ASTM D933-84(2012)
(Practice)Standard Practice for Reporting Results of Examination and Analysis of Water-Formed Deposits
Standard Practice for Reporting Results of Examination and Analysis of Water-Formed Deposits
SIGNIFICANCE AND USE
The results are used to characterize the scale formed and used to evaluate the quality of water used in the unit. Characterizing the scale will assist in the design of the water treatment process to avoid further scale buildup. The use of modern up-to-date chemical detection units will increase the usefulness of the practice.
SCOPE
1.1 This practice covers the manner in which the results of examination and analysis for inorganic constituents of deposits formed from waters are to be reported.
1.2 While various practices of reporting the analysis of water-formed deposits are in use, this practice is intended as a rational and comprehensive practice for general application. For use in specific industries or individual cases, molecular combinations may be useful and desirable.
1.3 This standard does not purport to address 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
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Standards Content (Sample)
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Designation: D933 − 84 (Reapproved 2012)
Standard Practice for
Reporting Results of Examination and Analysis of Water-
Formed Deposits
This standard is issued under the fixed designation D933; 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 modern up-to-date chemical detection units will increase the
usefulness of the practice.
1.1 This practice covers the manner in which the results of
examination and analysis for inorganic constituents of deposits
5. History of Sample
formed from waters are to be reported.
5.1 Information regarding the source and history of the
1.2 While various practices of reporting the analysis of
sample shall be included in the report of the analysis. This
water-formed deposits are in use, this practice is intended as a
information should be that specified in Practices D887,as
rational and comprehensive practice for general application.
follows:
For use in specific industries or individual cases, molecular
5.1.1 Name of individual or company supplying sample,
combinations may be useful and desirable.
5.1.2 Geographic origin of sample,
1.3 This standard does not purport to address the safety
5.1.3 Date and time of sampling,
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and 5.1.4 Number of sample,
health practices and determine the applicability of regulatory 5.1.5 Name and other designation of equipment from which
limitations prior to use.
sample was removed,
5.1.6 Precise location from which sample was removed (for
2. Referenced Documents
example, exactly what turbine blade),
2.1 ASTM Standards:
5.1.7 Appearance and extent of deposit prior to removal,
D887 Practices for Sampling Water-Formed Deposits
5.1.8 Type of deposit—whether scale, sludge, biological
D1129 Terminology Relating to Water
deposit, or corrosion product as defined in Practices D887,
E29 Practice for Using Significant Digits in Test Data to
5.1.9 Exact method that was used in removing the sample
Determine Conformance with Specifications
and notes concerning any contamination that might have
occurred during the process,
3. Terminology
5.1.10 Operating temperature and pressure of liquid or
3.1 Definitions—For definitions of terms used in this prac-
vapor in the equipment that contained the deposit,
tice reference should be made to Terminology D1129.
5.1.11 Type of treatment applied to the water that formed
the deposit or to the water that furnished steam to the affected
4. Significance and Use
zone,
4.1 Theresultsareusedtocharacterizethescaleformedand
5.1.12 An account of discrepancies in operating condition
used to evaluate the quality of water used in the unit.
that may have contributed to deposition (for example, water
Characterizing the scale will assist in the design of the water
starving),
treatment process to avoid further scale buildup. The use of
5.1.13 Results of field tests made on the sample or related
equipment, and
5.1.14 Signature of sampler.
This practice 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,
6. Physical Characteristics
On-Line Water Analysis, and Surveillance of Water.
Current edition approved Jan. 1, 2012. Published January 2012. Originally
6.1 The report shall include a description of the physical
approved in 1947. Last previous edition approved in 2007 as D933 – 84 (2007).
characteristics of the sample, including any peculiarities that
DOI: 10.1520/D0933-84R12.
may be pertinent in its further examination.
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
6.2 Characteristics such as the following may be recorded:
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. color, form, (scaly, slimy, drusy, etc.), texture (oily, smooth,
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D933 − 84 (Reapproved 2012)
friable, gritty, etc.), hardness, magnetic properties (as deter- 8.2 For convenience in calculation, values for oxides, acid
mined by test with magnet), and structure (amorphous, crys- anhydrides, and combined water may also be expressed on a
talline, columnar crystals). basis of chemical equivalents. Values for relative equivalents
areobtainedbydividingeachvalueofpercentagebyweightby
7. Completeness and Accuracy of Analysis
the equivalent weight of the respective oxide, acid radical, or
7.1 Thedeterminationstobereportedinacompleteanalysis
water.
shall be those listed in Table 1. For many practical purposes, a
8.3 Quantitative determinations shall be reported to the
less complete analysis will suffice. In other instances the
nearest 0.1 % (8.4).When a quantitative determination is made
location or nature of the deposit or a knowledge of the
and a negative result is obtained, it shall be reported as “0.0”
compositionoftheequipmentaffectedwillsuggesttheneedfor
withanotationastotheamountofsampleusedandthemethod
determinations in addition to those listed.
of determination. When a determination has been omitted, but
7.2 The completeness and accuracy of the analysis should
the heading of the determination is carried in a tabulation with
be carefully appraised before reporting. In a complete analysis,
determinations of other samples, the absence of a determina-
the summation of all determinations under oxides, acid radi-
tionforanyotherspecificsampleshallbeindicatedbyanentry
cals, ether-extractable matter, carbonaceous matter, and com-
“no determination” or by a dash. The terms, “nil,”“ none,” and
bined water shall total 100 62%.
“trace”shallnotbeused.Ifthequalitativedeterminationshows
presence, and a quantitative determination shows absence, the
7.3 A summation in excess of 102 % indicate
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