Significance and Use
This test method will allow comparisons of the combustion characteristics of various metallic materials. The combustion characteristics that can be evaluated include (1) threshold pressure and (2) average regression rate (apparent burn rate) of the sample.
1. Scope
1.1 This test method covers a test apparatus and technique to determine the minimum test gas pressure that supports self-sustained combustion (the threshold pressure) and the average regression rate (apparent burn rate) of a standardized sample of a metallic material that has been ignited using a strong promoter.
1.2 The data obtained from this test method are dependent on the precise test sample configuration and provide a basis for comparing the combustion behavior of materials. No criteria are implied for relating these data to the suitability of a material's use in any actual system. The application of data obtained from this test method is discussed in Guides G 88 and G 94.
1.3 Requirements for an apparatus suitable for this test method are given, as well as an example of such an apparatus. The example, however, is not required to be used.
1.4 This test method is for gaseous oxygen or any mixture of oxygen with diluents that will support combustion, at any pressure within the capabilities of the apparatus.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific hazards statements are given in Section 9.
2. Referenced Documents
G88 Guide for Designing Systems for Oxygen Service
G93 Practice for Cleaning Methods for Material and Equipment Used in Oxygen-Enriched Environments
G94 Guide for Evaluating Metals for Oxygen Service
MIL-0-27210E Amendment 1-Oxygen, Aviator's Breathing, Liquid and Gas
BB-0-925 Oxygen, Technical, Gas and Liquid
Index Terms
combustion; high-pressure; igniter; metallic materials; metals ignition; oxygen-enriched; promoted combustion; promoted ignition; promoter; threshold pressure; ICS Number Code 77.040.30
DOI: 10.1520/G0124-95R03
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