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 2016 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:/www.sae.org/technical/standards/J1231_201608 SURFACE VEHICLE STANDARD J1231 AUG2016 Issued 1978-05 Revised 2016-0
5、8 Superseding J1231 MAY2011 Formed Tube Ends for Hose Connections and Hose FittingsRATIONALE General revision and update to SAE J1231 to correct Table 3. x Deleted “D” internal diameter dimensions in Table 3, for sizes -40 thorugh -80. x Added footnote 2 to Table 3. 1. SCOPE This SAE Standard provid
6、es general and dimensional specifications for formed tube ends and hose fittings. These connections are intended for general applications in low pressure automotive and hydraulic systems on automotive, industrial, and commercial products. The fittings shown in Figures 2 and 3 are intended to be reta
7、ined by hose clamps as specified in SAE J1508. It is recommended that where step sizes or additional types of fittings are required, they be designed to conform with the specifications of this document insofar as they may apply. The following general specifications shall supplement the dimensional d
8、ata contained in the tables with respect to all unspecified detail. 2. REFERENCES 2.1 Applicable Documents The following publications form 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
9、 Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J476a Dryseal Pipe Threads SAE J512 Automotive Tube Fittings SAE INTERNATIONAL J1231 AUG2016 Page 2 of 14 SAE J846 Coding Sy
10、stems for Identification of Fluid Conductors and Connectors SAE J1508 Hose Clamp Specifications SAE J1926-3 Connections for General Use and Fluid Power - Ports and Stud Ends with ASME B1.1 Threads and O-Ring Sealing - Part 3: Light-Duty (L-Series) Stud Ends 2.1.2 ASTM Publications Available from AST
11、M International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org ASTM B 117 Method of Salt Spray (Fog) Testing 2.1.3 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-6
12、42-4900, www.ansi.org. ISO 4759-1 Tolerances for Fasteners - Part 1 2.1.4 ASME Publications Available from American Society of Mechanical Engineers, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, Tel: 973-882-1170, www.asme.org. ASME B1.1 Unified Screw Threads ASME B1.20.1 General Purpose Pi
13、pe Threads 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside US
14、A and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J516 Hydraulic Hose Fittings SAE J1273 Recommended Practices for Hydraulic Hose Assemblies SAE J514 Hydraulic Tube Fittings SAE INTERNATIONAL J1231 AUG2016 Page 3 of 14 3. SIZE DESIGNATIONS The hose fitting size is designated in accordanc
15、e with SAE J846 as follows: 3.1 The hose dash size is equivalent to the number of sixteenth inch increments in the hose inside diameter. 3.2 The pipe thread dash size is the number of sixteenth inch increments in the nominal pipe thread size. 3.3 The O-ring boss thread dash sizes correspond to the n
16、umber of sixteenth inch increments in the outside diameter of the tubing with which they are designed to be used. 4. DIMENSIONS AND TOLERANCES Tabulated dimensions shall apply to the finished parts, plated or otherwise processed, as specified by the purchaser. Details of internal construction of fit
17、tings are not specified and shall be optional with the manufacturer. 4.1 Hex Tolerances Across Flats Hex tolerances across flats shall be according to ISO 4759-1 product grade C. Minimum across corner hex dimensions are 1.092 times the nominal width across flats. The minimum side flat is 0.43 times
18、the nominal width across flats. See Figure 1. Figure 1 - Hex details Except for nominal sizes and thread specifications, dimensions and tolerances are given in SI units. Tolerance on all dimensions not otherwise limited shall be 0.25 mm. Angular tolerance on axis of ends on elbows shall be 2.50 degr
19、ees for sizes up to and including 9.52 mm and 1.50 degrees for sizes larger than 9.52 mm. Unless otherwise specified, tolerances on hole diameters designated as a drill in the dimensional tables (Tables 3, 4, and 5) shall conform to Table 1: Table 1 - Tolerances on drilled holes Drill Size Range mm
20、Tolerance, mm Plus Tolerance, mm Minus 0.00 6.00 0.1 0.1 Over 6.00 30.0 0.2 0.2 Over 30.0 0.3 0.3 5. PASSAGES Where passages in straight fittings are machined from opposite ends, the offset at the meeting point shall not exceed 0.40 mm. The cross sectional area at the junction of fluid passages shal
