1、Designation:D549994(Reapproved 2013)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 This test method is intended to evaluate the resistance ofpolymer linings applied to carbon steel substrat
3、es to elevatedtemperatures.Two separate methods are included as follows: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 parentheses ar
4、e 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 and
5、 health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A36/A36M Specification for Carbon Structural SteelD660 Test Method for Evaluating Degree of Checking ofExterior PaintsD661 Test Method for Evaluating Degree of Cracking
6、 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 SurfaceProfile of Blast Cleaned SteelD
7、4541 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 Gauges3.Significance and Use3.1 The r
8、esults 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 carbon steelsubstrate.These methods do not
9、 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 recommended test temperatures of 200F(9
10、3C)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(2C).4.2 A Rack or Stand to support the
11、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.5.Test Specimens5.1 Substrate:5.1.1 Test panels shall be new commercial quality carbonsteel conforming to Specification A36/A36M.Panels shall be aminimum of
12、14in.(6 mm)thick,and 8 in.(200 mm)square.1This test method is under the jurisdiction of ASTM Committee D33 onProtective Coating and Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.09 on Protective Lining for FGD Systems.Current edition approved July 1,
13、2013.Published July 2013.Originally approvedin 1994.Last previous edition approved in 2007 as D5499 94(2007).DOI:10.1520/D5499-94R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informati
14、on,refer to the standards Document Summary page onthe ASTM website.3Available from Society for Protective Coatings(SSPC),40 24th St.,6th Floor,Pittsburgh,PA 15222-4656,http:/www.sspc.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1
15、.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 panels shall be at least 32 times thelining thickness in each direction.5.1.3 One test panel shall be prepared for each testtemperature,for each method(Test Method A o
16、r Test MethodB),in addition to a control panel,which shall be maintained atlaboratory conditions without elevated temperature exposure.5.2 Preparation:5.2.1 Prepare one side of each panel in accordance withSSPC No.SP5 to the degree of cleanliness represented inSSPC VIS 189.Clean,new,angular abrasive shall be used.The surface profile shall be as recommended by the liningmanufacturer.Determine and record the average profile depthin accordance with Test Method D4417,Test Method A usinga visual surf
