1、Designation: F450 09An 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 revis
2、ion, the 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 c
3、leaner andextractor hoses will receive in normal use.1.2 These test methods apply to plastic (regular and rein-forced), nonelectric vacuum cleaner and extractor hoses forhousehold use.1.3 The following tests are included:SectionTorsional flex 6Hot and cold flex with aging 7Abrasion, external surface
4、s 8Flex 9Pull test on hose fittings with aging 10Crush 11Stretch ratio 12Extractor hoses 131.4 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 m
5、athematicalconversions to SI units 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
6、 health practices and determine the 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 Me
7、thods for Vacuum Cleaner HoseDurabilityand Reliability (All-Plastic Hose)3. 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
8、.5. Sampling5.1 The sample 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 ofthe adhesion of the reinforcement wire coating to the hosejacket, the jacke
9、t strength, and the strength of the reinforce-ment wire for plastic hose with inside diameter from 1 to 2 in.(25 to 51 mm).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, b
10、oth clockwise and counter-clockwise.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 diame
11、ter ofhose with 0.078 in. (2.0 mm) 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.6.3 Test SpecimenThe specimen shall be a length of hose24 6 1 in.
12、 (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.1These methods are under the jurisdiction of ASTM Committee F11 on VacuumCleaners and are the direct responsibility of Subcommittee F11.30 on D
13、urability-Reliability.Current edition approved Oct. 1, 2009. Published November 2009. Originallyapproved in 1979. Last previous edition approved in 2005 as F450 01 (2005).DOI: 10.1520/F0450-09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at se
14、rviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.5 Procedure:6.5.1 Conduct the tests at 68 to 81F (2
15、0 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 counter-clockwise at
16、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.7. Hot and Cold Flex Test with Aging7.1 ScopeThis test method cov
17、ers the determination ofthe effect of temperature and flexing upon a hose sample withinside diameters from 1 to 2 in. (25 to 51 cm).7.2 Apparatus:7.2.1 Air-Circulating Oven or Environmental Chamber,tomaintain 156F (69C) controlled to 62F (61C).7.2.2 Cold BoxAcold box able to maintain 20F (6.7C)contr
18、olled to 61F (60.5C).7.3 Test SpecimenThe specimen shall be a length of hosein which the length in inches or millimetres shall be determinedas follows:11.2 3 inside diameter, in inches 1 2 in.11.2 3 inside diameter, in millimetres 1 51 mm!7.4 ConditioningCondition the specimens at an ambienttemperat
19、ure of 68 to 81F (20 to 27C) for not less than 1 hprior to test.7.5 Procedure:7.5.1 Bend a specimen in a “U” shape and tie the endstogether at a position 1 in. (25 mm) from the ends as shown inFig. 2.7.5.2 Place the specimen into the oven, which has beenbrought to a steady test temperature of 156 6
20、2F (69 6 1C),and soak the sample for 2012 h.7.5.3 Remove the specimen from the oven and allow 30 minfor samples to come to ambient temperature in accordance with7.4.7.5.4 Next, place the specimen in the cold box, which hasbeen brought to a steady temperature of 20 6 1F (6.7 60.5C) for 2 h.7.5.5 Remo
21、ve the specimen from the cold box, untie andimmediately flex it 360, three times, 1 s per flex, as shown inFig. 3.7.5.6 Failure may be evidenced by a tear or hole thatpenetrates the hose jacket to cause air leak, or a collapsed coilor ply for a lined-type hose, or any combination thereof.Reinforceme
22、nt wires that pull away or holes worn in outerjacket that do not cause air leaks are not determined to befailures.7.5.7 Retie the hose in its original position.7.5.8 Allow 1 h for conditioning as specified in 7.4 beforestarting next cycle.7.5.9 The steps covered in 7.5.1-7.5.8 constitute one cycle.C
