1、Designation: D3667 05 (Reapproved 2010)Standard Specification forRubber Seals Used in Flat-Plate Solar Collectors1This standard is issued under the fixed designation D3667; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers the gener
3、al requirements formaterials used in rubber seals of flat-plate solar collectors,except vertically mounted passive collectors. Particular appli-cations may necessitate other requirements that would takeprecedence over these requirements when specified.1.2 The design requirement pertains only to perm
4、issibledeflections of the rubber during thermal expansion or contrac-tion of the seal in use and the tolerances in dimensions ofmolded and extruded seals.1.3 This specification does not include requirements per-taining to the fabrication or installation of the seals.NOTE 1Practices G151 and G155 are
5、 performance-based practicesthat replace Practice G26 cited in previous versions of D3667. PracticeG26 described very specific designs for devices used for xenon arcexposure. The apparatus described in Practice G26 is covered by thepractices that replace it.1.4 The values stated in SI units are to b
6、e regarded asstandard. No other units of measurement are included in thisstandard.1.5 The following safety hazards caveat pertains only toSection 9, Test Methods, of this specification: This standarddoes not purport to address all of the safety concerns, if any,associated with its use. It is the res
7、ponsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards:2C661 Test Method for Indentation Hardness of Elastomeric-Type Sealants by Means of a DurometerC
8、717 Terminology of Building Seals and SealantsC719 Test Method for Adhesion and Cohesion of Elasto-meric Joint Sealants Under Cyclic Movement (HockmanCycle)D395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD865 Test Method
9、 for RubberDeterioration by Heating inAir (Test Tube Enclosure)D1149 Test Methods for Rubber DeteriorationCrackingin an Ozone Controlled EnvironmentD1229 Test Method for Rubber PropertyCompression Setat Low TemperaturesD1349 Practice for RubberStandard Temperatures forTestingD1415 Test Method for Ru
10、bber PropertyInternationalHardnessD1566 Terminology Relating to RubberD2137 Test Methods for Rubber PropertyBrittlenessPoint of Flexible Polymers and Coated FabricsD2240 Test Method for Rubber PropertyDurometerHardnessD3182 Practice for RubberMaterials, Equipment, andProcedures for Mixing Standard C
11、ompounds and Prepar-ing Standard Vulcanized SheetsD3183 Practice for RubberPreparation of Pieces for TestPurposes from ProductsG7 Practice for Atmospheric Environmental Exposure Test-ing of Nonmetallic MaterialsG26 Practice for Operating Light-Exposure Apparatus(Xenon-Arc Type) With and Without Wate
12、r for Exposureof Nonmetallic Materials3G151 Practice for Exposing Nonmetallic Materials in Ac-celerated Test Devices that Use Laboratory Light SourcesG155 Practice for Operating XenonArc LightApparatus forExposure of Non-Metallic Materials2.2 Other Standards:4RMA Handbook Rubber Products: Molded, Ex
13、truded,Lathe Cut, and Cellular1This specification is under the jurisdiction ofASTM Committee D11 on Rubberand is the direct responsibility of Subcommittee D11.37 on Coated Fabrics, RubberThreads and Seals.Current edition approved June 1, 2010. Published December 2010. Originallyapproved in 1978. Las
14、t previous edition approved in 2005 as D3667 05. DOI:10.1520/D3667-05R10.2For referenced 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 A
15、STM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.4Available from Rubber Manufacturers Association (RMA), 1400 K St., NW,Suite 900, Washington, DC 20005, http:/www.rma.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West
16、 Conshohocken, PA 19428-2959, United States.3. Terminology3.1 DefinitionsRefer to the definitions of terms in Termi-nology C717 and Terminology D1566.4. Classification4.1 Types:4.1.1 Type C, intended for use in cold climates (below -10C in winter).4.1.2 Type W, intended for use in warm climates (abo
17、ve -10C in winter).4.2 Grades:4.2.1 Grade designations represent differing degrees ofhardness as follows:4.2.1.1 Grade 2, hardness of 20 6 5.4.2.1.2 Grade 3, hardness of 30 6 5.4.2.1.3 Grade 4, hardness of 40 6 5.4.2.1.4 Grade 5, hardness of 50 6 5.4.2.1.5 Grade 6, hardness of 60 6 5.4.2.1.6 Grade 7
18、, hardness of 70 6 5.4.2.1.7 Grade 8, hardness of 80 6 5.NOTE 2The grade to be used in a particular application depends onthe design of the seal and must be specified by the designer.4.3 Classes:4.3.1 Seals shall be classified as follows:4.3.1.1 Class PS, preformed rubber seal.4.3.1.2 Class SC, seal
