ASTM-D1945:2003 Edition

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D1945-03 Standard Test Method for Analysis of Natural Gas by Gas Chromatography

Published By	Publication Date	Number of Pages
ASTM	2003	17

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Category: ASTM

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Description

1.1 This test method covers the determination of the chemical composition of natural gases and similar gaseous mixtures within the range of composition shown in Table 1. This test method may be abbreviated for the analysis of lean natural gases containing negligible amounts of hexanes and higher hydrocarbons, or for the determination of one or more components, as required.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 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.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Summary of Test Method Significance and Use Apparatus TABLE 1
2	FIG. 1
3	FIG. 2 FIG. 3
4	FIG. 4 FIG. 5
5	Preparation of Apparatus FIG. 6 FIG. 7
6	FIG. 8
7	Reference Standards FIG. 9 TABLE 2 TABLE 3
8	Procedure TABLE 4
9	Calculation Precision
10	Keywords A1. SUPPLEMENTARY PROCEDURES A1.1 Analysis for Only Propane and Heavier Components A1.2 Single-Run Analysis for Ethane and Heavier Components A1.3 Special Analysis to Determine Hexanes and Heavier Components
11	A2. PREPARATION OF COLUMNS AND DRIER A2.1 A2.2 A2.3 A2.4 FIG. A1.1
12	X1. REFERENCE STANDARD MIXTURE X1.1 Preparation FIG. A2.1
13	X1.2 Calibration with Pure Components X1.3 Calibration using Relative Molar Response Values
14	TABLE X1.1 FIG. X1.1
15	X2. SAMPLE CALCULATIONS (SEE SECTION X3. PRECAUTIONS FOR AVOIDING COMMON CAUSES OF ERRORS X3.1 Hexane and Heavier Content Change TABLE X1.2 TABLE X2.1
16	X3.2 Acid Gas Content Change X3.3 Sample Dew Point X3.4 Sample Inlet System X3.5 Sample Size Repeatability X3.6 Reference Standard X3.7 Measurements X3.8 Miscellaneous