23、onduct this complete cycle of tests for four successive days,then permit the specimens to remain at ambient conditions forthe unused balance of a 7-day period, then repeat until a failureoccurs or until a specified end point is reached, whicheveroccurs first.7.6 ReportThe report shall include the fo
24、llowing:7.6.1 Number of cycles to failure or to a specified end point,whichever occurs first,7.6.2 Condition of the specimen,7.6.3 Ambient test temperature,7.6.4 Description of specimen, and7.6.5 Number of specimens tested.FIG. 1 Schematic for Torsional Flex TestFIG. 2 Hose Position During Heat and
25、Cold SoakF450 0928. Abrasion Test of External Surface8.1 ScopeThis test method measures the wear character-istics of a vacuum cleaner hose subjected to an abrasivesurface.8.2 Apparatus:8.2.1 Special Abrasion Test Fixture, as described in Fig. 4 toproduce a rate of 20 6 1 cycles/min.8.2.2 Cylindrical
26、 Segment, as described in Fig. 5.8.2.3 Test Weight,166 1 oz (454 6 3 g) with provision toattach to the specimen.8.2.4 Abrasive Paper, wet-dry, 500-grit, for abrasion testsurface.38.2.5 Instrument, to measure cycles to failure or to aspecified end point.8.2.6 Weight Guide, to prevent weight from swin
27、ging duringtest cycling.8.2.7 Clamps, suitable for attaching the hose to the mecha-nism coupling on one end and attaching the weight to the otherend without causing failure of the hose at these clamps.8.3 Test SpecimenThe specimen shall be a full lengthhose, or a length of hose suitable for the test
28、 unit.8.4 ConditioningCondition the specimen at 68 to 81F(20 to 27C) ambient temperature for not less than 1 h prior totest.8.5 Procedure:8.5.1 Conduct the tests at 68 to 81F (20 to 27C).8.5.2 Clamp a new sheet of standard wet-dry, 500-gritabrasive paper to the cylinder.8.5.3 Clamp the specimen to t
29、he mechanism coupling.Attach the weight and place in the weight guide. The weightshall be in free suspension throughout the cycle.8.5.4 Set the measuring instrument to zero or record startingvalue.8.5.5 Cycle the specimen against the surface of the abrasivepaper until failure of jacket or to a speci
30、fied end point.8.5.6 Failure may be evidenced by a tear or hole thatpenetrates the hose jacket to cause air leak, or a collapsed coilor ply for a lined-type hose, or any combination thereof.Reinforcement wires that pull away or holes worn in outerjacket that do not cause air leaks are not determined
31、 to befailures.8.6 ReportThe report shall include the following:8.6.1 Number of cycles to failure or to a specified end point,whichever occurs first,8.6.2 Description of failure,8.6.3 Ambient test temperature,8.6.4 Description of specimen, and8.6.5 Number of pieces tested.9. Flex Test9.1 ScopeThis t
32、est method covers the determination ofthe vacuum cleaner hose resistance to bending under an appliedstress.9.2 Apparatus:9.2.1 Special Abrasion Test Fixture, as described in 8.2.1and Fig. 4 except with driving arm rotating at 36 6 1cycles/min and the cylindrical segment replaced with pulley(9.2.2).9
33、.2.2 Pulley, a cold-rolled steel (or similar) grooved pulleyas described in Fig. 6.9.2.3 Test Weight, 160 6 1 oz (4536 6 28 g) for reinforcedhoses and 80 6 1 oz (2268 6 28 g) for plastic hoses withprovision for attaching to the specimen.9.2.4 Weight Guide, to prevent weight from swinging duringtest
34、cycling.9.2.5 Instrument, to measure cycles to failure or to aspecified end point.9.2.6 Clamps, suitable for attaching the hose to the mecha-nism coupling on one end and attaching the weight to the otherend without causing failure of the hose at these clamps.9.3 Test SpecimenThe specimen shall be a
35、full lengthhose, or a length of hose suitable for the test unit.9.4 ConditioningCondition the specimen at 68 to 81F(20 to 27C) ambient temperature for not less than 1 h prior totest.9.5 Procedure:9.5.1 Conduct tests at 68 to 81F (20 to 27C).9.5.2 Clamp the specimen to the mechanism coupling.Attach t
36、he weight and place in weight guide. The weight shallbe in free suspension throughout the cycle.9.5.3 Set the measuring instrument to zero or record thestarting value.9.5.4 Run the test until failure or until a specified end pointis reached, whichever occurs first.9.5.5 Failure may be evidenced by a
