1、Designation: F 450 01 (Reapproved 2005)An American National StandardStandard Test Methods forVacuum Cleaner HoseDurability and Reliability (PlasticWire Reinforced)1This standard is issued under the fixed designation F 450; the number immediately following the designation indicates the year oforigina
2、l adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 These test methods cover the determination of the effectof antici
3、pated stresses and strains that vacuum cleaner hoseswill receive in normal use.1.2 These test methods apply to plastic, wire-reinforced,nonelectric vacuum cleaner hoses for household use.1.3 The following tests are included:SectionTorsional flex 6Hot and cold flex with aging 7Abrasion, external surf
4、aces 8Flex 9Pull test on hose fittings with aging 10Crush 111.4 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 un
5、its, which are provided for informationonly and 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 determi
6、ne the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 638 Test Method for Tensile Properties of PlasticsD 695 Test Method for Compressive Properties of RigidPlasticsF 395 Terminology Relating to Vacuum Cleaners3. Terminology3.1 Definitions:3.1.1 Re
7、fer to Terminology F 395.4. 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 sample size shall be one that is mutually agreedupon between the hose manufacturer
8、and the vacuum cleanermanufacturer.TEST METHODS6. Torsional Flex Test6.1 ScopeThis test method covers the determination ofthe adhesion of the reinforcing wire coating to the hose jacket,the jacket strength, and the strength of the reinforcing wire forplastic hose with inside diameter from 1 to 2 in.
9、 (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, both clockwise and counter-clockwise.6.2.2 Test weight of 48 6 1 oz. (1360 6 28 g) withprovision to attach to
10、 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) radius at the ends of the mandrel(see Fig. 1).6.2.5 Guide for weight to
11、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 responsibility of Subcommittee F11.30 on Durability-Reliability.Current
12、 edition approved Nov. 1, 2005. Published December 2005. Originallyapproved in 1979. Last previous edition approved in 2001 as F 450 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume in
13、formation, 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.6.3 Test SpecimenThe specimen shall be a length of hose24 6 1 in. (610 6 25 mm) without fittings.6.4 Condition
14、ingCondition 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 tests 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
15、 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 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 pene
16、trates the hose jacket, or a collapsedcoil or ply for a lined-type hose, or any combination thereof.6.6 ReportThe report shall include the following:6.6.1 Number of cycles to failure or to a specified end point,whichever occurs first,6.6.2 Type of failure,6.6.3 Ambient temperature,6.6.4 Description
17、of specimen, and6.6.5 Number of specimens tested.7. Hot and Cold Flex Test with Aging7.1 ScopeThis test method covers 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 Environmen
18、tal Chamber,tomaintain 156F (69C) controlled to 62F (61C).7.2.2 Cold BoxAcold box able to maintain 20F (6.7C)controlled 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
19、 2 in.11.2 3 inside diameter, in millimetres 1 51 mm!7.4 ConditioningCondition the specimens at an ambienttemperature 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 s
20、hown inFig. 2.7.5.2 Place the specimen into the oven, which has beenbrought to a steady test temperature of 156 6 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 equilibrium with the ambient tempera-ture in accordance with 7.
21、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 Remove the specimen from the cold box, untie andimmediately flex it 360, three times, 1 s per flex, as shown inFig. 3.7.5.6 Examine the specimen for failure. Failure m
22、ay beevidenced by a broken reinforcing wire, tear, or hole thatpenetrates the hose jacket, or a collapsed coil or ply for alined-type hose, or any combination thereof.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 Th
23、e steps covered in 7.5.1-7.5.8 constitute one cycle.Conduct 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, whichevero
24、ccurs first.7.6 ReportThe report shall include the following: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 Tor
25、sional Flex TestF 450 01 (2005)28. Abrasion Test of External Surface (Optional)8.1 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 cy
26、cles/min.8.2.2 Cylindrical 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, t
27、o prevent weight from swinging 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
28、hose suitable for the test 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
29、.3 Clamp the specimen to the 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 failu
30、re of jacket or to a specified end point.8.5.6 Failure is hole in jacket.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, an
31、d8.6.5 Number of pieces tested.9. Flex Test9.1 ScopeThis test 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
32、 and the cylindrical segment replaced with pulley(9.2.2).9.2.2 Pulley, a cold-rolled steel grooved pulley as describedin Fig. 6.9.2.3 Test Weight, 160 6 1 oz (4536 6 28 g) with provisionfor attaching to the specimen.9.2.4 Weight Guide, to prevent weight from swinging duringtest cycling.9.2.5 Instrum
33、ent, 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 full lengthhose, or a
34、 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 the weight and place i
35、n 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 broken reinforcingwi
36、re, tear, or hole that penetrates the hose jacket, or a collapsedcoil or ply for a lined-type hose, or any combination thereof.9.6 ReportThe report shall include 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 tem
37、perature,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 determination ofthe ability of the vacuum cleaner hose fitting connection towithstand maximum forces during use.10.2 Apparatus:3Wet-dry, 500-grit, T
38、ri-M-Ite Abrasive Paper, available from 3M Co., St. Paul,MN, has been found suitable for this purpose.FIG. 2 Hose Position During Heat and Cold SoakFIG. 3 Hose Flex CycleF 450 01 (2005)310.2.1 Oven and Cold Box, as specified in 7.2,10.2.2 Total Test Weight,in806 0.5-oz (2268 6 14-g)increments.10.2.3
39、 Testing Machine (alternative to the dead weight)Aproperly calibrated machine of the constant-rate-of crossheadmovement type meeting the requirements of Test MethodD 638 (see 10.5.3 for tension method).10.3 Test SpecimenThe test specimen shall be a 1-ft(0.3-m) long section from each end of the hose
40、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 FixtureF 450 01 (2005)4length shall conform to the requirements of 10.5.3.1 if thetensile machin
41、e 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 1C) for 2012 h.10.4.2 Remove the specimen from the oven and allow 30min fo
42、r 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 return to ambient temperature before conduct-ing the pull test.10.5 Procedu
43、re: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 floor for 1 min.10.5.2.3 Continue increasing load on the fitting in 80-oz(2
44、268-g) increments until failure or until specified load isreached.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 the hose stretches the entiredistance of travel of the instrument.10.5.3.2 Fast
45、en 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 slightly decreasing amounts offorce until the greatest force applied to the samp
46、le 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 ReportThe report shall include the following:10.6.1 Maximum weight or load suppo
47、rted 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 Test11.1 ScopeThis test method covers the determination ofthe resistance to crushing of the hose.11.2 Apparatus:11.2.1 Total Dead Weight
48、, in convenient weight incrementsto apply a steady, nonimpact 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 D 695.11.2.3 Loading PlatesTh
49、e load shall be applied to thespecimen through a 212 in. (63.5 mm) wide plate with 0.062-in.(1.6-mm) radiused edges. Thickness of the plate shall not beless than 0.50 in. (12.7 mm).11.3 Test SpecimenThe specimen shall be a minimumlength hose of 8 in. (203 mm) with force applied in the centerof the specimen.11.4 ConditioningCondition the specimen at 68 to 81F(20 to 27C) prior to test for not less than 1 h.11.5 Procedure:11.5.1 Conduct tests at 68 to 81F (20 to 27C).11.5.2 Measure the outside diameter of th
