SAE J20-2002 Coolant System Hoses.pdf
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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 therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. TO PLACE A DOCUMENT ORDER; +1 724-776-4970 FAX: +1 724-776-0790 SAE WEB ADDRESS http:
3、/www.sae.org Copyright 2002 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 STANDARD J20 REV. JAN2002 Issued194401 Revised2002-01 Superseding J20 NOV2001 Coolant System Hoses ForewordSections 13.3 to 13.4 w
4、ere removed to be in accordance with military requirements. 1.ScopeThis SAE Standard covers reinforced and flexible hoses intended for use in water and ethylene glycol-based engine-coolant system applications. 2.References 2.1Applicable PublicationsThe following publications form a part of the speci
5、fication to the extent specified herein. Unless otherwise indicated, the latest revision of SAE publications shall apply. 2.1.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 150960001. SAE J1231Formed Tube Ends for Hose Connections and Hose Fittings SAE J1508Hose Clamp Sp
6、ecification SAEJ1610Test Method for Evaluating the Sealing Capability of Hose Connections with a PVT Test Facility SAE J1638Compression Set of Hoses or Solid Discs SAEJ1684Test Method for Evaluating the Electrochemical Resistance of Coolant System Hoses and Materials SAE J2370Geometric Dimensions an
7、d Tolerancing for Curved Hose SAE J2387Dimensions and Tolerances for Coolant System Hoses 2.1.2ASTM PUBLICATIONSAvailable from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 194282959. ASTM D 380Methods of Testing Rubber Hose ASTM D 395Test Methods for Rubber Property Compression Set ASTM D 412T
8、est Method for Rubber Properties in Tension ASTM D 413Test Methods for Rubber Property Adhesion to Flexible Substrate ASTM D 471Test Method for Rubber Property Effect of Liquids ASTM D 573Test Method for Rubber Deterioration in an Air Oven ASTMD1149Test Method for Rubber Deterioration Surface Ozone
9、Cracking in a Chamber (Flat Specimens) ASTM D 2240Test Method for Rubber Property Durometer Hardness SAE J20 Revised JAN2002 -2- 2.1.3ISO PUBLICATIONAvailable from ANSI, 11 West 42nd Street, New York, NY 10036-8002. ISO 9001Quality systemsModel for quality assurance in design, development, productio
10、n, installation and servicing 2.1.4AUTOMOTIVE INDUSTRY PUBLICATIONAvailable from AIAG, 26200 Lasher Road, Suite 200, Southfield, MI 48034-7100. QS 9000Quality System Requirements 2.2Related PublicationsThe following publications are provided for information purposes only and are not a required part
11、of this document. 2.2.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J20-1Coolant Hose (Supplement to SAE J20 for Government Use Replacing Part of MS51230) SAE J20-2Coolant HoseNormal Service Type Convoluted, Wire Support Hose (Supplement to SAE J20 for G
12、overnment Use Replacing Part of MS51008) 3.Definitions of Hose Types 3.1SAE 20R1Heavy-duty type for service in heavy-duty application. This type is available in two wall thicknesses as indicated in 6.3. 3.2SAE 20R2Flexible heavy-duty wire embedded type for the same service as SAE 20R1. 3.3SAE 20R3He
13、ater hose for normal service. 3.4SAE 20R4Radiator hose for normal service. 3.5SAE 20R5Convoluted wire supported type for normal service. 3.6Hose Special Designators for SAE 20RXYX Refers to the hose type. Y designators may be used for hoses with special features. Multiple Y designators may be used i
14、f needed. 3.6.1HTThis High Temperature designation is for any hose type, SAE 20R1 to SAE 20R5, which is required to operate in an environment above 125 C. (See Section 11.) 3.6.2ECThis Electrochemical designation is for any hose type SAE 20R1 to SAE 20R5 which is required to have electrochemical res
15、istance as defined by SAE J1684. (See Section 12.) 3.6.3LTThis Low Temperature designation is for any hose type SAE 20R1 to SAE 20R5 which is required to operate in an environment down to 55 C. (See Section 13.) 3.7Hose ClassesCompounds based on different synthetic rubber grades are specified and de
16、signated (see 5.2 for test methods): Class Ahigh-temperature resistant Class Bhigh oil resistant Class Cmedium oil resistant Class D-1low oil resistant, improved service Class D-2low oil resistant, standard service Class D-3low oil resistant, high-temperature resistant, premium service Class Elow oi
17、l resistant, fiber elastomer composite SAE J20 Revised JAN2002 -3- Physical characteristics for each hose class are shown in Table 1. 3.8MarkingThe outer cover will be printed with the designation SAE 20RXY (the X being the hose type and Y any special designator(s) such as “LT”), class, size of the
18、inside diameter in millimeters, hose manufacturers code marking, and any other identification as agreed upon between user and manufacturer/supplier. It is recommended that this marking shall appear on the outer cover of the hose at intervals not greater than 380mm. 3.8.1SMALL ID OR SHORT HOSEIf ther
19、e is insufficient space on the hose for the required marking due to size or configuration, the marking shall be agreed upon by the customer and the manufacturer/supplier. 4.Dimensional RequirementsGeometric Dimensioning and Tolerancing requirements are outlined in SAE J2370. The following requiremen
20、ts are minimal standards: 4.1Tube and Cover ThicknessMinimum thickness shall be 1.6 mm for the tube and 0.8 mm for the cover. NOTEThis requirement does not apply for hoses without distinctive tube and cover construction. TABLE 1COOLANT SYSTEM HOSE ELASTOMERIC MATERIAL, PHYSICAL PROPERTIES SAE Design
21、ation Typical Elastomer Class A Silicone Class B NBR Class C CR Class D1 EPDM Class D2 EPDM Class D3 EPDM Class E EPDM/Fiber Typical Temperature Range, C 55 to 17540 to 10040 to 10040 to 12540 to 12540 to 15040 to 125 Original Properties Durometer, points Shore A55 to 7555 to 7555 to 7555 to 7555 to
22、 7555 to 7565 to 85 Tensile, min, MPa5.58.57.07.05.07.05.0 Elongation, min, %200250200300150300100 Oven Aging Conditions and Change Limits, Hours/C70/17570/10070/10070/12570/125168/15070/125 Durometer, points Shore A+10+15+20+15+15+15+15 Tensile, max %15152020203520 Elongation, max, %40505050506550
23、Oil Immersion Change Limits ASTM No. 3 Oil or IRM 903 (IRM 903 is being phased in to replace ASTM No. 3) Hours/C70/10070/10070/100 Volume, max, %0 to +455 to +25+80 Tensile, max, %402050 Coolant Immersion (Tube only) Change Limits Hours/at Boiling Point707070707016870 Volume, %0 to +400 to +200 to +
24、205 to +205 to +205 to +205 to +20 Durometer, points Shore A10 to +1010 to +1010 to +1010 to +1010 to +1010 to +1010 to +10 Tensile, max, %30202020202020 Elongation, max, %25404050252525 Compression Set C125100100125125125125 70 h, max, %40507575857585 Cold Flexibility (C)(1) 1.LT designator extends
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