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ASTM D5256-05

(Test Method)

Standard Test Method for Relative Efficacy of Dynamic Solvent Systems for Dissolving Water-Formed Deposits

Standard Test Method for Relative Efficacy of Dynamic Solvent Systems for Dissolving Water-Formed Deposits

SIGNIFICANCE AND USE
This test method is useful because the choice of a solvent system for removing water-formed deposits depends upon the ability of the dynamic solvent system to dissolve both unattached and attached deposits.
SCOPE
1.1 This test method covers the determination of the relative efficacy of dynamic solvent systems for dissolving water-formed deposits that have been removed from the underlying material or deposits attached to the underlying material.
1.2 The nature of this test method is such that statements of precision and bias as determined by round robin tests could mislead users of this test method (see Sections 11 and 12). Therefore, no precision and bias statements are made.
1.3 The values stated in SI units are to be regarded as the standard.
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.

General Information

Status
Historical
Publication Date
31-May-2005
ICS
13.060.50 - Examination of water for chemical substances
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
Current Stage
Ref Project

Relations

Replaces
ASTM D5256-00 - Standard Test Method for Relative Efficacy of Dynamic Solvent Systems for Dissolving Water-Formed Deposits
Effective Date
01-Jun-2005
Replaced By
ASTM D5256-05(2009) - Standard Test Method for Relative Efficacy of Dynamic Solvent Systems for Dissolving Water-Formed Deposits
Effective Date
01-May-2009

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ASTM D5256-05 - Standard Test Method for Relative Efficacy of Dynamic Solvent Systems for Dissolving Water-Formed DepositsASTM D5256-05 - Standard Test Method for Relative Efficacy of Dynamic Solvent Systems for Dissolving Water-Formed Deposits
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ASTM D5256-05 - Standard Test Method for Relative Efficacy of Dynamic Solvent Systems for Dissolving Water-Formed Deposits
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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
An American National Standard
Designation:D5256–05
Standard Test Method for
Relative Efficacy of Dynamic Solvent Systems for
1
Dissolving Water-Formed Deposits
This standard is issued under the fixed designation D 5256; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 water-formed deposits—any accumulation of in-
soluble material derived from water or formed by the reaction
1.1 This test method covers the determination of the relative
ofwateruponthesurfaceincontactwiththewater.See3.1.1.1.
efficacy of dynamic solvent systems for dissolving water-
3.1.1.1 Discussion—Deposits formed from or by water in
formed deposits that have been removed from the underlying
all its phases may be further classified as scale, sludge,
material or deposits attached to the underlying material.
corrosion products, or biological deposits. The overall compo-
1.2 The nature of this test method is such that statements of
sition of a deposit or some part of a deposit may be determined
precision and bias as determined by round robin tests could
by chemical or spectrographic analysis; the constituents actu-
mislead users of this test method (see Sections 11 and 12).
ally present as chemical substances may be identified by
Therefore, no precision and bias statements are made.
microscope or x-ray diffraction studies. Organisms may be
1.3 The values stated in SI units are to be regarded as the
identified by microscopical or biological methods.
standard.
3.1.2 For definitions of other terms used in this test method,
1.4 This standard does not purport to address all of the
refer to Terminology D 1129.
safety concerns, if any, associated with its use. It is the
3.2 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
3.2.1 dynamic solvent system—any closed loop system in
priate safety and health practices and determine the applica-
which the solvent is in motion across the deposit surface.
bility of regulatory limitations prior to use.
3.2.2 single and multiple solvent systems—a single solvent
2. Referenced Documents systemisaone-solutiontreatment.Amultiplesolventsystemis
2
a treatment using two or more solutions in sequence.
2.1 ASTM Standards:
3.2.3 solvent system—specified chemicals or combination
D 887 Practice for Sampling Water-Formed Deposits
of chemicals, that may include corrosion inhibitors, formulated
D 1129 Terminology Relating to Water
to react with and remove deposits.
D 1193 Specification for Reagent Water
D 2331 Practices for Preparation and PreliminaryTesting of
4. Summary of Test Method
Water-Formed Deposits
4.1 This test method consists of determining the ability of a
D 2777 Practice for Determination of Precision and Bias of
dynamic solvent system to dissolve deposits.
Applicable Methods of Committee D19 on Water
4.2 For the unattached deposits, this test method consists of
D 3263 Test Methods for Corrosivity of Solvent Systems
exposing weighed amounts of deposit to the dynamic solvent
for Removing Water-Formed Deposits
systems and determining the weight loss of the exposed
D 3483 Test Methods for Accumulated Deposition in a
deposit, thereby determining the efficacy of the solvent system.
Steam Generator Tube
4.3 For the attached deposits, the amount and time required
3. Terminology to yield a constant amount of certain loss of interest and the
amount of deposit not removed determines the relative efficacy
3.1 Definitions:
of the dynamic solvent system.
1
5. Significance and Use
This test method is under the jurisdiction of ASTM Committee D19 on Water
and is the direct responsibility of Subcommittee D19.03 on Sampling Water and
5.1 This test method is useful because the choice of a
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
solvent system for removing water-formed deposits depends
On-Line Water Analysis, and Surveillance of Water.
upon the ability of the dynamic solvent system to dissolve both
Current edition approved June 1, 2005. Published June 2005. Originally
approved 1992. Last previous edition approved in 2000 as D 5256 – 00.
unattached and attached deposits.
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
6. Apparatus
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 6.1 Common Equipment:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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5.1 Chlorine is added to potable water, waste water, and industrial water for a variety of purposes. Some of these purposes are:  
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5.1 This test method has been developed by U.S. EPA Region 5 Chicago Regional Laboratory (CRL).  
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1.1 This test method covers the determination of hardness in water by titration with potentiometric detection via optical sensor. This test method is applicable to waters that are free of chemicals that will complex calcium or magnesium. The lower detection limit of this test method is approximately 2 mg/L to 5 mg/L as CaCO3; the upper limit can be extended to all concentrations by sample dilution. It is possible to differentiate between hardness due to calcium ions and that due to magnesium ions by this test method.  
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Standard Test Method for Determination of Select Pesticides in Water by Multiple Reaction Monitoring Liquid Chromatography Tandem Mass Spectrometry

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1.4 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 The Reporting Range for the target analytes are listed in Table 1.  
1.5.1 The reporting limit in this test method is the minimum value below which data are documented as non-detects. The reporting limit is calculated from the concentration of the Level 1 calibration standard as shown in Table 6 after taking into account an 8 mL water sample volume and a final diluted sample volume of 10 mL (80 % water/20 % methanol).  
1.6 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.  
1.7 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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