ASTM_E_1069_-_85_2009.pdf

Designation:E106985(Reapproved 2009)Standard Test Method forTesting Polymeric Seal Materials for Geothermal or HighTemperature Service,or both,Under Sealing Stress1This standard is issued under the fixed designation E1069;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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 covers the initial evaluation of(screen-ing)polymeric materials for seals under static sealing stressand at elevated temperatures.1.2 This test method applies to geothermal service only ifused in conjunction with Test Method E1068.1.3 The test fluid is distilled water.1.4 The values stated in SI units are to be regarded as thestandard.The values in parentheses are for information only.1.5 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 health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1414 Test Methods for Rubber O-RingsE1068 Test Method for Testing Nonmetallic Seal Materialsby Immersion in a Simulated Geothermal Test Fluid2.2 SAE Standard:ANSI/SAE AS568A Aerospace Size Standard for O-Rings33.Summary of Test Method3.1 Standard O-ring specimens are tested in a test fixturethat has a closely controlled extrusion gap.3.2 Temperature is applied to the test fixture,with testspecimens,and then pressure is applied.3.3 The test fluid is distilled water.3.4 Test pressure and temperature are maintained untilspecimen seal leaks or until the end of prescribed duration.3.5 More than one specimen may be tested at one time in thefixture.4.Significance and Use4.1 Static seal failures are predominately due to incompat-ibility with media,degradation by temperature extremes,andextrusion stress.This test method may be used for relativeperformance evaluation screening,and is normally the secondstage of the screening process after immersion testing inaccordance with Test Method E1068.4.2 This test method shows relative performance of materi-als under the combined effects of temperature,pressure,andextrusion stress.It does not necessarily correlate with actualservice conditions.This test method is not intended to includethe effect of test media.4.3 Avariety of test parameter combinations are provided sothat evaluations can be made for a specific application.4.4 This test method uses standard O-rings as test speci-mens.5.Apparatus5.1 Test Fixture,is shown in Fig.1.5.2 The apparatus shall include an oven for heating the testfixture to a controlled temperature as selected.5.2.1 The oven should be protected from damage by testfluid leakage due to seal failure.5.3 Safety Controls,shall be provided to protect the testfixture from overpressure and overheating.5.4 Fixture Rings,should all provide the same clearance gapfor any specific test.5.5 Standard clearance gaps are given in Table 1.6.Test Fluid6.1 The test fluid is distilled water.7.Test Temperature7.1 The test temperature shall be one selected from Table 2.1This test method is under the jurisdiction of ASTM Committee E44 on Solar,Geothermal and Other Alternative Energy Sourcesand is the direct responsibility ofSubcommittee E44.15 on Geothermal Field Development,Utilization and Materials.Current edition approved April 1,2009.Published June 2009.Originallyapproved in 1985.Last previous edition approved in 2003 as E117585(2003).DOI:10.1520/E1069-85R09.2For 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 ASTM website.3Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.Test Pressure8.1 The test pressure,65%,shall be one selected fromTable 3.9.Test Specimen9.1 Standard specimens are o-rings with a 37.47 mm(1.475in.)inside diameter and 5.33 mm(0.210 in.)diameter crosssection,as specified in ANSI/SAE AS568A(size dash num-ber 325).9.2 Elastomeric test specimens shall be made to dimensionsand tolerances specified in ANSI/SAE AS568A.9.3 Specimens of materials which have elastic propertiesthat prevent proper sealing performance in the standard testfixture,may be modified in dimension or shape,or both.9.4 O-Ring seal specimen shall be measured in accordancewith Test Methods D1414 and ANSI/SAE AS568A.10.Test Duration10.1 Test duration shall be as specified in 11.2 or untilfailure,whichever occurs first.10.2 Standard test durations are as follows(0%,+2%):6,70,and 120 h.10.3 Test duration begins when both th