ASTM D6137-97(2004)
(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
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.
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.
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.
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.
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 the standard. the values given in parentheses are for information only.
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.
Contact ASTM International (www.astm.org) for the latest information
Designation: D6137 − 97 (Reapproved 2004)
StandardTest 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 D4138 Practices for Measurement of Dry Film Thickness of
Protective Coating Systems by Destructive, Cross-
1.1 This test method is intended to evaluate the sulfuric acid
Sectioning Means
resistance at elevated temperatures of polymer linings applied
D4417 Test Methods for Field Measurement of Surface
to carbon steel substrates subject to sulfuric acid attack.
Profile of Blast Cleaned Steel
1.2 The values stated in inch-pound units are to be regarded
D5162 Practice for Discontinuity (Holiday) Testing of Non-
as the standard. The values given in parentheses are for
conductive Protective Coating on Metallic Substrates
information only.
2.2 Steel Structures Painting Council Standards
1.3 This standard does not purport to address all of the
SSPC VIS 1–89 Visual Standard
safety concerns, if any, associated with its use. It is the SSPC No. SP5 Blast Cleaning to White Metal
responsibility of the user of this standard to establish appro-
3. Significance and Use
priate safety and health practices and determine the applica-
3.1 The results obtained by this test method can be used in
bility of regulatory limitations prior to use.
combination with other test methods for the selection of a
2. Referenced Documents
lining for surfaces in flue gas desulfurization (FGD) systems
that will be exposed to hot unscrubbed flue gas or to scrubbed
2.1 ASTM Standards:
gas that has been reheated well above the water dew point.
A36/A36M Specification for Carbon Structural Steel
3.1.1 Thistestmethoddoesnotevaluateorcorrelatetoareas
C868 Test Method for Chemical Resistance of Protective
within the scrubber or scrubbed gas streams at temperatures at
Linings
or below the water dew point.
D660 Test Method for Evaluating Degree of Checking of
Exterior Paints
3.2 This test method is intended to evaluate the combined
D661 Test Method for Evaluating Degree of Cracking of
effects of heat and exposure to sulfuric acid upon a lining
Exterior Paints
system as applied to a carbon steel substrate. It does not
D714 Test Method for Evaluating Degree of Blistering of
produce the thermal gradient through the lining that may exist
Paints
in actual applications. Actual lining performance may also be
D772 Test Method for Evaluating Degree of Flaking (Scal-
affected by concurrent physical or mechanical effects and other
ing) of Exterior Paints
chemicals that may be present in the flue gas.
D1186 Test Methods for Nondestructive Measurement of
3.3 This test method evaluates major failure modes of
Dry Film Thickness of Nonmagnetic Coatings Applied to
linings applied to square test panels that are cycled from room
a Ferrous Base (Withdrawn 2006)
temperature to a designated elevated temperature.
D1474 Test Methods for Indentation Hardness of Organic
3.4 The recommended test temperatures of 200°F (93°C)
Coatings
and 350°F (177°C) are based on typical maximum operating
zone temperatures in flue gas desulfurizations systems. Other
This test method is under the jurisdiction of ASTM Committee D33 on
temperatures may be evaluated as desired. Cycling to lower
ProtectiveCoatingandLiningWorkforPowerGenerationFacilitiesandisthedirect
responsibility of Subcommittee D33.09 on Protective Lining for FGD Systems. temperatures, including freezing, may be considered if appli-
Current edition approved Jan. 1, 2004 Published January 2004. Originally
cable.
approved 1997. Last previous edition approved in 1997 as D6137 – 97. DOI:
3.5 The standard acid concentration for all tests is 20 %,
10.1520/D6137-97R04.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
recognizing that the concentration will quickly rise to the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
equilibrium at the selected test temperature.
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 The Society for Protective Coatings (SSPC), 40 24th St., 6th
www.astm.org. Floor, Pittsburgh, PA 15222-4656.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6137 − 97 (Reapproved 2004)
4. Apparatus 5.3.2 Test the lined surface for holidays in accordance with
Practice D5162. Mark the exact location of any holidays. If the
4.1 Forced Air Circulation Oven , capable of maintaining
panel will be scribed, perform the holiday test before scribing.
the selected test temperature 6 4 F° (2C°). Note that acid
Repair the holidays in accordance with the lining manufactur-
fumes may damage the oven and a drip pan and protective
er’s recommendations or prepare a new panel.
shroud may be needed.
5.4 Conditioning of Test Panels :
4.2 RackorStand, to support the test panels vertically in the
5.4.1 Condition test panels for a period of 7 days at 73 6
oven while maintaining a distance of at least 1 in. (25 mm)
4°F (23 6 2°C). Additional conditioning of test panels,
between the panels and between the panels and oven walls.
including longer cure times or elevated cure temperature, may
be conducted if specified. Conditioning time and temperature
5. Test Specimen
shall be recorded and stated in the test report.
5.1 Substrate:
5.1.1 Test panels shall be new commercial quality, carbon
6. Procedure
steel conforming to Specification A36/A36M. Panels shall be a
6.1 Preheat the oven to the required test temperature of
minimum of ⁄4-in. (6-mm) thick, and 8-in. (200-mm) square,
200°F (93°C) or 350°F (177°C) unless otherwise specified.
and shall have their edges broken or radiused if the lining is to
be wrapped over the edges of the panel. 6.2 Immerse the lower portion of the test panel(s) in a 20 %
solution (by volume) of sulfuric acid at laboratory temperature
5.1.2 These test panels are large enough and rigid enough
of 73 6 4°F for 1 h. The upper 4 in. (10 cm.) shall remain
for linings and coatings up to ⁄4-in. thick. For thicker linings,
the test panels shall be at least 32 times the lining thickness in above the fluid level.
height and width.
6.3 Remove the test panel(s) and allow to dry for approxi-
5.1.3 Two control test panels shall be prepared for each
mately 15 min in a vertical position at laboratory temperature.
lining system tested. One shall be cycled between the selected
6.4 Place the test panel(s) in the preheate
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