1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2017 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/J1402_201710 SURFACE VEHICLE RECOMMENDED PRACTICE J1402 OCT2017 Issued 1942-01 Revised 2017-10
5、Superseding J1402 AUG2010 Automotive Air Brake Hose and Hose Assemblies RATIONALE Added 1/4 size to note on Table 1 and paragraph 4.2 for field attachable fittings allowed on Type A hose. Removed restatement of Type AIII hose construction in 7.1.6.1. A proof test per 7.1.2 was added to Low Temperatu
6、re Resistance test 7.2.1.2. 1. SCOPE This recommended practice covers minimum requirements for air brake hose assemblies made from reinforced elastomeric hose and suitable fittings for use in automotive air brake systems including flexible connections from frame to axle, tractor to trailer, trailer
7、to trailer and other unshielded air lines with air pressures up to 1 MPa, that are exposed to potential pull or impact. This hose is not to be used where temperatures, external or internal, fall outside the range of -40 to +100 C. 2. REFERENCES 2.1 Applicable Documents The following publications for
8、m a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724
9、-776-4970 (outside USA), www.sae.org. SAE J517 Hydraulic Hose SAE J1401 Road Vehicle - Hydraulic Brake Hose Assemblies for Use with Nonpetroleum-Base Hydraulic Fluids 2.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Te
10、l: 610-832-9585, www.astm.org. ASTM B117 Standard Test Method of Salt Spray (Fog) Testing ASTM D380 Standard Test Methods for Rubber Hose ASTM D413 Test Methods for Rubber Property - Adhesion to Flexible Substrate SAE INTERNATIONAL J1402 OCT2017 Page 2 of 9 3. HOSE CONSTRUCTIONS AND DIMENSIONS There
11、 are four distinct hose constructions used for air brake hose assemblies made from reinforced elastomeric hose. All dimensions are in accordance with Tables 1 and 2. Type A consists of an elastomeric tube, a fiber reinforcement and an elastomeric cover. Type AI consists of an elastomeric tube, a wir
12、e or fiber reinforcement and a fiber braid cover. Type AII consists of an elastomeric tube, a wire or fiber reinforcement and a fiber braid or elastomeric cover. This hose is dimensionally identical to SAE J517 100R5 hose. Type AIII consists of an elastomeric tube, wire or fiber reinforcement and a
13、fiber braid or elastomeric cover. Table 1 - Inside and outside diameters for Type A and AIII hoses All dimensions are in mm, unless otherwise specified. Metric Size Inch Size (Ref) SAE Type A Dash Size (Ref) Type A ID Min Type A ID Max Type A OD Min Type A OD Max SAE Type AIII Dash Size (Ref) Type A
14、III ID Min Type AIII ID Max Type AIII OD Min Type AIII OD Max 6.3 1/4 -4 5.8 6.9 15.1 16.7 -4 6.2 7.0 12.0 14.0 8 5/16 -5 7.3 8.5 16.7 18.3 10 3/8 -6 8.9 10.1 18.3 19.8 -6 9.3 10.1 15.5 17.5 11.5 7/16 -7 10.3 11.9 19.8 21.4 12.5 SP 1/2 SP -8 11.9 13.5 21.4 23.0 12.5 1/2 -8 12.3 13.5 19.0 21.0 16 5/8
15、 -10 15.1 16.7 26.2 27.8 -10 15.5 16.7 22.7 24.7 NOTE: The sizes 1/4, 3/8, 7/16, and 1/2 SP of Type A hose can be assembled with field attachable fittings if desired. These field attachable fittings are not the same as used with Types AI and AII hoses. AIII hoses are assembled with permanent crimp f
16、ittings only. Table 2 - Inside and outside diameters for Type AI and AII hoses All dimensions are in mm, unless otherwise specified. Metric Size Inch Size (Ref) SAE Type AI and AII Dash Size (Ref) Type AI and AII ID Min Type AI and AII ID Max Type AI OD Min Type AI OD Max Type AII OD Min Type AII OD
17、 Max 5 3/16 -4 4.8 5.5 12.0 13.0 12.7 13.7 6.3 1/4 -5 6.4 7.2 13.6 14.6 14.3 15.3 8 5/16 -6 7.9 8.7 15.1 16.2 16.7 17.6 11 13/32 -8 10.3 11.1 18.1 19.3 18.9 20.0 12.5 1/2 -10 12.7 13.7 20.5 21.7 22.8 24.0 16 5/8 -12 15.9 17.0 23.7 24.9 26.8 28.0 SAE INTERNATIONAL J1402 OCT2017 Page 3 of 9 4. FITTING
18、S 4.1 For Permanently Attached Fittings When the hose is assembled with permanently attached fittings, the hose portion of the hose assembly shall conform to the dimensional requirements of Type A or AIII hose in Table 1 and AI or AII hose in Table 2. 4.2 For Field Attachable Fittings When the hose
19、is assembled with field attachable fittings, the hose portion of the hose assembly shall conform to the dimensional requirements for all sizes of Type AI or AII hose in Table 2 or shall conform to the dimensional requirements of 1/4, 3/8, 7/16, and 1/2 SP Type A hose from Table 1. NOTE: The sizes 1/
