ASTM D3370-10

Standard Practices for Sampling Water from Closed Conduits

SIGNIFICANCE AND USE
The goal of sampling is to obtain for analysis a portion of the main body of water that is representative. The most critical factors necessary to achieve this are points of sampling, and materials selection, system design, time of sampling, frequency of sampling, and proper procedures to maintain the integrity of the sample prior to analysis.
Homogeneity of the process to be sampled is frequently lacking, necessitating multiple-point sampling. If it is impractical to utilize a most-representative sampling point, it may be practical to determine and understand interrelationships so that results obtained at a minimum number of points may be used to characterize the system.
Samples collected from a single point in a system are always recognized as being non-representative to some degree. For this reason, total representativeness of samples cannot be a prerequisite to the selection of a sampling point. The degree of representativeness of the sample shall be assessed and the assessment made a part of the permanent record. This will prevent an artificial degree of accuracy from being assigned to the data derived from tests on the sample.
The samples shall be of sufficient volume and shall be taken frequently enough to permit reproducibility of testing requisite for the desired objective, as required by the method of analysis to be used.  
Laboratories or facilities conducting water sampling should be in compliance with Guide D3856.
SCOPE
1.1 These practices cover the equipment and methods for sampling water from closed conduits such as process streams at power stations for chemical, physical, microbiological, and radiological analyses. It does not cover specialized equipment required for and unique to a specific test or method of analysis. The following are included:

General Information

• Status: Historical
• Publication Date: 30-Nov-2010
• ICS: 13.060.30 - Sewage water
• Technical Committee: D19 - Water
• Drafting Committee: D19.03 - Sampling Water and Water-Formed Deposits, Analysis of Water for Power Generation and Process Use, On-Line Water Analysis, and Surveillance of Water

