Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Test Procedure NOTE 8—Some materials exhibit a non-aming type of combustion for example, glowing combustion instead of, or at a lower oxygen concentration than that required for, aming combustion. Apply the flame for up to 30 s, removing it every 5 s, just briefly, to observe whether or not the entire top surface of the specimen is burning. A fume extraction system shall be provided with sufficient ventilation or exhaust to remove fumes or soot expelled from the chimney without disrupting the gas-ow rate or temperatures in the chimney. Inspection Validating the specifications, value and safety of your raw materials, products and assets.
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NOTE 5—It is helpful to place a wire screen above the noncombustible material to catch falling fragments and aid in keeping the base of the column clean.
ASTM International takes no position respecting the validity of any patent rights astm d2863 in connection with any item mentioned in this standard.
It is assumed that the amount of variation in thickness for such materials atsm be controlled by other standards. Test specimens of Atsm VI are suitable for film materials that can be rolled into a self-supporting specimen astm d2863 the procedure in 7. Install the next specimen.
A method is provided for testing flexible sheet or film materials while supported vertically. NOTE 14—Some materials exhibit a non-flaming type of combustion for example, glowing combustion instead of, or at a lower oxygen concentration than that required for, flaming combustion. Adequate safeguards for personnel and property shall be employed in conducting these tests. NOTE 6—Oxygen index results are likely to be signicantly affected by differences in burning awtm, due to material inhomogeneity for example, different levels of shrinkage when heated for specimens cut in different directions from asymmetrically-oriented thermoplastics lm.
Work Item s – proposed revisions of this standard.
Oxygen Index ASTM D2863
The maximum interval between recalibration shall be six months. The bottom of the chimney or the base ast which the tube is attached shall contain noncombustible material to mix and distribute evenly the gas mixture entering at astm d2863 base.
Therefore, the results d286 valid only for the fire-test-exposure conditions described in this procedure. Each laboratory obtained either 1 or 2 test results for each material. See Annex A1 for calibration method.
Link to Active This link will always route to the current Active version of the standard. Significance and Use 5.
ASTM D Standard Test Method for Measuring the Minimum Oxygen Concentration_Ecosafene
Denitions Specic to This Standard: A number in parentheses indicates the year of last reapproval. The procedure described in C SR is the between-laboratories or reproducibility astm d2863 deviation, calculated as the larger of either a the repeatability standard deviation or b the standard deviation of laboratory means.
The gas supply system shall incorporate a drying device, or provision for monitoring or sampling the gas supply for moisture content, unless the moisture content of the gas supplies is known to be acceptable. The top edge of the test sample is ignited, and the oxygen concentration in the flow is decreased until the flame is no longer supported.
It is obtained by pooling astm d2863 within-laboratory standard deviations of the test results from all of the participating laboratories: The fuel supply shall be adjusted so that the ame projects 16 6 4 mm vertically downwards from the outlet when the tube is vertical within the chimney and the ame is burning within the chimney atmosphere.
Alternatively, try to ignite a test specimen astm d2863 air, and note the burning behavior. It is the responsibility of the user of this standard to establish appropriate safety and asrm practices and determine the applicability of regulatory limitations prior to use.
Oxygen Index ASTM D
If the lm is very thin, it is possible that proper results will only be obtained if two or more layers are combined in the preparation of the roll to obtain proper results. Astm d2863 with burning characteristics under actual use conditions is not implied. NOTE 13—Where experience has shown that the requirements of Each laboratory obtained 2 test results for each material.
The principles of Awtm Annex A1 for calibration method. No other units of measurement are included in this standard. However, for materials astm d2863 unknown oxygen index, or which exhibit erratic burning characteristics, between 15 and 30 test specimens are likely to be required.