21、l not be less than that of the smallest passage. This assembly passage definition does not apply to bent tubes. 6. CONTOUR Details of contour shall be optional with manufacturer provided the tabulated dimensions are maintained and serviceability of the fittings is not impaired. Wrench flats on elbow
22、s shall be optional. SAE INTERNATIONAL J1231 AUG2016 Page 4 of 14 7. STRAIGHT THREADS Straight threads must be class 2A in accordance with ASME B1.1 screw thread specification, External class 2A threads which are plated or coated may exceed 2A diameters but shall not exceed maximum 3A diameters. Whe
23、re external threads are produced by roll threading and the body is not undercut, the unthreaded portion adjacent to the shoulder may be reduced to the minimum pitch diameter. External threads shall be chamfered as specified in the illustrations and dimensional tables. 8. THREAD ECCENTRICITY TOLERANC
24、ES The various thread elements of Class 2A external threads on hose fittings shall be concentric within the limitations specified under General Specifications in ASME B1.1. 9. PIPE THREADS Taper pipe threads designated A in Figures 3A through 3C and Tables 4A through 4C shall conform to the Dryseal
25、American Standard Taper Pipe Thread (NPTF). Specifications are given in detail in SAE J476a. At purchasers option, the pipe thread may be shortened in conformity with the SAE Short Dryseal Taper Pipe Thread (PTF-SAE Short). The length of a fullform external thread shall not be shorter than L2 plus o
26、ne pitch (thread) for Dryseal NPTF and L2 short plus one pitch (thread) for Dryseal PTF SAE Short; except where the thread is cut through into a relieved body or undercut on the fitting, then the minimum full thread length may be reduced by one pitch (thread). External pipe threads shall be chamfere
27、d from the diameters shown in Table 2 to produce the specified length of chamfered or partial thread. Table 2 - Dimensions of chamfers on external pipe threads External Nominal Pipe Thread in Chamfer Dia(1)maximum mm Chamfer Dia(1)minimum mm Length of Chamfered or Partial Thread maximum mm Length of
28、 Chamfered or Partial Thread minimum mm 1/8 8.1 7.6 1.40 0.94 1/4 10.7 10.2 2.13 1.42 3/8 14.0 13.4 2.13 1.42 1/2 17.3 16.8 2.72 1.80 3/4 22.6 22.1 2.72 1.80 1 28.4 27.7 3.30 2.21 1 1/4 37.1 36.3 3.30 2.21 1 1/2 43.2 42.4 3.30 2.21 2 55.1 54.4 3.30 2.21 1. Tabulated diameters conform with Appendix A
29、, SAE J476a. For fittings specified in Figures 3A through 3E, Tables 4A through 4C, unspecified detail with respect to dimensions, tolerances, contours, material, workmanship and so on, must conform to the general specifications for hydraulic tube fittings per SAE J514. SAE INTERNATIONAL J1231 AUG20
30、16 Page 5 of 14 10. MATERIALS AND MANUFACTURE Formed tube hose fittings shall be made from brass, steel, or other materials listed in SAE J846, and specified by the purchaser. Brass shall be SAE UNS C36000 (half hard), SAE UNS C34500, or SAE UNS C35000 for bar or extruded stock and SAE UNS C37700 fo
31、r forgings. Steel tubing shall be SAE standard single wall intended for general applications in low pressure automotive and hydraulic systems. When steel tubing is used for a formed tube connection, the wall thickness shall be the manufacturers option unless specified by the purchaser. Dimension D N
32、ominal I.D. in Table 3 does not apply to steel tubing. However, the D dimension shall be the same as the nominal tubing I.D. At the manufacturers option, parts may be machined or milled from bar, forged, or of multiple component design. Fittings made from multiple components shall be capable of with
33、standing 100 psi (minimum) without leakage or failure. Figure 2 - Formed tube connection styles SAE INTERNATIONAL J1231 AUG2016 Page 6 of 14 Table 3 - Dimensions for beaded tube hose connections (reference figure 1) SAE Hose Dash Size Tube OD Nominal mm Tube OD Nominal Inch A 0.25 mm B Referenmm C R
34、eference mm D(1)(2) Nominal ID mm E 1.m-3 4.76 3/16 5.60 0.40 1.65 3.2 25 -4 6.35 1/4 7.40 0.50 2.05 4.8 25 -5 7.94 5/16 9.15 0.60 2.45 6.4 25 -6 9.52 3/8 10.95 0.70 2.85 7.5 25 -7 11.11 7/16 12.45 0.70 2.85 9.1 25 -8 12.70 1/2 14.20 0.75 3.05 10.3 25 -9 14.29 9/16 15.75 0.75 3.05 11.1 25 -10 15.88
