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Description of ASTM-D4891 2013ASTM D4891 - 13Standard Test Method for Heating Value of Gases in Natural Gas and Flare Gases Range by Stoichiometric CombustionActive Standard ASTM D4891 | Developed by Subcommittee: D03.03 Book of Standards Volume: 05.06 ASTM D4891Significance and Use
5.1 This test method provides an accurate and reliable procedure to measure the total heating value of a fuel gas, on a continuous basis, which is used for regulatory compliance, custody transfer, and process control. 5.2 Some instruments which conform to the requirements set forth in this test method can have response times on the order of 1 min or less and can be used for on-line measurement and control. 5.3 The method is sensitive to the presence of oxygen and nonparaffin fuels. For components not listed and composition ranges that fall outside those in Table 1 and Table 2 , modifications in the method and changes to the calibration gas or gasses being used may be required to obtain correct results. 1. Scope
1.1 This test method covers the determination of the heating value of natural gases and similar gaseous mixtures within the range of composition shown in Table 1 , and Table 2 that covers flare components but is not intended to limit the components to be measured in flare gases. TABLE 1 Natural Gas Components and Range of Composition Covered
TABLE 2 Natural Gas Components and Range of Composition Covered A
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