to astm d 2843 tests NF P 92 — Safety against fire — Building materials — Reaction to fire tests — Radiation test used for rigid materials.
The horizontal light absorption was measured across the light beam path of astm d 2843 photoelectric cell, and the condition of the smoke chamber was observed. ASTM D Smoke Density Test is intended to be used for measuring the smoke-producing characteristics of plastics under controlled conditions of combustion or decomposition.