1、Designation:D549994(Reapproved 2021)Standard Test Methods forHeat Resistance of Polymer Linings for Flue GasDesulfurization Systems1This standard is issued under the fixed designation D5499;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revi
2、sion,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods are intended to evaluate the resis-tance of polymer linings applied to carbon steel sub
3、strates toelevated temperatures.Two separate methods are included asfollows:1.1.1 Test Method A Continuous elevated temperatureexposure,and1.1.2 Test Method B Cycling elevated temperature expo-sure.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parenthese
4、s are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety
5、,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of Inte
6、rnational Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A36/A36M Specification for Carbon Structural SteelD660 Test Method for Evaluating Degree of Checking ofExterior PaintsD661 Test Me
7、thod for Evaluating Degree of Cracking ofExterior PaintsD714 Test Method for Evaluating Degree of Blistering ofPaintsD772 Test Method for Evaluating Degree of Flaking(Scal-ing)of Exterior PaintsD1474 Test Methods for Indentation Hardness of OrganicCoatingsD4417 Test Methods for Field Measurement of
8、SurfaceProfile of Blast Cleaned SteelD4541 Test Method for Pull-Off Strength of Coatings UsingPortable Adhesion Testers2.2 Steel Structures Painting Council Standards(SSPC):3SSPC VIS 189 Visual StandardSSPC No.SP5 Blast Cleaning to White MetalSSPC PA-2 Measurement of Dry Paint Thickness withMagnetic
9、 Gauges3.Significance and Use3.1 The results obtained by these test methods can be usedin combination with other test methods for the selection of alining in flue gas desulfurization(FGD)systems.3.2 These methods are intended to evaluate effects of heatalone upon a lining system as applied to a carb
10、on steelsubstrate.These methods do not produce the thermal gradientthat may exist in actual applications.Actual lining performancemay also be effected by concurrent physical mechanical orchemical effects.3.3 These methods evaluate major failure modes of liningsapplied to square test panels.3.4 The r
11、ecommended test temperatures of 200F(93C)and 350F(177C)are based on typical maximum operatingzone temperatures in flue gas desulfurizations systems.Othertemperatures may be evaluated as desired.4.Apparatus4.1 Forced-air Circulation Oven,capable of maintaining theselected test temperature within 4F(2
12、C).4.2 A Rack or Stand to support the test panels vertically inthe oven while maintaining a distance of at least 1 in.(25 mm)between the panels and between the panels and oven walls.1These test methods are under the jurisdiction of ASTM Committee D33 onProtective Coating and Lining Work for Power Ge
13、neration Facilities and is the directresponsibility of Subcommittee D33.09 on Protective Lining forAir Quality ControlSystems.Current edition approved Feb.1,2021.Published March 2021.Originallyapproved in 1994.Last previous edition approved in 2013 as D5499 94(2013).DOI:10.1520/D5499-94R21.2For refe
14、renced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Society for Protective Coatings(SSPC),40 24th St.,6th Floor
15、,Pittsburgh,PA 15222-4656,http:/www.sspc.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision o
16、n Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.15.Test Specimens5.1 Substrate:5.1.1 Test panels shall be new commercial quality carbonsteel conforming to Specification A36/A36M.Panels shall be aminimum of14in.(6 mm)thick,and 8 in.(200 mm)square.5.1.2 These test panels are large enough and rigid enoughfor linings and coatings up to 0.25-in.(6-mm)thick.Forthicker linings,the test
