ASTM D622-1999(2005) Standard Test Methods for Rubber Hose for Automotive Air and Vacuum Brake System《汽车空气制动和真空制动用橡胶软管的试验方法》.pdf

《ASTM D622-1999(2005) Standard Test Methods for Rubber Hose for Automotive Air and Vacuum Brake System《汽车空气制动和真空制动用橡胶软管的试验方法》.pdf》由会员分享，可在线阅读，更多相关《ASTM D622-1999(2005) Standard Test Methods for Rubber Hose for Automotive Air and Vacuum Brake System《汽车空气制动和真空制动用橡胶软管的试验方法》.pdf（5页珍藏版）》请在麦多课文档分享上搜索。

1、Designation: D 622 99 (Reapproved 2005)Standard Test Methods forRubber Hose for Automotive Air and Vacuum Brake System1This standard is issued under the fixed designation D 622; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y

2、ear 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.This standard has been approved for use by agencies of the Department of Defense. These test methods were prepared jointly

3、 by theSociety of Automotive Engineers and the American Society for Testing and Materials.1. Scope1.1 These test methods are intended for use in testing theconventional types of hose employed for the operation of airbrake and vacuum brake systems,2either on a single motorvehicle or as connecting or

4、transmission lines in a combinationof vehicles. The hose may be assembled with suitable metalcouplings or may be as fabricated for use with detachablefittings. The term “rubber” as used in these test methodsincludes synthetic compounds as well as compounds of naturalrubber.1.2 The values stated in S

5、I units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety problems, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and healt

6、h practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3D 380 Test Methods for Rubber HoseD 413 Test Methods for Rubber PropertyAdhesion toFlexible SubstrateD 471 Test Method for Rubber PropertyEffect of LiquidsD 573 Test Method

7、for RubberDeterioration in an AirOvenD 1149 Test Method for Rubber DeteriorationSurfaceOzone Cracking in a ChamberD 2240 Test Method for Rubber PropertyDurometerHardnessE4 Practices for Force Verification of Testing Machines2.2 SAE Standards:2J1402 Automotive Air Brake Hose and Hose AssembliesJ1403

8、Vacuum Brake Hose3. Significance and Use3.1 The purpose of these test methods are to providenationally recognized test methods for air brake and vacuumbrake hose, in particular the hose specifications SAE J1402 andSAE J1403, and to provide producers, distributors, and userswith a basis for evaluatin

9、g the characteristics of these hoseproducts.4. General Methods4.1 The special tests described in these test methods shall beapplied as required in order to comply with the detailedspecifications for these types of hose. Otherwise, the generalmethods in Test Methods D 380 shall be used and are hereby

10、made a part of these test methods.4.2 In case of a conflict between the provisions of thesegeneral test methods and those of detailed specifications or testmethods for a particular hose, the latter shall take precedence.5. Sampling5.1 One representative sample of each lot to be tested shallbe taken.

11、 The total length of hose required for all tests is asfollows:Air brake hose approximately3m(9ft)Vacuum brake hose approximately5m(15ft)5.2 Each test specimen shall be prepared from the originalsample without having been subjected to any previous test.5.3 In the interest of safety, any hose remainin

12、g intact afterthese tests shall be destroyed.1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and are the direct responsibility of Subcommittee D11.31 on Rubber Hoseand Belting.Current edition approved May 1, 2005. Published May 2005. Originallyapproved in 1941. Last pre

13、vious edition approved in 1999 as D 622 99.2For specifications covering hose of these types, reference should be made to theAir Brake Hose (SAE J1402) and for Vacuum Brake Hose (SAE J1403)oftheSociety of Automotive Engineers, SAE Handbook. Available from Society ofAutomotive Engineers (SAE), 400 Com

14、monwealth Dr., Warrendale, PA 15096-0001.3For 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.1Copyright ASTM Inte

15、rnational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Test Conditions6.1 The temperature of the testing room shall be maintainedat 23 6 5C (73 6 9F). The temperature of the test samplesshall be stabilized at the testing room temperature prior totesting.TES

16、TS APPLICABLE TO BOTH AIR BRAKE ANDVACUUM BRAKE HOSE7. Hydrostatic Bursting Test7.1 Conduct the hydrostatic bursting test in accordance withTest Methods D 380.8. Adhesion Test8.1 Fiber Reinforced HoseConduct the adhesion testbetween component parts of fiber reinforced hose in accor-dance with Test M

17、ethods D 413, Machine Method.8.2 Wire Reinforced HoseConduct the adhesion test onspecimens with a minimum length of 380 mm (15 in.) preparedfrom the original sample without having been subject toprevious tests.8.2.1 ProcedurePlace a steel ball of the size specified inTable 1 in the bore of the hose.

