1、Designation:D557116Standard Test Method forEnvironmental Stress Crack Resistance(ESCR)of PlasticTighthead Drums Not Exceeding 60 Gal(227 L)in RatedCapacity1This standard is issued under the fixed designation D5571;the number immediately following the designation indicates the year oforiginal adoptio
2、n 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 provides an indication of the environ-mental stress crack resista
3、nce of plastic tighthead drums as asummation of the effects of container design,resin,manufac-turing conditions,field performance,and other factors.1.2 This test method may be used to evaluate a plasticdrums resistance to failure by cracking when in the presenceof chemical and physical stresses.1.3
4、Two procedures are provided as follows:1.3.1 Procedure AInternal pressure stress crack resistancemethod to nonyl phenoxypoly(ethyleneoxy)ethanol solution,a stress cracking reagent.The internal pressure is controlled ata constant elevated pressure and temperature.1.3.2 Procedure BTop-load stress crac
5、k resistance methodto nonyl phenoxypoly ethanol,a stress cracking reagent.Thecompressive top load is controlled at a constant weight whilemaintaining an elevated temperature.1.4 Although these procedures are not designed to test theability of the closure or closure gasket material to retain the test
6、reagent,the inclusion of closure failure as a container failuremode is optional.However,leakage through a closure mayaffect the internal pressure that could affect the test results.1.5 This test method does not attempt to address all factorsthat could lead to stress cracking of plastic drums.The use
7、r ofthis standard may use other test parameters,such as top loads,chemical reagents,etc.,as agreed upon between the user andsupplier in the event of a drum qualification or purchaseagreement.1.6 The values stated in inch-pound units are to be regardedas the standard.The SI units given in parentheses
8、 are forinformation only.1.7 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
9、to use.Specific warningstatements are given in 6.2.2.Referenced Documents2.1 ASTM Standards:2D996 Terminology of Packaging and Distribution Environ-mentsD4577 Test Method for Compression Resistance of a Con-tainer Under Constant LoadE122 Practice for Calculating Sample Size to Estimate,WithSpecified
10、 Precision,the Average for a Characteristic of aLot or Process3.Terminology3.1 DefinitionsReference Terminology D996 for defini-tions of terms applicable to this test method.3.2 Definitions of Terms Specific to This Standard:3.2.1 environmental stress cracka crack that developswhen a plastic drum is
11、 exposed to chemical and physicalstresses.3.2.2 plastic tighthead drumA non-removable head plas-tic drum,maximum capacity not exceeding 60 gal(227 L),with openings for filling and emptying not exceeding 2.76 in.(70 mm)in diameter.3.2.3 stress crack failureany environmental stress crackthat penetrate
12、s through the thickness of the drum resulting in aloss or leakage of the test reagent shall be interpreted as afailure.4.Summary of Test Method4.1 Procedure AExposes a minimum of three partly filledplastic drums to the action of a stress cracking reagent,within1This test method is under the jurisdic
13、tion of ASTM Committee D10 onPackaging and is the direct responsibility of Subcommittee D10.21 on ShippingContainers and Systems-Application of Performance Test Methods.Current edition approved June 1,2016.Published July 2016.Originally approvedin 1994.Last previous edition approved in 2010 as D5571
14、94(2010).DOI:10.1520/D5571-16.2For 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.Copyright ASTM International,100 Bar
15、r Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 the container,at an elevated internal pressure and elevatedtemperature.The test duration shall be 14 days,or as specifiedby the user.4.2 Procedure BExposes a minimum of three plasticdrums to a mechanical top load at elevated t
16、emperatures.Thedrums are filled to rated capacity with a stress cracking reagentand sealed prior to the load being applied.The test durationshall be 14 days,or as specified by the user.5.Significance and Use5.1 These procedures provide an indication of the environ-mental stress-crack resistance of plastic tighthead drums.Thistest method may be used for determining the applicability ofvarious plastic resins,mold designs,processing techniques andparameters for plastic tighthead drums.5.2 Environme