One example of a design is shown in Fig. It is inappropriate to apply the test results and precision in Table 4 to acceptance or rejection of materials, as these data apply only to the materials tested in the round robin and are unlikely to be rigorously representative of other lots, formulations, conditions, materials, or laboratories. This section may also include descriptions of the changes or reasons for the changes, or both. If the condition is satisfied, calculate the oxygen index in accordance with 9. Formally confirming that your products and services meet all trusted external and internal standards.
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In Procedure A, a complete assessment of the oxygen index is conducted using top surface ignition. This standard is subject to astm d2863 at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.
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Oxygen Index ASTM D2863
Let the gas ow purge the chimney for at astm d2863 30 s prior to ignition of each specimen, and maintain the ow without change during ignition and combustion of each specimen. Specic hazards statement are given in Section For example, for mixtures made using air mixed with oxygen of 10 D — 00 A3.
Alternatively, try to ignite a test specimen in air, and note astm d2863 burning behavior. The maximum interval between recalibration shall be six months. Correlation with burning characteristics under actual use conditions is not implied. Significance and Use 5. It is calculated as the square root of the ratio of a the sum of the squares of the individual standard deviations and b the number of laboratories. During the course of combustion, gases or vapors, or both, are evolved which may be hazardous to personnel.
The fuel supply shall be adjusted so that the flame projects 16 6 4 mm vertically downwards from the outlet when the tube is vertical within the chimney and the flame is burning within the chimney atmosphere.
Correlation with burning characteristics under actual use conditions is not implied. Install the next specimen. It includes the following: The chimney shall be mounted securely on the base to prevent air leaks. If the following condition is satised: Designate astm d2863 oxygen concentration used for the last specimen as CF.
Oxygen Index ASTM D
In case of conict, the denitions given in Terminology E shall prevail. Alternative Criteria Period astm d2863 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. Dimensions in the table are of the specimen size from which the rolled form is made. It is obtained by pooling the within-laboratory standard deviations of the test results from all of the participating laboratories: Thank you for interesting in our services.
The results from these laboratories could not be incorporated into this precision statement, due to the limited number of participants to comply with Practice E guidelines. The actual specimen holder shall astm d2863 the one in 6.
Calibration of Apparatus 9. Standards can be obtained from appropriate standard authorities. Procedure C provides a comparison with a specied minimum value of oxygen index and can be conducted using top surface ignition or propagating ignition. For example, for mixtures made using air mixed with oxygen of where: Astm d2863 test chimney consists of a heatresistant glass tube of 75 to mm inside diameter and to mm height.
During the course of combustion, gases or vapors, or both, are evolved which may be hazardous to personnel. Signicance and Use 5. Astm d2863 has 2d863 been described in the scope, the summary of test method. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. NOTE 9—For tests on materials that exhibit steady burning and spread of combustion in oxygen concentrations at, or close to, their oxygen index value, or for structurally self-supporting specimens of 3 mm thickness, Procedure B with specimens marked in accordance with 7.
Specific hazards statements astm d2863 given in Note 2.