ASTM D5256-14

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

SIGNIFICANCE AND USE
5.1 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. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered 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: 14-Mar-2014
• 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

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D5256 − 14
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.
3
1. Scope Removing Water-Formed Deposits (Withdrawn 2008)
D3483 TestMethodsforAccumulatedDepositioninaSteam
1.1 Thistestmethodcoversthedeterminationoftherelative
Generator Tube
efficacy of dynamic solvent systems for dissolving water-
formed deposits that have been removed from the underlying
3. Terminology
material or deposits attached to the underlying material.
3.1 Definitions:
1.2 The nature of this test method is such that statements of
3.1.1 For definitions of other terms used in this test method,
precision and bias as determined by round robin tests could
refer to Terminology D1129.
mislead users of this test method (see Sections 11 and 12).
3.2 Definitions of Terms Specific to This Standard:
Therefore, no precision and bias statements are made.
3.2.1 dynamic solvent system, n—any closed loop system in
1.3 The values stated in SI units are to be regarded as
which the solvent is in motion across the deposit surface.
standard. The values given in parentheses are mathematical
3.2.2 single and multiple solvent systems, n—a single sol-
conversions to inch-pound units that are provided for informa-
vent system is a one-solution treatment. A multiple solvent
tion only and are not considered standard.
system is a treatment using two or more solutions in sequence.
1.4 This standard does not purport to address all of the
3.2.3 solvent system, n—specified chemicals or combination
safety concerns, if any, associated with its use. It is the
of chemicals, that may include corrosion inhibitors, formulated
responsibility of the user of this standard to establish appro-
to react with and remove deposits.
priate safety and health practices and determine the applica-
3.2.4 water-formed deposits, n—any accumulation of in-
bility of regulatory limitations prior to use.
soluble material derived from water or formed by the reaction
of water upon the surface in contact with the water.
2. Referenced Documents
3.2.4.1 Discussion—Depositsformedfromorbywaterinall
2
2.1 ASTM Standards:
its phases may be further classified as scale, sludge, corrosion
D887 Practices for Sampling Water-Formed Deposits
products, or biological deposits. The overall composition of a
D1129 Terminology Relating to Water
deposit or some part of a deposit may be determined by
D1193 Specification for Reagent Water
chemical or spectrographic analysis; the constituents actually
D2331 Practices for Preparation and Preliminary Testing of
present as chemical substances may be identified by micro-
Water-Formed Deposits
scope or x-ray diffraction studies. Organisms may be identified
D2777 Practice for Determination of Precision and Bias of
by microscopical or biological methods.
Applicable Test Methods of Committee D19 on Water
D3263 Test Methods for Corrosivity of Solvent Systems for
4. Summary of Test Method
4.1 This test method consists of determining the ability of a
dynamic solvent system to dissolve deposits.
4.2 For the unattached deposits, this test method consists of
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
exposing weighed amounts of deposit to the dynamic solvent
and is the direct responsibility of Subcommittee D19.03 on Sampling Water and
systems and determining the weight loss of the exposed
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
deposit, thereby determining the efficacy of the solvent system.
On-Line Water Analysis, and Surveillance of Water.
Current edition approved March 15, 2014. Published April 2014. Originally
4.3 For the attached deposits, the amount and time required
approved 1992. Last previous edition approved in 2009 as D5256 – 05 (2009). DOI:
to yield a constant amount of certain loss of interest and the
10.1520/D5256-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5256 − 14
A: High Point Pressure Relief, B: Pressure Gauge, C: Vent, D: Solvent Addition
Valve, E: Temperatu
...

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: D5256 − 05 (Reapproved 2009) D5256 − 14 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
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 The values
given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not
considered 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:
D887 Practices for Sampling Water-Formed Deposits
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2331 Practices for Preparation and Preliminary Testing of Water-Formed Deposits
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
3
D3263 Test Methods for Corrosivity of Solvent Systems for Removing Water-Formed Deposits (Withdrawn 2008)
D3483 Test Methods for Accumulated Deposition in a Steam Generator Tube
3. Terminology
3.1 Definitions:
3.1.1 For definitions of other terms used in this test method, refer to Terminology D1129.
3.2 Definitions:Definitions of Terms Specific to This Standard:
3.2.1 dynamic solvent system, n—any closed loop system in which the solvent is in motion across the deposit surface.
3.2.2 single and multiple solvent systems, n—a single solvent system is a one-solution treatment. A multiple solvent system is
a treatment using two or more solutions in sequence.
3.2.3 solvent system, n—specified chemicals or combination of chemicals, that may include corrosion inhibitors, formulated to
react with and remove deposits.
3.2.4 water-formed deposits—deposits, n—any accumulation of insoluble material derived from water or formed by the reaction
of water upon the surface in contact with the water.
1
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
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, 2009March 15, 2014. Published June 2009April 2014. Originally approved 1992. Last previous edition approved in 20052009 as
D5256 – 05.D5256 – 05 (2009). DOI: 10.1520/D5256-05R09.10.1520/D5256-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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.
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

---------------------- Page: 1 ----------------------
D5256 − 14
3.2.4.1 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 D1129.
3.2 Definitions of Terms Specific
...