35、5/8 17.55 0.85 3.40 12.7 25 -12 19.05 3/4 20.85 0.90 3.60 15.9 25 -16 25.4 1 26.90 0.75 4.00 21.4 25 -20 31.75 1-1/4 34.45 1.35 5.40 27.8 25 -24 38.10 1-1/2 41.25 1.60 6.35 34.1 25 -32 50.80 2 54.50 1.85 7.40 46.8 25 -40 63.50 2-1/2 67.95 2.25 8.95 30 -48 76.20 3 80.65 2.25 8.95 30 -56 88.90 3-1/2 9
36、3.35 2.25 8.95 30 -64 101.6 4 106.60 2.50 10.05 30 -72 114.3 4-1/2 119.30 2.50 10.05 30 -80 127.0 5 132.00 2.50 10.05 30 (1) See Section 10. (2) Internal Diameters for size -40 through -80 not included. These sizes are not machined, and Internal Diameters are resultant of the tubing wall thickness s
37、elected. 11. FINISH The external surfaces and threads of all carbon steel parts shall be plated or coated with a suitable material that passes a 96 h salt spray test in accordance with ASTM B 117. Any appearance of red rust during the 96 h salt spray test shall be considered failure, except for the
38、following: a. All internal fluid passages b. Edges such as hex points, serrations and crests of threads where there may be mechanical deformation of the plating or coating typical of mass-produced parts or shipping effects. c. Areas where there is mechanical deformation to the plating or coating cau
39、sed by crimping, flaring bending and other post-plate metal forming operations. d. Areas where the parts are suspended or affixed in the test chamber where condensate can accumulate. Parts manufactured to this specification shall not be cadmium plated. Hexavalent chromate coatings are not preferred
40、for commercial and industrial usage due to environmental reasons. Internal fluid passages shall be protected from corrosion during storage and shipping. Changes in plating may affect torque and require requalification when applicable. SAE INTERNATIONAL J1231 AUG2016 Page 7 of 14 12. WORKMANSHIP Work
41、manship shall conform to the best commercial practice to produce high quality fittings. Fittings shall be free from all hanging burrs, loose scale, and all other defects that might affect serviceability. All sealing surfaces must be smooth except that annular tool marks up to 2.5 m maximum, unless o
42、therwise specified, shall be permissible. 13. ASSEMBLY CONSIDERATIONS Use of a compatible lubricant or sealant in assembling Dryseal pipe threads may be desirable to minimize galling and effect a tight seal. 14. FORMED TUBE CONNECTIONS Formed tube connections may be shaped to either of four styles.
43、Type 2 connections, shall be supplied unless agreed to by the purchaser and the manufacturer. 15. HOSE FITTINGS Two types of hose fittings are defined. Male Dryseal Pipe Thread (Figure 3, Table 4) and Male Straight Thread O-Ring Boss in accordance with SAE J1926-3 (Figure 4, Table 5). Type 2 connect
44、ions, shall be supplied, unless agreed to by the purchaser and the manufacturer. SAE INTERNATIONAL J1231 AUG2016 Page 8 of 14MALE DRYSEAL PIPE THREAD TYPE Figure 3A - Male pipe thread hose connector (430160) Table 4a - Dimensions of male pipe thread hose connectors Nominal Hose I.D. mm Hose Dash Siz
45、e A Dryseal Taper Thread NPTFThread Dash Size C Nominal Hex inch D(1) (2)from Table 3 mm D1(1)Dia mm L 1.5 mm L1Max mm L2Ref mm L3Max mm T Min mm 6 4 1/8 2 7/16 4.8 4.8 38.0 63.6 9.7 11.7 5.6 6 4 1/4 4 9/16 4.8 7.0 38.0 69.1 14.2 16.2 6.4 10 6 1/4 4 5/8 7.5 7.0 38.0 69.1 14.2 16.2 6.4 10 6 3/8 6 3/4
46、 7.5 10.3 38.0 71.4 14.2 16.2 6.4 12 8 3/8 6 3/4 10.3 10.3 38.0 71.4 14.2 16.2 6.4 12 8 1/2 8 15/16 10.3 13.5 38.0 77.8 19.0 21.1 7.9 16 10 3/8 6 7/8 12.7 10.3 38.0 71.4 14.2 16.2 6.4 16 10 1/2 8 15/16 12.7 13.5 38.0 77.8 19.0 21.2 7.9 20 12 3/8 6 1 15.9 10.3 38.0 71.4 14.2 16.2 6.4 20 12 1/2 8 1 15
47、.9 13.5 38.0 77.8 19.0 21.2 7.9 20 12 3/4 12 1-1/8 15.9 18.0 38.0 79.1 19.0 21.2 9.7 25 16 3/4 12 1-1/4 21.4 18.0 38.0 79.1 19.0 21.2 9.7 25 16 1 16 1-3/8 21.4 23.8 38.0 83.9 23.9 25.9 9.7 30 20 1 16 1-1/2 27.8 23.8 38.0 83.9 23.9 25.9 9.7 30 20 1-1/4 20 1-3/4 27.8 31.7 38.0 93.0 24.6 26.6 11.2 30 2
48、0 1-1/2 24 2 27.8 38.0 38.0 93.8 25.4 27.4 12.7 38 24 1-1/4 20 1-3/4 34.1 31.7 38.0 93.0 24.6 26.6 11.2 38 24 1-1/2 24 2 34.1 38.0 38.0 93.8 25.4 27.4 12.7 50 32 1-1/2 24 2-1/4 46.8 38.0 38.0 93.8 25.4 27.4 12.7 50 32 2 32 2-5/8 46.8 49.0 38.0 99.1 26.2 28.2 17.5 (1) At the manufacturers option, the through passage in Figure 2A may conform with the smaller diameter specified or the appropriate end may be counterbored to the larger diameter. (2) See Section 10. SAE INTERNATIONAL J1231 AUG2016 Page 9 of 14Figure 3B - 90 male Figure 3C - 45 male pipe h
