ASTM C871-08ae2
(Test Method)Standard Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions
Standard Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions
SIGNIFICANCE AND USE
Research has demonstrated that in addition to the halide ion chloride; fluoride ions, when deposited and concentrated on the surface of austenitic stainless steel, can contribute to external stress corrosion cracking (ESCC) in the absence of inhibiting ions. Two widely used insulation specifications that are specific to ESCC allow the use of the same Test Methods C692 and C871 for evaluation of insulation materials. Both specifications require fluoride ions to be included with chloride ions when evaluating the extractable ions.
Chlorides (and fluorides) can be constituents of the insulating material or of the environment, or both. Moisture in the insulation or from the environment can cause chlorides (and fluorides) to migrate through the insulation and concentrate at the hot stainless steel surface.
The presence of sodium and silicate ions in the insulation has been found to inhibit external stress corrosion cracking caused by chloride (and fluoride) ions, whether such ions come from the insulation itself or from external sources. Furthermore, if the ratio of sodium and silicate ions to chloride (and fluoride) ions is in a certain proportion in the insulation, external stress corrosion cracking as a result of the presence of chloride (and fluoride) in the insulation will be prevented or at least mitigated (see also Specification C795).
SCOPE
1.1 These test methods cover laboratory procedures for the determination of water-leachable chloride, fluoride, silicate, and sodium ions in thermal insulation materials in the parts per million range.
1.2 Selection of one of the test methods listed for each of the ionic determinations required shall be made on the basis of laboratory capability and availability of the required equipment and appropriateness to the concentration of the ion in the extraction solution.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI 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.
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Standards Content (Sample)
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Designation:C871–08a
Standard Test Methods for
Chemical Analysis of Thermal Insulation Materials for
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Leachable Chloride, Fluoride, Silicate, and Sodium Ions
This standard is issued under the fixed designation C871; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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´ NOTE—Footnote 10 was editorially corrected in February 2011.
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´ NOTE—Footnote 1 was editorially corrected in March 2011.
1. Scope Insulation Materials for Leachable Chloride, Fluoride,
Silicate, and Sodium Ions
1.1 These test methods cover laboratory procedures for the
D1428 TestMethodforSodiumandPotassiuminWaterand
determination of water-leachable chloride, fluoride, silicate,
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Water-Formed Deposits by Flame Photometry
andsodiumionsinthermalinsulationmaterialsinthepartsper
2.2 AWWA Standards:
million range.
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4500-Si D Molybdosilicate Method for Silica
1.2 Selectionofoneofthetestmethodslistedforeachofthe
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4500-Si E Heteropoly Blue Method for Silica
ionic determinations required shall be made on the basis of
laboratorycapabilityandavailabilityoftherequiredequipment
3. Terminology
and appropriateness to the concentration of the ion in the
3.1 Definitions—Refer to Terminology C168 for definitions
extraction solution.
relating to insulation.
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
4. Summary of Test Methods
conversions to SI units that are provided for information only
4.1 Insulation specimens are leached for 30 min in boiling
and are not considered standard.
water. Tests to determine quantitatively chloride, fluoride,
1.4 This standard does not purport to address all of the
silicate, and sodium ions are performed on aliquots of the
safety concerns, if any, associated with its use. It is the
filtered leachate solution.
responsibility of the user of this standard to establish appro-
4.2 Analysis for Chloride:
priate safety and health practices and determine the applica-
4.2.1 Amperometric-coulometric titration test method.
bility of regulatory limitations prior to use.
4.2.2 Titrimetric test method. This method is no longer
recommended as requested byASTM International due to use
2. Referenced Documents
2 of a specific hazardous substance.
2.1 ASTM Standards:
4.2.3 Specific ion electrode test method.
C168 Terminology Relating to Thermal Insulation
4.3 Analysis for Fluoride:
C692 Test Method for Evaluating the Influence of Thermal
4.3.1 Specific ion electrode test method.
Insulations on External Stress Corrosion Cracking Ten-
4.3.2 SPADNS colorimetric test method.
dency of Austenitic Stainless Steel
4.4 Analysis for Silicate:
C795 Specification for Thermal Insulation for Use in Con-
4.4.1 Atomic absorption spectrophotometry test method.
tact with Austenitic Stainless Steel
4.4.2 Colorimetric test methods—AWWAMethods4500-Si
C871 Test Methods for Chemical Analysis of Thermal
D and 4500-Si E.
4.5 Analysis for Sodium:
4.5.1 Flame photometric test method
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These test methods are under the jurisdiction of ASTM Committee C16 on
Test Methods D1428.
Thermal Insulation and are the direct responsibility of Subcommittee C16.31 on
Chemical and Physical Properties. 4.5.2 Atomic absorption spectrophotometry test method.
Current edition approved Dec. 1, 2008. Published January 2009. Originally
approved in 1977. Last previous edition approved in 2008 as C871–08. DOI:
10.1520/C0871-08AE02.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Withdrawn. The last approved version of this historical standard is referenced
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM on www.astm.org.
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Standards volume information, refer to the standard’s Document Summary page on Standard Methods for the Examination of Water and Wastewater, 17th
the ASTM website. Edition, American Public Health Association, Washington, DC, 1989.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C871–08a
4.5.3 Sodium Ion-Selective electrode. clean, halide-free environment. Store clean gloves in a closed
container or envelope.
5. Significance and Use 7.2 It is suitable to handle materials with more than 25 ppm
chloride with clean, dry hands with no significant contamina-
5.1 Research has demonstrated that in addition to the halide
tion.
ionchloride;fluorideions,whendepositedandconcentratedon
the surface of austenitic stainless steel, can contribute to
8. Test Specimen
external stress corrosion cracking (ESCC) in the absence of
5 8.1 Apparatus an
...
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