37、 tear or hole thatpenetrates the hose jacket to cause air leak, or a collapsed coilor ply for a lined-type hose, or any combination thereof.Reinforcement wires that pull away or holes worn in outerjacket that do not cause air leaks are not determined to befailures.9.6 ReportThe report shall include
38、the following:9.6.1 Number of cycles to failure or specified end point,whichever occurs first,9.6.2 Type of failure,9.6.3 Ambient test temperature,9.6.4 Description of specimen, and9.6.5 Number of pieces tested.10. Pull Test on Hose Fittings with Aging10.1 ScopeThis test method covers the determinat
39、ion ofthe ability of the vacuum cleaner hose fitting connection towithstand maximum forces during use.10.2 Apparatus:3Wet-dry, 500-grit, Tri-M-Ite Abrasive Paper, available from 3M Co., St. Paul,MN, has been found suitable for this purpose.FIG. 3 Hose Flex CycleF450 09310.2.1 Oven and Cold Box, as s
40、pecified in 7.2,10.2.2 Total Test Weight,in806 0.5-oz (2268 6 14-g)increments.10.2.3 Testing Machine (alternative to the dead weight)Aproperly calibrated machine of the constant-rate-of crossheadmovement type meeting the requirements of Test Method D638(see 10.5.3 for tension method).10.3 Test Speci
41、menThe test specimen shall be a 1-ft(0.3-m) long section from each end of the hose containing thecleaner attachment fittings, or the hose fittings, or both. ItsFIG. 4 Abrasion and Flex Test Fixture (Abrasion Set Up Shown)FIG. 5 Cylindrical Segment (Abrasion Test)FIG. 6 Pulley Flex Test FixtureF450 0
42、94length shall conform to the requirements of 10.5.3.1 if thetensile machine test method is used.10.4 ConditioningPrior to test on fittings, age the speci-mens by performing the following heat/cold soak.10.4.1 Place the specimen, in straight configuration, in anair-circulating oven at 156 6 2F (69 6
43、 1C) for 2012 h.10.4.2 Remove the specimen from the oven and allow 30min for the specimens to come to equilibrium with ambienttemperature 68 to 81F (20 to 27C).10.4.3 Place the specimen in cold box at 20 6 1F (6.7 60.5C) for 2 h.10.4.4 Remove the specimens from the cold box and allow1 h for them to
44、return to ambient temperature before conduct-ing the pull test.10.5 Procedure:10.5.1 Conduct the tests at ambient temperature of 68 to81F (20 to 27C).10.5.2 Dead Weight Method:10.5.2.1 Clamp the fitting of the specimen to the deadweight.10.5.2.2 Holding the hose, lift the weight slowly. Hold offthe
45、floor for 1 min.10.5.2.3 With dead weight hold 1 min, otherwise pull untilfailure with increasing load on the fitting in 80-oz (2268-g)increments.10.5.2.4 Test both ends.10.5.3 Tension Testing Machine Method:10.5.3.1 Select a specimen length short enough so that theend treatment is pulled off before
46、 the hose stretches the entiredistance of travel of the instrument.10.5.3.2 Fasten both ends of the hose firmly in the machine.10.5.3.3 Stretch the sample at the rate of 0.50 6 0.2 in.(12.7 6 6.1 mm)/min until the hose pulls away from the fitting.Note the force applied.10.5.3.4 Repeat the test with
47、slightly decreasing amounts offorce until the greatest force applied to the sample for 1 minwithout pulling the fitting from the hose is reached. Note thisvalue.10.5.3.5 If the hose failure occurs before either the fitting orfitting to hose bond, report as hose failure and note the loadapplied.10.6
48、ReportThe report shall include the following:10.6.1 Maximum weight or load supported without failure,10.6.2 Location of failure,10.6.3 Ambient test temperature,10.6.4 Hose and fitting description, and10.6.5 Number of specimens tested.11. Crush Test (Relaxed and Stretched)11.1 ScopeThis test method c
49、overs the determination ofthe resistance to crushing of the hose.11.2 Apparatus:11.2.1 Total Dead Weight, in convenient weight incrementsto apply a steady, non-impact compression force.11.2.2 Testing Machine (alternative for the deadweight)A properly calibrated compression testing machineof the constant-rate-of-crosshead movement type meeting therequirements of Test Method D695.11.2.3 Loading PlatesThe load shall be applied to thespecimen through a 212 in. (63.5 mm) wide plate with 0.062-in.(1.6-mm) radius ed
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