Specic hazards statement are given in Section Alternative Criteria Period of Burning Extent of BurningB After Ignition s 50 mm below the top of the specimen 50 mm below the upper reference mark 80 mm below the upper reference mark on the frame 6. Determine them from Table 3 as follows: Let the gas flow purge the chimney for at least 30 s prior to ignition of each specimen, and maintain the flow without change during ignition and combustion of each specimen.
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Designate the oxygen concentration used for the last specimen as CF. We need your help! Thank you for interesting in our services. Correlation with xstm characteristics under actual use conditions is not implied.
ASTM D - Free Download PDF
A method is provided for testing flexible sheet or film materials while supported vertically. In Procedure A, a complete assessment of the oxygen index is conducted using top surface ignition. However, for materials of unknown oxygen index, or which exhibit erratic burning characteristics, between 15 and 30 test specimens are likely to be required.
Please help us to share our service with your friends. 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. Please copy and paste this embed script to where you want to embed Embed Script. The maximum interval between recalibration shall be six months.
The principles of A3. The value and sign of k are dependent upon the pattern of the responses of specimens tested in accordance with A These criteria do not necessarily produce equivalent oxygen index results for specimens of differing shape or tested using different ignition conditions or procedures.
OI 5 CF 1 kd where: Send us a c2863 Wilton UK: The principles of repeatability and reproducibility would zstm be valid for such data.
NOTE 7—It is possible that the oxygen index samples of cellular materials that contain aztm ammable blowing agents that diffuse from the sample will change with time. This section may also include descriptions of the changes or reasons for the changes, or both.
D — 00 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics Oxygen Index 1 This standard is issued under the fixed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
It recommends test specimen conditioning and ambient conditions for the test apparatus.
The ame igniter shall comprise a tube, with an inside diameter of 2 6 1 mm, that can be inserted into the chimney to apply the test ame. A number in parentheses indicates the year of last reapproval. Summary of Test Method 4.
Oxygen Index ASTM D2863
Need help or have a question? If burning ceases, but spontaneous re-ignition occurs within 1 s, continue the observation and measurements. A timing device shall be provided, which is capable of measuring periods up to 5 min with an accuracy of NOTE 14—The burning portion includes any burning drips that run down the surface of the specimen.
If the film 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. 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.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Specic hazards statement are given in Section A method is provided for testing flexible asym or film materials while supported vertically.
It is the responsibility of the user of this standard to establish appropriate safety asmt health practices and determine the applicability of regulatory limitations prior to use.
NOTE 4—For tubes of 75 to mm diameter, a cap converging to an outlet of 40 mm diameter at a level at least 10 mm above the top of the cylindrical chimney has been found satisfactory for restricting the column opening. A superscript epsilon e indicates an editorial change since the last revision or reapproval.