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

ABSTRACT
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.
SCOPE
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.

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Publication Date
31-Dec-2021
Current Stage
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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.
Designation: E947 −22
Standard Specification for
Sampling Single-Phase Geothermal Liquid or Steam for
1
Purposes of Chemical Analysis
This standard is issued under the fixed designation E947; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope geothermal liquid or steam. It does not cover specialized
equipmentrequiredfor,anduniqueto,aspecifictestormethod
1.1 This specification covers the basic requirements for
of analysis. The specification covers items such as valves,
equipment and the techniques to be used for the collection of
fittings, tubing, cooling coils and condensers, sample
uncontaminated and representative samples from single-phase
containers,andsampleprobes,butexcludesequipmentusedin
geothermal liquid or steam. Geopressured liquids are included.
specific testing and analysis.
1.2 The values stated in SI units are to be regarded as
3.2 The sampling procedure applies to sampling of single-
standard. The values given in parentheses after SI units are
phase steam or liquid streams, including single-phase steam or
provided for information only and are not considered standard.
liquid streams separated from two-phase flow as described in
1.3 This standard does not purport to address all of the
Practice E1675, dry saturated steam, superheated steam, and
safety concerns, if any, associated with its use. It is the
pumped geothermal liquid. The sampling procedure is not
responsibility of the user of this standard to establish appro-
applicable to the collection of liquid droplets and entrained
priate safety, health, and environmental practices and deter-
solids in steam (steam quality and purity), which must be
mine the applicability of regulatory limitations prior to use.
collected by isokinetic sampling utilizing different equipment
1.4 This international standard was developed in accor-
and techniques. The single-phase steam sampling specification
dance with internationally recognized principles on standard-
applies to vapor-phase species in the steam only (noncondens-
ization established in the Decision on Principles for the
able gases, HCl and boric acid). The single-phase liquid
Development of International Standards, Guides and Recom-
sampling specification applies to fully dissolved species in the
mendations issued by the World Trade Organization Technical
liquid only, including noncondensable gases if no gas bubbles
Barriers to Trade (TBT) Committee.
are present (gas breakout).
2. Referenced Documents
3.3 For most geothermal and geopressured fluids tested by
2
the procedures outlined in this specification, both liquid and
2.1 ASTM Standards:
steam samples may be collected.
D1192Guide for Equipment for Sampling Water and Steam
3
in Closed Conduits (Withdrawn 2003)
4. Sample Probes
E1675Practice for Sampling Two-Phase Geothermal Fluid
for Purposes of Chemical Analysis
4.1 Sampling probes shall be used to extract liquid or steam
from the main part of the geothermal flow rather than using a
3. Application
wall-accessing valve and pipe arrangement. This allows a
3.1 The equipment specification covers only that equipment
representative sample to be collected of a homogeneous,
which is commonly used for the sampling of single-phase single-phasefluid.Theprobesarenotdesignedformulti-phase
sampling or sampling under isokinetic conditions (see Fig. 1).
Consideration should be given to the force generated by any
1
This specification is under the jurisdiction ofASTM Committee E44 on Solar,
specific combination of probe diameter and system pressure
GeothermalandOtherAlternativeEnergySourcesandisthedirectresponsibilityof
andtothelimitationsandsafetyofslidingseals.Acombination
SubcommitteeE44.15onGeothermalFieldDevelopment,UtilizationandMaterials.
of probe tip bead and safety chain are recommended to restrict
Current edition approved Jan. 1, 2022. Published February 2022. Originally
approvedin1983.Lastspreviouseditionapprovedin2015asE947-83(2015).DOI: forcible ejection of the probe from the line being sampled. In
10.1520/E0947-22.
some cases, a permanently installed sampling probe is pre-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ferred.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
4.2 Sample probes shall be designed to extract representa-
the ASTM website.
3
tive samples from homogeneous single-phase fluid flow. Spe-
The last
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E947 − 83 (Reapproved 2015) E947 − 22
Standard Specification for
Sampling Single-Phase Geothermal Liquid or Steam for
1
Purposes of Chemical Analysis
This standard is issued under the fixed designation E947; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
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. See
Fig. 1.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
3
D1192 Guide for Equipment for Sampling Water and Steam in Closed Conduits (Withdrawn 2003)
E1675 Practice for Sampling Two-Phase Geothermal Fluid for Purposes of Chemical Analysis
3. Application
3.1 This The equipment specification covers only that equipment which is commonly used for the sampling of single-phase
geothermal liquid or steam. It does not cover specialized equipment required for, and unique to, a specific test or method of
analysis. The specification covers items such as valves, fittings, tubing, cooling coils and condensers, pumps, degassers, sample
containers, and sample probes, and packaging materials, but excludes equipment used in specific testing and analysis.
3.2 This The sampling procedure applies to sampling of single-phase steam or liquid streams prior streams, including single-phase
steam or liquid streams separated from two-phase flow as described in Practice E1675to separation and to separated single-phase
1
This specification is under the jurisdiction of ASTM Committee E44 on Solar, Geothermal and Other Alternative Energy Sources and is the direct responsibility of
Subcommittee E44.15 on Geothermal Field Development, Utilization and Materials.
Current edition approved March 1, 2015Jan. 1, 2022. Published April 2015February 2022. Originally approved in 1983. Lasts previous edition approved in 20072015 as
E947-83(2007).E947-83(2015). DOI: 10.1520/E0947-83R15.10.1520/E0947-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E947 − 22
steam or liquid streams., dry saturated steam, superheated steam, and pumped geothermal liquid. The sampling procedure is not
applicable to the collection of liquid droplets and entrained solids in steam (steam quality and purity), which must be collected by
isokinetic sampling utilizing different equipment and techniques. The single-phase steam sampling specification applies to
vapor-phase species in the steam only (noncondensable gases, HCl and boric acid). The single-phase liquid sampling specification
applies to fully dissolved species in the liquid only, including noncondensable gases if no gas bubbles are present (gas breakout).
3.3 For most geothermal and geopressured fluids tested by the procedures outlined in this specification, both liquid and gassteam
samples may be collected.
4. Sample Probes
4.1 SampleSampling 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. T
...

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