ASTM D3370-08

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 D 3856.
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:
  Sections  Practice A—Grab Samples 9 to 17  Practice B—Composite Samples18 to 23  Practice C—Continual Sampling24 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 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.

General Information

• Status: Historical
• Publication Date: 30-Sep-2008
• 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 D3370-07 - Standard Practices for Sampling Water from Closed Conduits
• Effective Date: 01-Oct-2008
• Replaced By: ASTM D3370-10 - Standard Practices for Sampling Water from Closed Conduits
• Effective Date: 01-Dec-2010
• Referred By: ASTM D6071-14(2022) - Standard Test Method for Low Level Sodium in High Purity Water by Graphite Furnace Atomic Absorption Spectroscopy
• Effective Date: 01-Oct-2008
• Referred By: ASTM D5544-16 - Standard Test Method for On-Line Measurement of Residue After Evaporation of High-Purity Water
• Effective Date: 01-Oct-2008
• Referred By: ASTM D3864-12(2021) - Standard Guide for On-Line Monitoring Systems for Water Analysis
• Effective Date: 01-Oct-2008
• Referred By: ASTM D5174-23 - Standard Test Method for Trace Uranium in Water by Pulsed-Laser Phosphorimetry
• Effective Date: 01-Oct-2008
• Referred By: ASTM D4107-20 - Standard Test Method for Tritium in Drinking Water
• Effective Date: 01-Oct-2008
• Referred By: ASTM D7168-21 - Standard Test Method for ⁹⁹Tc in Water by Solid Phase Extraction Disk
• Effective Date: 01-Oct-2008
• Referred By: ASTM D1971-16(2021)e1 - Standard Practices for Digestion of Water Samples for Determination of Metals by Flame Atomic Absorption, Graphite Furnace Atomic Absorption, Plasma Emission Spectroscopy, or Plasma Mass Spectrometry
• Effective Date: 01-Oct-2008
• Referred By: ASTM D3867-16(2021)e1 - Standard Test Methods for Nitrite-Nitrate in Water
• Effective Date: 01-Oct-2008
• Referred By: ASTM D7784-20 - Standard Practice for the Rapid Assessment of Gamma-ray Emitting Radionuclides in Environmental Media by Gamma Spectrometry
• Effective Date: 01-Oct-2008
• Referred By: ASTM D512-23 - Standard Test Methods for Chloride Ion In Water
• Effective Date: 01-Oct-2008
• Referred By: ASTM D1252-06(2020) - Standard Test Methods for Chemical Oxygen Demand (Dichromate Oxygen Demand) of Water
• Effective Date: 01-Oct-2008
• Referred By: ASTM D2791-19 - Standard Test Method for On-Line Determination of Sodium in Water
• Effective Date: 01-Oct-2008
• Referred By: ASTM D6919-17 - Standard Test Method for Determination of Dissolved Alkali and Alkaline Earth Cations and Ammonium in Water and Wastewater by Ion Chromatography
• Effective Date: 01-Oct-2008

