1、Designation:F45013An American National StandardStandard Test Methods forVacuum Cleaner HoseDurability and Reliability(Plastic)1This standard is issued under the fixed designation F450;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,t
2、he year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of the effectof anticipated stresses and strains that vacuum cleaner an
3、dextractor hoses will receive in normal use.1.2 These test methods apply to plastic(regular and rein-forced)vacuum cleaner and extractor hoses for household use.1.3 The following tests are included:SectionTorsional flex6Hot and cold flex with aging7Abrasion,external surfaces8Flex9Pull test on hose f
4、ittings with aging10Crush11Stretch ratio12Extractor hoses131.4 These test methods are individual tests as agreed uponbetween the hose and vacuum manufacturer.1.5 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI unit
5、s that are provided for information onlyand are not considered standard.1.6 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
6、applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D638 Test Method for Tensile Properties of PlasticsD695 Test Method for Compressive Properties of RigidPlasticsF395 Terminology Relating to Vacuum CleanersF595 Test Methods for Vacuum Cleaner HoseDurabili
7、tyand Reliability(All-Plastic Hose)(Withdrawn 2010)33.Terminology3.1 DefinitionsRefer to Terminology F395.4.Significance and Use4.1 These test methods can be used by buyers of vacuumcleaner hose to specify the test criteria the hose must meet tobe acceptable for their purposes.5.Sampling5.1 The samp
8、le size shall be one that is mutually agreedupon between the hose manufacturer and the vacuum cleanermanufacturer.TEST METHODS6.Torsional Flex Test6.1 ScopeThis test method covers the determination of theadhesion of the reinforcement wire coating to the hose jacket,the jacket strength,and the streng
9、th of the reinforcement wirefor plastic hose with inside diameter from 1 to 2 in.(25 to 51mm).6.2 ApparatusThe apparatus shown in Fig.1 is suitablefor this test method with the following provisions:6.2.1 Means to rotate test mandrel in a horizontal plane at 206 1 rpm,both clockwise and counter-clock
10、wise.6.2.2 Test weight of 48 6 1 oz(1360 6 28 g)with provisionto attach to sample hose.6.2.3 Suitable clamp to attach sample hose to mandrel thatretains the hose without causing failure at the clamp during thetest.6.2.4 Test mandrel with diameter same as inside diameter ofhose with 0.078 in.(2.0 mm)
11、radius at the ends of the mandrel(see Fig.1).6.2.5 Guide for weight to prevent hose sample from swing-ing during test cycle.6.2.6 Instrument to measure cycles to failure or to a speci-fied end point.1These methods are under the jurisdiction of ASTM Committee F11 on VacuumCleaners and are the direct
12、responsibility of Subcommittee F11.30 on Durability-Reliability.Current edition approved May 1,2013.Published June 2013.Originallyapproved in 1979.Last previous edition approved in 2009 as F450 09.DOI:10.1520/F0450-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM
13、Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,W
14、est Conshohocken,PA 19428-2959.United States1 6.3 Test SpecimenThe specimen shall be a length of hose24 6 1 in.(610 6 25 mm)without fittings.6.4 ConditioningCondition the specimens at an ambienttemperature of 68 to 81F(20 to 27C)for not less than 1 hprior to test.6.5 Procedure:6.5.1 Conduct the test
15、s at 68 to 81F(20 to 27C).6.5.2 Clamp the specimen to the test hose mandrel as shownin Fig.1 and attach a weight to other end of hose sample.6.5.3 Set measuring instrument at zero or record the initialreading.6.5.4 Test half of the specimens by rotating clockwise andthe other half by rotating counte
16、r-clockwise at 20 6 1 rpm untilfailure or to a specified end point.6.5.5 Failure may be evidenced by a broken reinforcingwire,tear,or hole that penetrates the hose jacket,or a collapsedcoil or ply for a lined-type hose,or any combination thereof.6.5.6 Additionally,breaking or damaging of the conductors,or an increase of more than 10%of the conductor resistance,is considered to be a failure for current-carrying hoses.7.Hot and Cold Flex Test with Aging7.1 ScopeThis test method covers the determin
