ASTM D6137-97(2012)
(Test Method)Standard Test Method for Sulfuric Acid Resistance of Polymer Linings for Flue Gas Desulfurization Systems
Standard Test Method for Sulfuric Acid Resistance of Polymer Linings for Flue Gas Desulfurization Systems
SIGNIFICANCE AND USE
3.1 The results obtained by this test method can be used in combination with other test methods for the selection of a lining for surfaces in flue gas desulfurization (FGD) systems that will be exposed to hot unscrubbed flue gas or to scrubbed gas that has been reheated well above the water dew point.
3.1.1 This test method does not evaluate or correlate to areas within the scrubber or scrubbed gas streams at temperatures at or below the water dew point.
3.2 This test method is intended to evaluate the combined effects of heat and exposure to sulfuric acid upon a lining system as applied to a carbon steel substrate. It does not produce the thermal gradient through the lining that may exist in actual applications. Actual lining performance may also be affected by concurrent physical or mechanical effects and other chemicals that may be present in the flue gas.
3.3 This test method evaluates major failure modes of linings applied to square test panels that are cycled from room temperature to a designated elevated temperature.
3.4 The recommended test temperatures of 200°F (93°C) and 350°F (177°C) are based on typical maximum operating zone temperatures in flue gas desulfurizations systems. Other temperatures may be evaluated as desired. Cycling to lower temperatures, including freezing, may be considered if applicable.
3.5 The standard acid concentration for all tests is 20 %, recognizing that the concentration will quickly rise to the equilibrium at the selected test temperature.
SCOPE
1.1 This test method is intended to evaluate the sulfuric acid resistance at elevated temperatures of polymer linings applied to carbon steel substrates subject to sulfuric acid attack.
1.2 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.
1.3 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
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6137 − 97 (Reapproved 2012)
Standard Test Method for
Sulfuric Acid Resistance of Polymer Linings for Flue Gas
Desulfurization Systems
This standard is issued under the fixed designation D6137; 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 D1474 Test Methods for Indentation Hardness of Organic
Coatings
1.1 This test method is intended to evaluate the sulfuric acid
D4138 Practices for Measurement of Dry Film Thickness of
resistance at elevated temperatures of polymer linings applied
Protective Coating Systems by Destructive, Cross-
to carbon steel substrates subject to sulfuric acid attack.
Sectioning Means
1.2 The values stated in inch-pound units are to be regarded
D4417 Test Methods for Field Measurement of Surface
as standard. The values given in parentheses are mathematical
Profile of Blast Cleaned Steel
conversions to SI units that are provided for information only
D5162 Practice for Discontinuity (Holiday) Testing of Non-
and are not considered standard.
conductive Protective Coating on Metallic Substrates
1.3 This standard does not purport to address all of the
2.2 Steel Structures Painting Council Standards
safety concerns, if any, associated with its use. It is the
SSPC VIS 1–89 Visual Standard
responsibility of the user of this standard to establish appro-
SSPC No. SP5 Blast Cleaning to White Metal
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 3. Significance and Use
3.1 The results obtained by this test method can be used in
2. Referenced Documents
combination with other test methods for the selection of a
2.1 ASTM Standards:
lining for surfaces in flue gas desulfurization (FGD) systems
A36/A36M Specification for Carbon Structural Steel
that will be exposed to hot unscrubbed flue gas or to scrubbed
C868 Test Method for Chemical Resistance of Protective
gas that has been reheated well above the water dew point.
Linings
3.1.1 Thistestmethoddoesnotevaluateorcorrelatetoareas
D660 Test Method for Evaluating Degree of Checking of
within the scrubber or scrubbed gas streams at temperatures at
Exterior Paints
or below the water dew point.
D661 Test Method for Evaluating Degree of Cracking of
3.2 This test method is intended to evaluate the combined
Exterior Paints
effects of heat and exposure to sulfuric acid upon a lining
D714 Test Method for Evaluating Degree of Blistering of
system as applied to a carbon steel substrate. It does not
Paints
produce the thermal gradient through the lining that may exist
D772 Test Method for Evaluating Degree of Flaking (Scal-
in actual applications. Actual lining performance may also be
ing) of Exterior Paints
affected by concurrent physical or mechanical effects and other
D1186 Test Methods for Nondestructive Measurement of
chemicals that may be present in the flue gas.
Dry Film Thickness of Nonmagnetic Coatings Applied to
3.3 This test method evaluates major failure modes of
a Ferrous Base (Withdrawn 2006)
linings applied to square test panels that are cycled from room
temperature to a designated elevated temperature.
This test method is under the jurisdiction of ASTM Committee D33 on
3.4 The recommended test temperatures of 200°F (93°C)
ProtectiveCoatingandLiningWorkforPowerGenerationFacilitiesandisthedirect
and 350°F (177°C) are based on typical maximum operating
responsibility of Subcommittee D33.09 on Protective Lining for FGD Systems.
zone temperatures in flue gas desulfurizations systems. Other
Current edition approved Dec. 1, 2012. Published December 2012. Originally
temperatures may be evaluated as desired. Cycling to lower
approved 1997. Last previous edition approved in 2004 as D6137 – 97 (2004). DOI:
10.1520/D6137-97R12.
temperatures, including freezing, may be considered if appli-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
cable.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
The last approved version of this historical standard is referenced on Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor,
www.astm.org. Pittsburgh, PA 15222-4656, http://www.sspc.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6137 − 97 (2012)
3.5 The standard acid concentration for all tests is 20 %, from the side and 1 in. from the top of the panel. The sixteen
recognizing that the concentration will quickly rise to the individual readings and average thickness shall be recorded.
equilibrium at the selected test temperature. 5.3.2 Test the lined surface for holidays in accordance with
Practice D5162. Mark the exact location of any holidays. If the
4. Apparatus
panel will be scribed, perform the holiday test before scribing.
4.1 ForcedAirCirculationOven,capableofmaintainingthe
Repair the holidays in accordance with the lining manufactur-
selected test temperature 64 F° (2C°). Note that acid fumes
er’s recommendations or prepare a new panel.
may damage the oven and a drip pan and protective shroud
5.4 Conditioning of Test Panels:
may be needed.
5.4.1 Condition test panels for a period of 7 days at 73 6
4.2 RackorStand, to support the test panels vertically in the
4°F (23 6 2°C). Additional conditioning of test panels,
oven while maintaining a distance of at least 1 in. (25 mm)
including longer cure times or elevated cure temperature, may
between the panels and between the panels and oven walls.
be conducted if specified. Conditioning time and temperature
shall be recorded and stated in the test report.
5. Test Specimen
6. Procedure
5.1 Substrate:
5.1.1 Test panels shall be new commercial quality, carbon
6.1 Preheat the oven to the required test temperature of
steel conforming to Specification A36/A36M. Panels shall be a
200°F (93°C) or 350°F (177°C) unless otherwise specified.
minimum of ⁄4-in. (6-mm) thick, and 8-in. (200-mm) square,
6.2 Immerse the lower portion of the test panel(s) in a 20 %
and shall have their edges broken or radiused if the lining is to
solution (by volume) of sulfuric acid at laboratory temperature
be wrapped over the edges of the panel.
of 73 6 4°F for 1 h. The upper 4 in. (10 cm.) shall remain
5.1.2 These test panels are large enough and rigid enough
above the fluid level.
for linings and coatings up to ⁄4-in. thick. For thicker linings,
6.3 Remove the test panel(s) and allow to dry for approxi-
the test panels shall be at least 32 times the lining thickness in
mately 15 min in a vertical position at laboratory temperature.
height
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