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:D3370–08
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 A335/A335M Specification for Seamless Ferritic Alloy-
Steel Pipe for High-Temperature Service
1.1 These practices cover the equipment and methods for
D1066 Practice for Sampling Steam
samplingwaterfromclosedconduitssuchasprocessstreamsat
D1129 Terminology Relating to Water
power stations for chemical, physical, microbiological, and
D1193 Specification for Reagent Water
radiological analyses. It does not cover specialized equipment
D3648 Practices for the Measurement of Radioactivity
required for and unique to a specific test or method of analysis.
D3694 Practices for Preparation of Sample Containers and
The following are included:
for Preservation of Organic Constituents
Sections
D3856 Guide for Good Laboratory Practices in Laborato-
Practice A—Grab Samples 9 to 17
Practice B—Composite Samples 18 to 23
ries Engaged in Sampling and Analysis of Water
Practice C—Continual Sampling 24 to 29
D4453 Practice for Handling of Ultra-Pure Water Samples
1.2 For information on specialized sampling equipment, D4840 Guide for Sample Chain-of-Custody Procedures
tests or methods of analysis, reference should be made to
D4841 Practice for Estimation of Holding Time for Water
volumes 11.01 and 11.02 of the Annual Book of ASTM Samples Containing Organic and Inorganic Constituents
Standards, relating to water.
D5540 Practice for Flow Control and Temperature Control
1.3 This standard does not purport to address all of the for On-Line Water Sampling and Analysis
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 3.1 Definitions—For definitions used in these practices,
bilityofregulatorylimitationspriortouse.Forspecifichazards
refer to Terminology D1129.
statements, see 8.3 and 13.4. 3.2 Definitions of Terms Specific to This Standard:
3.2.1 back pressure regulator—a device designed to main-
2. Referenced Documents
tain a constant pressure upstream of itself (variable or fixed
2
2.1 ASTM Standards: back pressure regulators are available) to maintain constant
A106/A106M Specification for Seamless Carbon Steel Pipe
flow in analyzers in continual sampling.
for High-Temperature Service 3.2.2 composite sample—a series of grab samples inte-
A179/A179M Specification for Seamless Cold-Drawn
grated into a single sample or a sample collected at specific
Low-Carbon Steel Heat-Exchanger and Condenser Tubes time intervals and integrated into a single sample. The goal of
A269 Specification for Seamless and Welded Austenitic
a composite sample is to characterize a process weighted
Stainless Steel Tubing for General Service average in proportion to process parameters.
3.2.3 grab sample—a single sample from a process stream
(flowing) or from a source of confined geometry (stagnant)
1
These practices are under the jurisdiction of ASTM Committee D19 on Water
withdrawn at a specific time. The goal of withdrawing a grab
and are the direct responsibility of Subcommittee D19.03 on Sampling Water and
sample is to obtain a small portion of the process stream or
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
On-Line Water Analysis, and Surveillance of Water
confined geometry source in order to characterize the entire
Current edition approved Oct. 1, 2008. Published October 2008. Originally
system.
approved in 1974. Last previous edition approved in 2007 as D3370 – 07. DOI:
10.1520/D3370-08.
NOTE 1—Contemporary designs of back pressure regulators provide
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
excellent sensitivity to pressure change and have eliminated the need for
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
head cups and the concurrent space and maintenance problems as well as
Standards volume information, refer to the standard’s Document Summary page on
sample contamination potential.
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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D3370–08
3.2.4 pressure reducer—a device designed to reduce pres- 5.5 Laboratories or facilities conducting water sampling
sure, and therefore control flow, of sample to a pre
...

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:D 3370–07 Designation:D3370–08
Standard Practices for
1
Sampling Water from Closed Conduits
This standard is issued under the fixed designation D 3370; 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
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 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:
A 106/A 106M Specification for Seamless Carbon Steel Pipe for High-Temperature Service
A 179/A 179M Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes
A 269 Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
A 335/A 335M Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
D 1066 Practice for Sampling Steam
D 1129 Terminology Relating to Water
D 1193 Specification for Reagent Water
D 3648 Practices for the Measurement of Radioactivity
D 3694 Practices for Preparation of Sample Containers and for Preservation of Organic Constituents
D 3856 Guide for Good Laboratory Practices in Laboratories Engaged in Sampling and Analysis of Water
D 4453 Practice for Handling of Ultra-Pure Water Samples
D 4840 Guide for Sample Chain-of-Custody Procedures
D 4841 Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents
D 5540 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 D 1129.
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.
3.2.2 composite sample—a series of grab samples integrated into a single sample or a sample collected at specific time intervals
and integrated into a single sample. The goal of a composite sample is to characterize a process weighted average in proportion
to process parameters.
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.Water
Current edition approved Dec.Oct. 1, 2007.2008. Published December 2007.October 2008. Originally approved in 1974. Last previous edition approved in 20032007 as
´1
D3370–95a (2003) .D 3370 – 07.
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 ----------------------
D3370–08
3.2.3 grab sample—a single sample from a process stream (flowing) or from a source of confined geometry (stagnant)
withdrawn at a specific time. The goal of withdrawing a grab sample is to obtain a small portion of the process stream or confined
geometry source in order to characterize the entire system.
3.2.4head cup—amethodoccasionallyusedtoachieveconstantpressure(see back
...