19、ing compound.NOTE 3Class SC material should not be used in designs where theseal is under mechanical stress.5. Materials and Manufacture5.1 Seals shall be rubber vulcanizates conforming to therequirements in Section 6 and resistant to deterioration by solarradiation.5.1.1 Resistance to solar radiati
20、on can be determined byeither desert outdoor exposure in accordance with Practice G7,or laboratory exposure to a xenon arc in accordance withPractices G151 and G155. Desert outdoor exposure usingunbacked specimens at an angle of 45 shall be for at least sixmonths including at least one month precedi
21、ng and followingthe summer solstice. Laboratory exposure shall use windowglass filters and the exposure device shall be programmed forcontinuous light only. The irradiance level shall be set at 0.35W/(m2.nm) at 340 nm at the control point. For the equivalentirradiance setting specifications for broa
22、d band measurementsof 300400 nm and 300800 nm, consult the namufacturer ofthe apparatus. The uninsulated black panel temperature shall beset at 70 C at the control point. In devices that controlchamber air temperature, it shall be set at 47 C. The relativehumidity shall be set at 30 % at the control
23、 point. Exposureduration shall be for at least 1000 h, but of sufficient length toproduce a statistically significant change in the property ofinterest in a product known to give poor performance so thatthe test is able to identify an unacceptable material. Afterexposure, slight surface chalking and
24、 dulling are permitted.Brittleness, cracking, loss of elongation, tackiness, or otherdeterioration affecting serviceability shall not be permitted.NOTE 4For the allowed operational fluctuations of the specified setpoints for irradiance, temperature, and relative humidity, refer toTable A3.1 in G151.
25、 If the actual operating conditions do not comply withthe maximum allowable fluctuations in Table A3.1 after the equipment hasstabilized, discontinue the test and correct the cause of the problem beforecontinuing.6. Requirements6.1 Class PS material shall conform to the requirementsgiven in Table 1.
26、TABLE 1 Requirements for Class PS Material Used to Seal Flat-Plate Solar CollectorsPropertyGradeASTM TestMethod34 5 678Ultimate elongation, min, % 350 300 250 200 150 100 D412Compression set, max, %:after 70 h at 150C 30 30 30 30 30 30 D395Aafter 166 h at 10C 60 60 60 60 60 60 D1229BResistance to he
27、ating (for 166 h at150C):CD865Hardness change, max 10 10 10 10 10 10 D1415 orD2240Ultimate elongation change, max, % 30 30 30 30 30 30 D412Tensile strength change, max, % 20 20 20 20 20 20 D412Volatiles lost, max, % 1 1 1 1 1 1 See 9.3Volatiles condensible, max, % 0.1 0.1 0.1 0.1 0.1 0.1 See 9.4Resi
28、stance to ozone: D1149100 mPa,Dfor 166 h at 40C No crackingResistance for low temperature: D2137Type C only, max, C 40 40 40 40 40 40AMethod B.BSet to be measured at 10 s after release. Lubricated plates or polytetrafluoroethylene film is recommended if the rubber adheres to the metal compression pl
29、ates duringtest.CThe test temperature of 150C is used to test seals for cover plates. A seal in contact with an absorber plate should be tested at a standard test temperature listedin Practice D1349 next above the maximum temperature of the absorber plate in service (which generally occurs under sta
30、gnation conditions and maximum radiation flux)but not less than 150C. The higher test temperatures are: 175, 200, 225, and 250.D100 mPa of ozone partial pressure is equivalent to 100 pphm at standard atmospheric pressure (100 kPa). See new terminology on ozone content expressionsdescribed in Test Me
31、thod D1149.D3667 05 (2010)26.2 Class SC material shall conform to the requirementsgiven in Table 2.7. Dimensions7.1 The design of the seal shall not permit the rubber todeflect more than 25 % in any direction during thermalexpansion and contraction of the solar collector.NOTE 5If the thermal coeffic
32、ient of linear expansion for the rubber isnot known, a value of 0.0003/K may be assumed for design purposes.7.2 The tolerances in dimensions shall conform to thefollowing designations in the RMA Handbook:7.2.1 Molded Seals:7.2.1.1 Commercial DimensionsRMA A3-F3-T.032.7.2.1.2 Critical DimensionsRMA A
33、2-F3-T.032.7.2.2 Extruded Seals:7.2.2.1 Commercial DimensionsRMA A2-F3.8. Workmanship, Finish, and Appearance8.1 Class PS seals shall be free of blisters, checks, cracks,and other imperfections that can affect their ability to make ormaintain a watertight seal.8.2 Class SC material shall be uniform
