ASTM_F_2331_-_11.pdf

Designation:F233111Standard Test Method forDetermining Chemical Compatibility of Substances inContact with Thermoplastic Pipe and Fittings Materials1This standard is issued under the fixed designation F2331;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.Scope*1.1 This test method is used for determining chemicalcompatibility of substances in contact with thermoplastic pipeand fittings materials.1.2 This test method is not intended to evaluate the suitabil-ity of solvent cements or adhesives used to join plastic piping.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 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 to determine theapplicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D638 Test Method for Tensile Properties of Plastics3.Summary of Test Method3.1 The procedure uses tensile specimen test bars in alongitudinal tensile test geometry in a constant load(creep)method.All procedures are run at an ambient temperature of73F(23C).4.Significance and Use4.1 These procedures can be used to evaluate chemicals ormaterials expected to come in contact with plastic pipingrelative to causing environmental stress-cracking in thermo-plastic materials.This testing results in determining time-to-failure vs.engineering stress.This procedure can also be usedin stress-rupture regression analysis,where a variety of stresslevels are needed.The methodology can be readily adapted toconducting immersion tests in liquids or testing temperaturesother than 73F(23C).5.Interferences5.1 In these procedures,there may be interference effectsdue to differences in resin or the additives in the thermoplasticmaterials.Until such time as data is available to address this,the user should take this into consideration when applying thistest method.6.Apparatus6.1 Apparatus for constant tensile method.6.1.1 Constant-tensile-load test apparatus which maintainsthe load to within 61%throughout the test duration.6.1.2 Immersion vessels which can be mounted to thetensile-load apparatus(if applicable).7.Test Specimen7.1 Test bars may be either fabricated from compressionmolded plaques,injection molded,or cut from finished prod-uct.Test times and/or stress levels may be reduced byincorporating a knit-line into an injection-molded test bar.If aknit-line is present,the mold should be designed such that theknit-line occurs in the center of the bar,perpendicular to thelongitudinal axis.7.2 A Type IV specimen as shown in Test Method D638shall be used for referee testing.Other specimen geometries areacceptable if shown to provide equivalent results.8.Calibration and Standardization8.1 All test instrumentation shall be calibrated to standardstraceable to a national standards agency such as the NationalInstitute of Standards and Technology in the United States.9.Conditioning9.1 Condition the specimens and the test chemical ormaterial for 40 hours at 73F 6 4(23 6 2C)and 50%610%RH prior to applying the test chemical or material to thespecimen.1This test method is under the jurisdiction of ASTM Committee F17 and is thedirect responsibility of Subcommittee F17.40 on Test Methods.Current edition approved Dec.1,2011.Published January 2012.Originallyapproved in 2004 as D233104.Last previous edition approved in 2004 asD2331041.DOI:10.1520/F2331-11.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 10.Procedure10.1 Constant tensile method10.1.1 Attach the grips to the test specimen.The ends of thegrips shall be at least 0.75 in.(15 mm)from the area where thetest material is being applied.If testing in an immersionapparatus,this requirement does not apply,failures within 0.25in.(6.4 mm)of the grip shall not be considered a valid test.10.1.2 If using a semi-solid paste material,wrap the speci-mens with plastic wrap or aluminum foil to prevent evapora-tion of liquid components of the paste.10.1.3 If using a liquid,the test specimen must be immersedin the liquid or otherwise exposed in direct contact with theliquid until failure.This exposure should only be used if thechemical agent remains as a liquid for the