18、 Completely close one endagainst air leakage and connect the other end to a vacuumpump. Subject the bore of the hose to a reduced pressure(vacuum) of 85 kPa (25 in. Hg) for a period of 5 min while inan essentially straight position. At the end of this period andwhile still under the reduced pressure

19、, bend the hose 3.14 rad(180) to the minimum radius specified in Table 2 in each oftwo directions 3.14 rad (180) apart.8.2.1.1 After bending and returning to an essentially straightposition and while still under reduced pressure, the ball shall berolled from end to end of the hose. Failure of the ba

20、ll to passfreely from end to end shall be an indication of separation ofthe tube from the carcass due to inadequate adhesion. Reportany separation.9. Ozone Resistance Test9.1 Bend a specimen of hose of full circumference around amandrel and tie the ends together where they cross one anotherwith tie

21、wire. The mandrel shall be a diameter twice theminimum bend radius specified in Table 2 for air brake hoseand 8 times the nominal outside diameter for vacuum brakehose. The specimen length shall be about 250 mm (10 in.)longer than the mandrel circumference. Seal the ends of thehose with plugs on cap

22、s in such a manner that the reinforce-ment and inner tube will not be exposed to ozone.9.2 Condition the hose for 24 612 h in air at roomtemperature and while still on the mandrel place in an exposurechamber in accordance with Test Method D 1149, containingair mixed with ozone, with ozone at a parti

23、al pressure of 50 65 mPa (formerly expressed as pphm, see Test Method D 1149for explanation). The ambient air temperature in the chamberduring the test shall be 40 6 2C (104 6 3.6F). Expose thespecimen to the ozone and air mixture for a period of 70 6 2h. To determine conformance to this requirement

24、, examine thecover of the specimen under 73 magnification, ignoring areasimmediately adjacent to or within the area covered by the tiewire.9.3 Report any cracks.10. Oil Immersion Test10.1 When required by the detailed specification, determinethe changes in volume, tensile strength, ultimate elongati

25、on,and hardness of the tube and cover in accordance with TestMethod D 471, using IRM 903 oil4at a temperature of 100 62C (212 6 3.6F) and an immersion period of 70 6 2h.Prepare the test specimen from samples taken from the hose.They shall be as near the size specified in Test Method D 471as can be o

26、btained from the hose being tested.TESTS APPLICABLE TO AIR BRAKE HOSE11. Proof Pressure Test11.1 Assemble a specimen of hose 450 mm (18 in.) inlength, with service couplings and connect to a source of air ornitrogen pressure. Submerge the hose and couplings entirely inwater such that visual observat

27、ion of the assembly is permitted,apply an internal pressure of 2070 6 70 kPa (300 6 10 psi) andmaintain for 5 min. Report any evidence of leakage from thehose or couplings. Initial appearance of bubbles may beindications of air entrapped in hose wall. Agitate the hose after2 min to break air bubbles

28、 from surface. Following this, apersistent stream of bubbles from any location shall beconsidered failure to meet test.12. Assembly Tension Test12.1 ApparatusA tension testing machine conforming tothe requirements of Practices E4 and provided with anindicating device to give the total force in newto

29、ns (orpounds-force) at the conclusion of the test.12.2 Assemble a specimen of hose 450 mm (18 in.) inlength, with service couplings. Hold the assembly in the testingmachine so that the hose and couplings will have a straightcenter line corresponding to the direction of the machine pull.Apply a stead

30、y tension force to the hose assembly at a speedsuch that the moving head travels at the rate of 0.4 6 0.04mm/s (1.0 6 0.1 in./min) until failure occurs, either by4IRM 903 oil is described in Test Method D 471.TABLE 1 Ball Size for Testing Adhesion of Wire Reinforced HoseHoseInside mm 4.8 6.4 7.9 9.5

31、 10.3 11.1 12.7 15.9Diameter in.316145163813327161258Ball mm 3.6 4.8 6.0 7.1 7.5 8.3 9.5 11.9Size in.964316156493219642164381532D 622 99 (2005)2separation of the hose from the couplings or by rupture of thehose structure. Report force to cause failure and the type offailure.13. Length Change13.1 Lay

32、 out the hose in a straight, horizontal position withone end connected to a source of hydrostatic pressure such asa hand- or power-driven hydraulic pump and the other endplugged or capped. Apply a pressure of 70 kPa (10 psi) andmeasure the original length between bench marks placed on thehose or the

33、 hose “free length” between the couplings. Thenincrease the pressure to 1400 kPa (200 psi) without releasingthe original pressure of 70 kPa (10 psi) and make a final lengthmeasurement within 1 min. Report an increase in the finallength from the original length as elongation, and report adecrease in

34、final length from the original length as contraction.Calculate the percent change in length as follows:% Change 5final length 2 original length!3100original length(1)( + %) change = elongation( %) change = contraction14. High-Temperature Resistance Test14.1 Bend a specimen of hose around a form of t