20、4, 3/8, 7/16, and 1/2 SP of Type A hose can be assembled with field attachable fittings if desired. These field attachable fittings are not the same as used with Types AI and AII hoses. 5. MINIMUM BEND RADIUS Table 3 contains the minimum bend radii recommended for vehicle installations. Table 3 - Re
21、commended minimum bend radius Metric Size Inch Size (Ref) Minimum Bend Radius to Inside of Bend (mm) 5 3/16 50 6.3 1/4 65 8 5/16 75 10 3/8 90 11 13/32 90 11.5 7/16 100 12.5 SP 1/2 SP 100 12.5 1/2 100 16 5/8 115 6. IDENTIFICATION 6.1 Hose Each hose manufacturer shall incorporate into the hose constru
22、ction an identification yarn as assigned by the RMA and as shown in Appendix A, Table A1 of SAE J1401. Each air brake hose shall also be labeled in a color contrasting to that of the hose and labeling shall be repeated every 600 mm or less along the entire length of hose in legible block capital let
23、ters at least 3 mm high with the following minimum information in the order listed: a. The hose manufacturers identification XXXXX b. The words “AIR BRAKE” to identify specific hose application c. The hose metric size, such as Size 8 d. SAE J1402 SAE INTERNATIONAL J1402 OCT2017 Page 4 of 9 Example:
24、XXXXX AIR BRAKE Size 8 SAE J1402 In addition, each air brake hose shall be labeled with either an A, AI, AII, or AIII, identifying whether the hose has been manufactured to the dimensions of A, AI, AII, or AIII hose as shown in Tables 1 and 2. This additional labeling need not appear on the same lay
25、line as the above (a), (b), (c), and (d) information, but shall have the same minimum requirements of color contrast, spacing and letter height. 6.2 Fittings Each field attachable air brake hose fitting shall be permanently etched, embossed, or stamped in legible block capital letters at least 1.5 m
26、m high with the coupling manufacturers identification, hose size and whether they are intended for use with Type A, AI, or AII hose. 6.3 Assemblies Each air brake hose assembly shall be identified by means of a band around the hose. The band may move freely along the length of the assembly as long a
27、s it is retained by the end fitting. The band shall be permanently etched, embossed or stamped in legible block capital letters at least 3 mm high with the following information: a. The month, day and year, or the month and year the assembly was made expressed in numerals. For example, 3/1/75 means
28、March 1, 1975 or 3/75 means March 1975. b. The assemblers identification and additional information, as required. 7. PERFORMANCE NOTE 1: All samples subjected to one or more performance tests other than Proof Pressure and Length Change shall be destroyed and discarded after completion of the tests a
29、nd their analysis. NOTE 2: Burst Strength and Assembly Tensile Strength tests are qualification tests and do not imply that the hose assemblies can be used under those conditions. 7.1 Acceptance Performance Hose or hose assemblies at the time of manufacture shall conform to the following: 7.1.1 End
30、Fittings End fittings shall be such as to permit conformance to all portions of this recommended practice. After assembly of the end fittings to the hose, the minimum ID of the end fittings or the hose shall not be less than 66% of the minimum hose ID shown in Table 1. All hose assemblies shall pass
31、 this requirement prior to conducting any other test in this recommended practice. 7.1.2 Proof Pressure Assemblies subjected to a pressure test using 2 MPa 0.1 MPa air or nitrogen under water for a minimum of 30 seconds shall show no leaks. 7.1.3 Burst Strength There shall be no hose burst, leakage
32、or end fitting separation below 6 MPa when hose or hose assemblies are subjected to a hydrostatic burst test using water. SAE INTERNATIONAL J1402 OCT2017 Page 5 of 9 7.1.4 Assembly Tensile Strength 450 mm long hose assemblies including the fittings shall be subjected to a longitudinal tensile test a
33、t a steady rate of 25 mm/min 2.5 mm/min until separation of the hose from the fittings or rupture of the hose occurs. Failure of the 6.3 mm and smaller size shall occur at no less than 1100 N and larger sizes at no less than 1450 N. 7.1.5 Length Change Test for length change shall be conducted in ac
34、cordance with ASTM D380 (Elongation and Contraction) with the original measurement made at 0.1 MPa. The change in length shall be determined at 1.5 MPa and shall be from +5% to -7%. 7.1.6 Adhesion Tests for adhesion shall be conducted only on original unaged specimens as follows: 7.1.6.1 Adhesion of