34、in composition andbe free of defects that may affect serviceability.9. Test Methods9.1 Class PS MaterialPrepare the specimens as pre-scribed in Practice D3183 and test the material in accordancewith the test methods given in Table 1. For control ofproduction, specimens may be taken from standard tes
35、t sheetsprepared in accordance with Practice D3182, using the sameunvulcanized material used to prepare the seals and vulcaniz-ing the material at the same temperature used for the seals to anequivalent state of vulcanization.9.2 Class SC MaterialPrepare five sheets approximately150 by 150 by 2 mm i
36、n accordance with instructions suppliedwith the sealing material. Also, prepare five adhesion speci-mens in accordance with Test Method C719. Preferably,prepare each sheet and adhesion specimen from material in adifferent container. Condition the sheets and adhesion speci-mens for 14 days at a tempe
37、rature of 23 C and relativehumidity of 50 %. Test the material in accordance with the testmethods given in Table 2.9.3 Determine volatiles lost from the difference in mass ofthe specimens before and after heating for 166 h at thetemperature given in Table 1 or Table 2 and as prescribed inTest Method
38、 D865.9.4 Determine volatiles condensable at 23 C from thedifference in mass of the outlet tubes before and after heatingthe specimens for 166 h at the temperature given in Table 1 orTable 2 in accordance with Test Method D865. If necessary,cool the exposed portion of the outlet tube with a stream o
39、f airto maintain a temperature of 23 6 2 C. If any volatilescondense on the inlet tube or other parts of the apparatus, addthe mass of this condensed material to the mass of the materialon the outlet tube.10. Inspection and Rejection10.1 Class PS MaterialManufacturers of preformed sealsmay use their
40、 quality control systems for production inspectionto ensure the seals conform with this specification, providedappropriate records are kept. In case of dispute regarding thequality of a delivered product, a sample of five seals shall betaken from the lot and tested for compliance with this specifi-c
41、ation. If one of the five seals does not conform, a secondsample of five seals may be taken and tested. If two or more ofthe ten seals do not conform, the lot may be rejected.10.2 Class SC MaterialManufacturers may use their qual-ity control systems to ensure production conforms with thisspecificati
42、on. In case of dispute regarding the quality of adelivered product, five test sheets and five adhesion specimensshall be prepared, preferably from five different packages, inaccordance with the instructions supplied with the sealingmaterial. If one of the five sheets or adhesion specimens doesnot co
43、nform, an additional five sheets or adhesion specimensmay be prepared and tested. If two or more of the ten sheets oradhesion specimens do not conform, the lot may be rejected.11. Product Marking11.1 The following information shall be marked either onthe seal, packaging, label, or tag:11.1.1 Name, b
44、rand, or trademark of the manufacturer,11.1.2 Type and grade,11.1.3 Compliance with Specification D3667, and11.1.4 Other information required by the manufacturer orpurchaser.TABLE 2 Requirements for Class SC Material Used to Seal Flat-Plate Solar CollectorsProperty Grade ASTM TestMethod234Ultimate e
45、longation, min, % 200 150 100 D412Resistance to heating (for 166 h at 125C) D865Hardness change, max 10 10 10 C661Ultimate elongation change, max, % 30 30 30 D412Tensile strength change, max, % 20 20 20 D412Volatiles lost, max, % 1 1 1 See 9.3AVolatiles condensible, max, % 0.1 0.1 0.1 See 9.4AResist
46、ance to ozone: D1149100 mPa, for 166 h at 40C No crackingResistance to low temperature D2137Type C only, max, C 40 40 40Adhesion loss, max, cm2B999C719AThis test is not required if the design precludes condensing of the volatiles on the cover plate(s) of the solar collector.BThe combined loss in bon
47、d and cohesion areas for the three specimens tested shall not exceed 9 mm2.D3667 05 (2010)312. Packaging and Package Marking12.1 Material shall be protected by suitable packaging toprevent damage during shipment or storage prior to installationin the solar collector.13. Keywords13.1 flat-plate solar
48、 collectors; preformed seals; rubber;sealing compoundsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent r
49、ights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may
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