Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Self-Supporting Plastics in a Horizontal Position
|Publication Date:||1 July 1977|
This method covers a small-scale laboratory screening procedure for comparing the relative rate of burning and/or extent and time of burning of self-supporting plastics in the form of bars, molded or cut from sheets, plates, or panels, tested in the horizontal position. This method should be used to establish relative burning characteristics of plastic materials and should not be used as a fire hazard test method.
Caution - During the course of combustion, gases or vapors, or both, are evolved which may be hazardous to personnel. Adequate precautions should be taken to protect the operator.
NOTE 1-For this method, Self-Supporting Plastics are defined as those plastics which, when mounted with the clamped end of the specimen 10 mm above the horizontal screen, do not sag initially so that the free end of the specimen touches the screen.
NOTE 2-Additional information on materials which do not burn to the gage mark by this test may be obtained using Method D 757. Test for Incandescence Resistance of Rigid Plastics.2 For tests of flexible plastics in the form of thin sheets and film, reference should be made to Method D 568. Test for Rate of Burning and/or Extent and Time of Burning of Flexible Plastics in a Vertical Position.2 Tests on the burning rate of sheet and plate insulation are covered in Methods D 229. Testing Rigid Sheet and Plate Materials Used for Electrical Insulation.2 Burning characteristics, as measured by minimum oxygen to support combustion, may be determined by Method D 2863, for Measuring the Minimum Oxygen Concentration to Support Candle-like Combustion of Plastics (Oxygen Index).2
This standard should be used to measure and describe the properties of materials, products, or systems in response to heat and flame under controlled laboratory conditions and should not be used for the description or appraisal of the fire hazard of materials, products, or systems under actual fire conditions.3
NOTE 3 - The values stated in 51 units are to be regarded as the standard.
2 Annual Book of ASTM Standards, Part 35.
3 This caveat has been placed in the standard in accordance with a policy established by the ASTM Board of Directors in September 1973. The caveat will remain in this standard until Committee E-39 on Fire Hazard Standards has approved it as a fire hazard standard.