Relations

• Replaces: ASTM D3370-08 - Standard Practices for Sampling Water from Closed Conduits
• Effective Date: 01-Dec-2010
• Referred By: ASTM D3867-16(2021)e1 - Standard Test Methods for Nitrite-Nitrate in Water
• Effective Date: 01-Dec-2010
• Referred By: ASTM D4839-03(2017) - Standard Test Method for Total Carbon and Organic Carbon in Water by Ultraviolet, or Persulfate Oxidation, or Both, and Infrared Detection
• Effective Date: 01-Dec-2010
• Referred By: ASTM D1252-06(2020) - Standard Test Methods for Chemical Oxygen Demand (Dichromate Oxygen Demand) of Water
• Effective Date: 01-Dec-2010
• Referred By: ASTM D7283-17 - Standard Test Method for Alpha and Beta Activity in Water By Liquid Scintillation Counting
• Effective Date: 01-Dec-2010
• Referred By: ASTM D5411-21 - Standard Practice for Calculation of Average Energy Per Disintegration (<acb><base vertadj="0">E</base><ac>–</ac></acb>) for a Mixture of Radionuclides in Reactor Coolant
• Effective Date: 01-Dec-2010
• Referred By: ASTM D4793-09(2017) - Standard Test Method for Sequential Batch Extraction of Waste with Water
• Effective Date: 01-Dec-2010
• Referred By: ASTM D4458-15(2023) - Standard Test Method for Chloride Ions in Brackish Water, Seawater, and Brines
• Effective Date: 01-Dec-2010
• Referred By: ASTM C375-22 - Standard Classification of Water Used in Milling of Porcelain Enamel
• Effective Date: 01-Dec-2010
• Referred By: ASTM D932-20 - Standard Practice for Filamentous Iron Bacteria in Water and Water-Formed Deposits
• Effective Date: 01-Dec-2010
• Referred By: ASTM D1293-18 - Standard Test Methods for pH of Water
• Effective Date: 01-Dec-2010
• Referred By: ASTM D7939-15 - Standard Test Method for Rapid Radiochemical Determination of Americium-241 in Water
• Effective Date: 01-Dec-2010
• Referred By: ASTM D6530-19 - Standard Test Method for Total Active Biomass in Cooling Tower Waters (Kool Kount Assay; KKA)
• Effective Date: 01-Dec-2010
• Referred By: ASTM D1067-16 - Standard Test Methods for Acidity or Alkalinity of Water
• Effective Date: 01-Dec-2010
• Referred By: ASTM D6234-13(2020) - Standard Test Method for Shake Extraction of Mining Waste by the Synthetic Precipitation Leaching Procedure
• Effective Date: 01-Dec-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3370 − 10
Standard Practices for
1
Sampling Water from Closed Conduits
This standard is issued under the fixed designation D3370; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These practices cover the equipment and methods for
A106/A106M Specification for Seamless Carbon Steel Pipe
samplingwaterfromclosedconduitssuchasprocessstreamsat
for High-Temperature Service
power stations for chemical, physical, microbiological, and
A179/A179M Specification for Seamless Cold-Drawn Low-
radiological analyses. It does not cover specialized equipment
Carbon Steel Heat-Exchanger and Condenser Tubes
required for and unique to a specific test or method of analysis.
A269 Specification for Seamless and Welded Austenitic
The following are included:
Stainless Steel Tubing for General Service
Sections
A335/A335M Specification for Seamless Ferritic Alloy-
Practice A—Grab Samples 9–17
Practice B—Composite Samples 18–23 Steel Pipe for High-Temperature Service
Practice C—On-Line Sampling 24–29
D1066 Practice for Sampling Steam
D1129 Terminology Relating to Water
1.2 For information on specialized sampling equipment,
D1193 Specification for Reagent Water
tests or methods of analysis, reference should be made to
D3648 Practices for the Measurement of Radioactivity
Volumes 11.01 and 11.02 of the Annual Book of ASTM
D3694 Practices for Preparation of Sample Containers and
Standards, relating to water.
for Preservation of Organic Constituents
1.3 The values stated in SI units are to be regarded as
D3856 Guide for Management Systems in Laboratories
standard. The values listed in parenthesis are for information
Engaged in Analysis of Water
only.
D4453 Practice for Handling of High Purity Water Samples
D4840 Guide for Sample Chain-of-Custody Procedures
1.4 This standard does not purport to address all of the
D4841 Practice for Estimation of Holding Time for Water
safety concerns, if any, associated with its use. It is the
Samples Containing Organic and Inorganic Constituents
responsibility of the user of this standard to establish appro-
D5540 Practice for Flow Control and Temperature Control
priate safety, health, and environmental practices and deter-
for On-Line Water Sampling and Analysis
mine the applicability of regulatory limitations prior to use.
For specific hazards statements, see 8.3 and 13.4.
3. Terminology
1.5 This international standard was developed in accor-
3.1 Definitions—For definitions used in these practices,
dance with internationally recognized principles on standard-
refer to Terminology D1129.
ization established in the Decision on Principles for the
3.2 Definitions of Terms Specific to This Standard:
Development of International Standards, Guides and Recom-
3.2.1 back-pressure regulator, n—a device designed to
mendations issued by the World Trade Organization Technical
maintain a constant pressure upstream of itself (variable or
Barriers to Trade (TBT) Committee.
fixed back pressure regulators are available) to maintain
constant flow in analyzers in on-line sampling.
3.2.1.1 Discussion—Contemporary designs of back-
1
These practices are under the jurisdiction of ASTM Committee D19 on Water
pressure regulators provide excellent sensitivity to pressure
and are the direct responsibility of Subcommittee D19.03 on Sampling Water and
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
2
On-Line Water Analysis, and Surveillance of Water For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2010. Published December 2010. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1974. Last previous edition approved in 2009 as D3370 – 09. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D3370-10. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D3370 − 10
vaiations. They require less space, have fewer maintenance results obtained at a minimum number of points may be used
problems, and reduce sample-contamination potential. to characterize the system.
3.2.2 composite sample, n—a series of grab samples inte-
5.3 Samples collected from a single point in a system are
grated into a single sample or a sample collected at specific
always recognized as being non-representative
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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:D3370–08 Designation:D3370–10
Standard Practices for
1
Sampling Water from Closed Conduits
This standard is issued under the fixed designation D3370; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 Thesepracticescovertheequipmentandmethodsforsamplingwaterfromclosedconduitssuchasprocessstreamsatpower
stations for chemical, physical, microbiological, and radiological analyses. It does not cover specialized equipment required for
and unique to a specific test or method of analysis. The following are included:
Sections
Practice A—Grab Samples 9to17
Practice B—Composite Samples 18 to 23
Practice C—Continual Sampling 24 to 29
Practice C—On-Line Sampling 24 to 29
1.2 For information on specialized sampling equipment, tests or methods of analysis, reference should be made to volumes
11.01 and 11.02 of the Annual Book of ASTM Standards, relating to water.
1.3
1.3 The values stated in SI units are to be regarded as standard. The values listed in parenthesis are for information only.
1.4 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 hazards statements, see 8.3 and 13.4.
2. Referenced Documents
2
2.1 ASTM Standards:
A106/A106M Specification for Seamless Carbon Steel Pipe for High-Temperature Service
A179/A179M Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes
A269 Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
A335/A335M Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
D1066 Practice for Sampling Steam
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D3648 Practices for the Measurement of Radioactivity
D3694 Practices for Preparation of Sample Containers and for Preservation of Organic Constituents
D3856 Guide for Good Laboratory Practices in Laboratories Engaged in Sampling and Analysis of Water
D4453 Practice for Handling of Ultra-Pure Water Samples
D4840 Guide for Sample Chain-of-Custody Procedures
D4841 Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents
D5540 Practice for Flow Control and Temperature Control for On-Line Water Sampling and Analysis
3. Terminology
3.1 Definitions—For definitions used in these practices, refer to Terminology D1129.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 back pressure regulator—a device designed to maintain a constant pressure upstream of itself (variable or fixed back
pressure regulators are available) to maintain constant flow in analyzers in continual sampling. back-pressure regulator, n—a
1
These practices are under the jurisdiction of ASTM Committee D19 on Water and are the direct responsibility of Subcommittee D19.03 on Sampling Water and
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use, On-Line Water Analysis, and Surveillance of Water
Current edition approved Oct.Dec. 1, 2008.2010. Published October 2008.December 2010. Originally approved in 1974. Last previous edition approved in 20072009 as
D3370 – 079. DOI: 10.1520/D3370-108.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D3370–10
device designed to maintain a constant pressure upstream of itself (variable or fixed back pressure regulators are available) to
maintain constant flow in analyzers in on-line sampling.
3.2.1.1 Discussion—Contemporary designs of back-pressure regulators provide excellent sensitivity to pressure vaiations.They
require less space, have fewer maintenance problems, and reduce sample-contamination potential.
3.2.2 composite sample, n—a series of grab samples integrated into a single
...