ASTM D5256-05(2009)
(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 standard. No other units of measurement are included in this 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.
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Designation: D5256 − 05(Reapproved 2009) An American National Standard
Standard Test Method for
Relative Efficacy of Dynamic Solvent Systems for
1
Dissolving Water-Formed Deposits
This standard is issued under the fixed designation D5256; 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 D3483 TestMethodsforAccumulatedDepositioninaSteam
Generator Tube
1.1 This test method covers the determination of the relative
efficacy of dynamic solvent systems for dissolving water-
3. Terminology
formed deposits that have been removed from the underlying
material or deposits attached to the underlying material.
3.1 Definitions:
3.1.1 water-formed deposits—any accumulation of in-
1.2 The nature of this test method is such that statements of
soluble material derived from water or formed by the reaction
precision and bias as determined by round robin tests could
of water upon the surface in contact with the water.
mislead users of this test method (see Sections 11 and 12).
Therefore, no precision and bias statements are made.
3.1.1.1 Discussion—Depositsformedfromorbywaterinall
its phases may be further classified as scale, sludge, corrosion
1.3 The values stated in SI units are to be regarded as
products, or biological deposits. The overall composition of a
standard. No other units of measurement are included in this
deposit or some part of a deposit may be determined by
standard.
chemical or spectrographic analysis; the constituents actually
1.4 This standard does not purport to address all of the
present as chemical substances may be identified by micro-
safety concerns, if any, associated with its use. It is the
scope or x-ray diffraction studies. Organisms may be identified
responsibility of the user of this standard to establish appro-
by microscopical or biological methods.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 3.1.2 For definitions of other terms used in this test method,
refer to Terminology D1129.
2. Referenced Documents
3.2 Definitions of Terms Specific to This Standard:
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2.1 ASTM Standards: 3.2.1 dynamic solvent system—any closed loop system in
which the solvent is in motion across the deposit surface.
D887 Practices for Sampling Water-Formed Deposits
D1129 Terminology Relating to Water
3.2.2 single and multiple solvent systems—a single solvent
D1193 Specification for Reagent Water
systemisaone-solutiontreatment.Amultiplesolventsystemis
D2331 Practices for Preparation and Preliminary Testing of
a treatment using two or more solutions in sequence.
Water-Formed Deposits
3.2.3 solvent system—specifiedchemicalsorcombinationof
D2777 Practice for Determination of Precision and Bias of
chemicals, that may include corrosion inhibitors, formulated to
Applicable Test Methods of Committee D19 on Water
react with and remove deposits.
D3263 Test Methods for Corrosivity of Solvent Systems for
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Removing Water-Formed Deposits (Withdrawn 2008)
4. Summary of Test Method
4.1 This test method consists of determining the ability of a
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This test method is under the jurisdiction of ASTM Committee D19 on Water
dynamic solvent system to dissolve deposits.
and is the direct responsibility of Subcommittee D19.03 on Sampling Water and
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
4.2 For the unattached deposits, this test method consists of
On-Line Water Analysis, and Surveillance of Water.
exposing weighed amounts of deposit to the dynamic solvent
Current edition approved May 1, 2009. Published June 2009. Originally
approved 1992. Last previous edition approved in 2005 as D5256 – 05. DOI: systems and determining the weight loss of the exposed
10.1520/D5256-05R09.
deposit, thereby determining the efficacy of the solvent system.
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
4.3 For the attached deposits, the amount and time required
Standards volume information, refer to the standard’s Document Summary page on
to yield a constant amount of certain loss of interest and the
the ASTM website.
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amount of deposit not removed determines the relative efficacy
The last approved version of this historical standard is referenced on
www.astm.org. of the dynamic solvent system.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D5256 − 05 (2009)
5. Significance and Use
5.1 This test method is useful because the choic
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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.
An American National Standard
Designation:D5256–00 Designation:D5256–05 (Reapproved 2009)
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 (´) indicates an editorial change since the last revision or reapproval.
1. 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.
1.3The values stated in SI units are to be regarded as the standard.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 887 Practices for Sampling Water-Formed Deposits
D 1129 Terminology Relating to Water
D 1193 Specification for Reagent Water
D 2331 Practices for Preparation and Preliminary Testing of Water-Formed Deposits
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D 2777 Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water
D2790Methods for Analysis of Solvent Systems Used for Removal of Water-Formed Deposits Practice for Determination of
Precision and Bias of Applicable Test Methods of Committee D19 on Water
D 3263 Test Methods for Corrosivity of Solvent Systems for Removing Water-Formed Deposits
2
D 3483 Test Methods for Accumulated Deposition in a Steam Generator Tube
2
D4743Test Methods for Efficacy of Solvent Systems for Dissolving Water-Formed Deposits Test Methods for Accumulated
Deposition in a Steam Generator Tube
3. Terminology
3.1 Definitions:
3.1.1 water-formed deposits—any accumulation of insoluble material derived from water or formed by the reaction of water
upon the surface in contact with the water. See 3.1.1.1.
3.1.1.1 Discussion—Deposits formed from or by water in all its phases may be further classified as scale, sludge, corrosion
products, or biological deposits. The overall composition of a deposit or some part of a deposit may be determined by chemical
or spectrographic analysis; the constituents actually present as chemical substances may be identified by microscope or x-ray
diffraction studies. Organisms may be identified by microscopical or biological methods.
3.1.2 For definitions of other terms used in this test method, refer to Terminology D 1129and Test Method D4743.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 dynamic solvent system—any closed loop system in which the solvent is in motion across the deposit surface.
3.2.2 single and multiple solvent systems—a single solvent system is a one-solution treatment. A multiple solvent system is a
treatment using two or more solutions in sequence.
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This test method is under the jurisdiction of ASTM Committee D-19 D19 on Water and is the direct responsibility of Subcommittee D19.03 on Sampling of Water and
Water-Formed Deposits, Surveillance of Water, and Flow Measurement of Water.
Current edition approved June 10, 2000. Published July 2000. Originally published as D 5256–92. Last previous edition D 5256–92 (1996)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 May 1, 2009. Published June 2009. Originally approved 1992. Last previous edition approved in 2005 as D 5256 – 05.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 11.02.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.
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