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ASTM International - ASTM D1988-06

Standard Test Method for Mercaptans in Natural Gas Using Length-of-Stain Detector Tubes

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Organization: ASTM International
Publication Date: 1 June 2006
Status: inactive
Page Count: 4
ICS Code (Natural gas): 75.060
significance And Use:

The measurement of mercaptans in natural gas is important, because mercaptans are often added as odorants to natural gas to provide a warning property. The odor provided by the mercaptan serves to... View More

scope:

1.1 This test method covers a rapid and simple field determination of mercaptans in natural gas pipelines. Available detector tubes provide a total measuring range of 0.5 to 160 ppm by volume of mercaptans, although the majority of applications will be on the lower end of this range (that is, under 20 ppm). Besides total mercaptans, detector tubes are also available for methyl mercaptan (0.5 to 100 ppm), ethyl mercaptan (0.5 to 120 ppm), and butyl mercaptan (0.5 to 30 mg/M³ or 0.1 to 8 ppm).

Note 1-Certain detector tubes are calibrated in terms of milligrams per cubic metre (mg/M³) instead of parts per million by volume. The conversion is as follows for 25°C (77°F) and 760 mm Hg.

Equation 1 - mg/M³ = ppm X molecular weight/24.45

1.2 Detector tubes are usually subject to interferences from gases and vapors other than the target substance. Such interferences may vary among brands because of the use of different detection principles. Many detector tubes will have a precleanse layer designed to remove interferences up to some maximum level. Consult manufacturer's instructions for specific interference information. Hydrogen sulfide and other mercaptans are usually interferences on mercaptan detector tubes. See Section 5 for interferences of various methods of detection.

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. For specific hazard statements, see 7.3.

Document History

December 15, 2020
Standard Test Method for Mercaptans in Natural Gas Using Length-of-Stain Detector Tubes
1.1 This test method covers a rapid and simple field determination of mercaptans in natural gas pipelines. Available detector tubes provide a total measuring range of 0.5 to 160 ppm by volume of...
November 1, 2015
Standard Test Method for Mercaptans in Natural Gas Using Length-of-Stain Detector Tubes
1.1 This test method covers a rapid and simple field determination of mercaptans in natural gas pipelines. Available detector tubes provide a total measuring range of 0.5 to 160 ppm by volume of...
November 1, 2011
Standard Test Method for Mercaptans in Natural Gas Using Length-of-Stain Detector Tubes
1.1 This test method covers a rapid and simple field determination of mercaptans in natural gas pipelines. Available detector tubes provide a total measuring range of 0.5 to 160 ppm by volume of...
ASTM D1988-06
June 1, 2006
Standard Test Method for Mercaptans in Natural Gas Using Length-of-Stain Detector Tubes
1.1 This test method covers a rapid and simple field determination of mercaptans in natural gas pipelines. Available detector tubes provide a total measuring range of 0.5 to 160 ppm by volume of...
January 1, 2000
Standard Test Method for Mercaptans in Natural Gas Using Length-of-Stain Detector Tubes
1.1 This test method covers a rapid and simple field determination of mercaptans in natural gas pipelines. Available detector tubes provide a total measuring range of 0.5 to 160 ppm by volume of...
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