35、hedimensions specified in Table 3 and hold in place by a band orcord (see Fig. 1). Place the assembly, for a period of 70 6 2hat a temperature of 100 6 2C (212 6 3.6F), in an air ovenconforming to that described in Test Method D 573. Afterremoval from the oven, allow the hose to cool to roomtemperat

36、ure and then remove from the form. Open the hose outto a straight length as shown in Fig. 2 and examine externallyfor cracks and disintegration. Cut the hose lengthwise andexamine the inner tube for signs of cracking.14.2 Report any cracks.15. Low-Temperature Resistance Test15.1 Condition the hose i

37、n a cold box in a straight positionat 40 6 2C (40 6 3.6F) for 70 6 2 h. After conditioningand without removal from the cold box, bend the hose 180 in3 to 5 s around a form having the radius specified in Table 2.Examine externally for cracks. Cut the hose lengthwise andexamine the inner tube for sign

38、s of cracking.15.2 Report any cracks.TESTS APPLICABLE TO VACUUM BRAKE HOSE16. Aged Adhesion16.1 Fill a hose 300 mm (12 in.) in length with ReferenceFuel B5enclosed by means of suitable plugs or caps to preventloss by evaporation or leakage.Allow the filled hose to stand atroom temperature for 48 h.1

39、6.2 After conditioning, drain the Reference Fuel B fromthe hose and conduct the adhesion test between componentparts of fiber reinforced hose in accordance with Test MethodsD 413, Machine Method.17. Aging Test17.1 Bend a specimen of hose around a form of thedimensions specified in Table 4 and hold i

40、n place by a band orcord (see Fig. 1). Place the assembly for a period of 70 6 2hat a temperature of 100 6 1C (212 6 1.8F) in an air ovenconforming to that described in Test Method D 573. Afterremoval from the oven, allow hose to cool to room temperatureand then remove from the form. Open the hose o

41、ut to a straightlength, as shown in Fig. 2, and examine externally for cracksand disintegration.17.2 Subject the hose to a hydrostatic proof pressure asspecified by the detailed specification.17.3 Cut the hose lengthwise and examine the inner tube forsigns of cracking.17.4 Report any cracks external

42、ly and in the inner tube.18. Cold Test18.1 Condition the hose in a cold box in a straight positionat 40 6 2C (40 6 3.6F) for 70 6 2 h. After conditioningand without removal from the cold box, bend the hose 180 in3 to 5 s around a mandrel having a diameter ten times thenominal outside diameter of the

43、 hose. Examine externally forcracking or breaking.18.2 Subject the hose to a hydrostatic proof pressure asspecified by the detailed specification.18.3 Cut the hose lengthwise and examine the inner tube forsigns of cracking and breaking.18.4 Report any cracks externally and in the inner tube.19. Coll

44、apse Resistance (Vacuum) Test19.1 Assemble a hose specimen 300 mm (12 in.) in lengthwith suitable end fittings such that one end may be completely5Reference Fuel B is described in Test Method D 471.TABLE 2 Minimum Bend RadiusHoseInsideDiametermm 4.8 6.4 7.9 9.5 10.3 11.1 12.7 15.9in.3161451638133271

45、61258MinimumBendRadiusmm 51 64 76 89 89 102 102 114in. 2 212 3312 312 4412AMinimum bend radius is measured to the inside of the bend .D 622 99 (2005)3closed against air leakage and the other end connected to avacuum pump. Measure the outside diameter of the testspecimen. Subject the bore of the hose

46、 to a reduced pressure(vacuum) of 88 kPa (26 in. Hg) for a period of 5 min. Connecta suitable manometer or vacuum gage in the system to indicatethe degree of reduced pressure actually maintained. At the endof the 5-min period, while the hose is still under reducedpressure, again measure the outside

47、diameter of the testspecimen so as to determine the minimum diameter at anycross section. Make the measurement with calipers graduatedto a maximum of 1 mm (or132 in.). The difference between thismeasurement and the original outside diameter shall be con-sidered the collapse of the hose outside diame

48、ter under reducedpressure.20. Bend Test20.1 Bend a hose specimen of the length prescribed in Table5, in the direction of its normal curvature until its ends justtouch as shown in Fig. 3. Measure the outside diameter of thespecimen at the middle section A in the plane of the center linebefore and aft

49、er bending, using calipers graduated to a maxi-mum of 1 mm (or132 in.). The difference between the twomeasurements shall be considered the collapse of the hoseoutside diameter on bending.21. Fuel Immersion Tests21.1 Conduct the immersion tests on tube material todetermine the changes in tensile strength, ultimate elongation,and volume in accordance with Test Methods D 380 usingReference Fuel B5for 48 6 0.5 h at room temperature.22. Oven Aging Test22.1 Conduct physical property tests to determine thechanges in tensile s