35、 Fiber Reinforced Hose Test for adhesion shall be conducted in accordance with ASTM D413 Machine Method, and the average load required to separate any adjacent layers shall be 1.4 N/mm minimum. 7.1.6.2 Adhesion of Wire Reinforced Hose The requirements and method of testing cover adhesion for Type AI
36、, AII, and AIII hoses with wire reinforcement shall be as in 7.1.6.1. The integrity of the inner tube adhesion shall be tested by subjecting a length of hose not less than 380 mm long to the following requirements: Place a steel ball of the size specified in Table 4 in the bore of the hose. One end
37、of the hose shall be attached to a vacuum source and the other end plugged. A vacuum of 17 kPa absolute shall be applied for a period of 5 minutes while the hose is in an essentially straight position. At the conclusion of this period and while still under vacuum, the hose shall be bent 180 to the m
38、inimum bend radius in Table 3 in each of two directions 180 apart. After bending and returning to an essentially straight position and while still under vacuum, the ball shall be rolled from end to end of the hose. Failure of the ball to pass freely from end to end shall be indication of separation
39、of the inner tube from the reinforcement layer and shall constitute failure. Table 4 - Ball size for testing adhesion of wire reinforced hose Metric Size 5 6.3 8 11 12.5 16 Inch Size (Ref) 3/16 1/4 5/16 13/32 1/2 5/8 Ball Size (mm) 3.5 4.5 6.0 7.5 9.5 12.0 SAE INTERNATIONAL J1402 OCT2017 Page 6 of 9
40、 7.2 Qualification Performance For initial qualification under this specification all of the requirements under Acceptance Performance, Qualification Performance, and Flexure Test shall be met. Minimum sampling shall be per Table 5, including the specified sequential test procedure. Table 5 - Minimu
41、m sampling and sequential test procedure Sample No. Subjected to Followed by 1 7.1.1(1) 7.2.1.1 then 7.1.2 2 7.1.1(1) 7.2.1.2 then 7.1.2 3 7.2.2.1 4 7.1.1(1) 7.2.2.2 then 7.1.4 5 7.2.2.3 6 7.1.1(1) 7.2.2.4 then 7.1.3 7 7.1.1(1) 7.1.5 then 7.1.2 and 7.1.3 8 7.1.6 9 7.1.1(1) 8. 1. Couple hose before s
42、tarting tests or aging. 7.2.1 Temperature Resistance 7.2.1.1 High Temperature Resistance The hose portion of a hose assembly shall show no cracks, charring or disintegration externally or internally when straightened after being bent over a form for a period of 70 hours 2 hours while in an air oven
43、at 100 C 2 C. The radius of the test form shall be in accordance with Table 3. The external surface of fiber braid covered hoses shall be exempt from inspection for cracks as visual inspection is not practical. After completion of this test, the hose assembly shall be tested in accordance with 7.1.2
44、. 7.2.1.2 Low Temperature Resistance The hose shall show no cracks externally or internally when bent 180 over a form having the radius shown in Table 3 after hose and form have been exposed for a period of 70 hours 2 hours in an air circulating chamber at -40 C 2 C and while still at this temperatu
45、re. The hose and form shall be supported by a non-metallic surface during the entire period. The bend shall be completed in a period of 3 to 5 seconds. The external surface of fiber braid covered hoses shall be exempt from inspection for cracks as visual inspection is not practical. After completion
46、 of this test, the hose assembly shall be tested in accordance with 7.1.2. 7.2.2 Resistance to Environment 7.2.2.1 Oil Specimens prepared from the inner tube and the cover shall show a volume increase when measured after removal from ASTM IRM 903 oil in which it has been immersed for 70 hours 2 hour
47、s at 100 C 2 C of not more than 100%. 7.2.2.2 Water Condition hose assembly by immersion in distilled water at room temperature for a period of 168 hours 2 hours while bent over a form having the minimum bend radius shown in Table 3. Ends shall be completely capped during immersion. After completion
48、 of this test, the hose assembly shall be tested in accordance with 7.1.4. SAE INTERNATIONAL J1402 OCT2017 Page 7 of 9 7.2.2.3 Ozone After being exposed for 70 hours 2 hours in an ozone test cabinet with an atmosphere comprised of air and ozone with an ozone partial pressure of 100 mPa (100 parts of
49、 ozone per 100 million parts of air) at standard atmospheric conditions at an ambient temperature of 40 C 2 C and while bent over a form having the radius shown in Table 3, the hose shall show no cracking under 7X magnification. This test only applies to elastomeric covered hoses. 7.2.2.4 Salt Spray Test A hose assembly, while supported or suspende
