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ASTM E947-22

Current Revision

Standard Specification for Sampling Single-Phase Geothermal Liquid or Steam for Purposes of Chemical Analysis

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1.1 This specification covers the basic requirements for equipment and the techniques to be used for the collection of uncontaminated and representative samples from single-phase geothermal liquid or steam. Geopressured liquids are included.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


This specification covers the basic requirements for equipment to be used for the collection of uncontaminated and representative samples from single-phase geothermal liquid or steam. Sample probes shall be used to extract liquid or steam from the main part of the geothermal flow rather than using a wall-accessing valve and pipe arrangement. Sampling lines shall be as short as practical and of sufficient strength to prevent structural failure. Valves which control access to the sampling point shall have straight throats. The tube through which the sample flows shall be continuous through the cooling location so there will be no possibility of sample contamination or dilution from the cooling water. Liquid sample containers and compatible closures shall not bias the sample components of interest. Devices used to collect and transport the gas component of the samples shall be resistant to chemical reactions and to gaseous diffusion or adsorption. Filters, when used, shall be housed in a pressure-tight container assuring that the full flow passes through the filter. The sampling apparatus shall be kept clean.


SDO ASTM: ASTM International
Document Number E947
Publication Date Jan. 1, 2022
Language en - English
Page Count 11
Revision Level 22
Supercedes
Committee E44.15
Publish Date Document Id Type View
Jan. 1, 2022 E0947-22 Revision
March 1, 2015 E0947-83R15 Reaffirmation
Nov. 1, 2007 E0947-83R07 Reaffirmation
May 27, 2002 E0947-83R02 Reaffirmation
May 27, 2002 E0947-83R96E01 Reaffirmation