SAEJ10v001

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 therefrom, 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. QUESTIONS REGARDING THIS DOCUMENT: (412) 772-8512 FAX: (412) 776-0243 TO PLACE A DOCUMENT ORDER; (412) 776-4970 FAX: (412) 776-0790 SAE WEB ADDRESS http://www.sae.org Copyright 1990 Society of Automotive Engineers, Inc. All rights reserved. Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 STANDARD Submitted for recognition as an American National Standard J10 REV. OCT90 Issued 1959-05 Revised 1990-10-05 Superseding J10 SEP80 (R) AUTOMOTIVE AND OFF-HIGHWAY AIR BRAKE RESERVOIR PERFORMANCE AND IDENTIFICATION REQUIREMENTS Foreword—This Document has not changed other than to put it into the new SAE Technical Standards Board Format. 1. SCOPE—This SAE Standard applies to all new production air brake reservoirs used in automotive vehicles and off-road machines. This document defines an "air brake reservoir" as a reservoir having single or multiple compartments that is used for storage of compressed air. This document does not apply to accumulators or reservoirs for storage of gases other than compressed air. The reservoirs tested per these requirements shall be selected from production stock and shall be equipped with all permanently attached items such as mounting brackets and fitting bosses. 1.1 Purpose—The purpose of this document is to provide minimum performance requirements and a method of identifying new production air brake reservoirs designed for use on automotive vehicles and off-highway machines. 2. References 2.1 Applicable Publications—The following publications form a part of the specification to the extent specified herein. 2.1.1 ASTM PUBLICATIONS—Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM B 117-64—Method of Salt Spray (Fog) Testing ASTM B 117-73—Salt Spray (Fog) Testing ASTM D 1654-79a—Evaluation of Painted or Coated Specimens Subjected to Corrosion Environments 3. Certification Requirements 3.1 Proof Tests—All air brake pressure reservoirs shall be capable of withstanding a hydrostatically applied internal pressure of not less than five times the reservoir rated working pressure. There shall be no indication of rupture or permanent circumferential deformation exceeding 1% after having been subjected to this test pressure for 5 min minimum. SAE J10 Revised OCT90 -2- When testing multiple compartment reservoirs, the pressure shall be applied to and exhausted from all compartments simultaneously. 3.2 FMVSS Conformance (Off-Highway Applications Need Not Comply)—Initially and at a continuing frequency of not less than once annually, one or more air brake reservoirs of each size, type (single compartment, multiple compartment, dual compartment with integral check valve) and mounting configuration must be tested for compliance to all requirements of applicable Federal Motor Vehicle Safety Standards. 4. Performance Requirements 4.1 Leakage Tests—Each air brake reservoir shall be capable of following applicable tests. When air pressure is used to make this test, protection against explosive rupture shall be provided. A sealing compound may be used to seal port threads. 4.1.1 SINGLE COMPARTMENT RESERVOIRS—All air reservoirs shall be subjected to twice the indicated rated working pressure. Leakage shall not exceed 20 sccm. 4.1.2 MULTIPLE COMPARTMENT RESERVOIRS WITHOUT CHECK VALVES 4.1.2.1 Reservoir Shell—Perform the same test as in by applying the pressure to and exhausting from all compartments simultaneously. 4.1.2.2 Reservoir Baffle Plates—Check for leakage and weld integrity of the internal baffle plates by applying a pressure equal to the indicated rated working pressure to one side of each baffle plate. Leakage shall not exceed 20 sccm. NOTE—For dual compartment reservoirs pressurize only one compartment at a time, for three or more compartment reservoirs, pressurize each compartment individually to check each baffle plate side. 4.1.3 DUAL COMPARTMENT RESERVOIRS WITH INTEGRAL CHECK VALVES 4.1.3.1 Reservoir Shell—Perform the same test as in except the pressure must be applied through the supply (inlet) compartment and exhausted through the service (exhaust) compartment. 4.1.3.2 Reservoir Baffle Plates—Perform the same tests as in by plugging the check valve closed when required. 4.1.3.3 Check Valve—With a pressure equal to the indicated rated working pressure in both compartments, exhaust pressure from the supply compartment. The service compartment pressure must remain at the rated working pressure. Leakage past the check valve shall not exceed 100 sccm. 4.2 Corrosion Test—All air brake reservoirs shall be protected internally and externally against detrimental corrosion through the use of either a corrosion-resistant metal or a suitable protective coating or treatment. Any additional tests and requirements deemed important shall be agreed upon by purchaser and seller. 4.2.1 EXTERIOR SURFACE—The exterior surface will withstand a minimum of 48 h exposure to salt spray in accordance with ASTM B 117-73. Upon completion of the exposure, no corrosion spots or blisters are permissible. NOTE—Exterior surface test does not require a scribed specimen (disregard ASTM B 117-73, paragraph 4.4). SAE J10 Revised OCT90 -3- Weld areas, hidden lap areas such as end cap protrusion, internal baffle crevices, small openings between mounting bracket and shells, and fitting boss clearances shall be disregarded in the corrosion evaluation. Also, edges or areas damaged in specimen preparation or purposely unpainted areas such as threads shall be disregarded. 4.2.2 INTERIOR SURFACE—The interior surface will withstand a minimum of 96 h salt spray in accordance with ASTM B 117-73. Upon completion of the exposure, no corrosion spots or blisters are permissible. Weld areas, hidden lap areas such as end cap protrusion, internal baffle crevices, and fitting boss clearances shall be disregarded in the corrosion evaluation. Also, edges or areas damaged in specimen preparation or purposely unpainted areas such as threads shall be disregarded. 4.2.2.1 Interior Adhesion Test—In addition to the above, a scribed specimen shall be exposed to a minimum of 96 h salt spray per ASTM B 117-73. Upon completion of the exposure, the loss of adhesion from the scribe mark shall be determined in accordance with Procedure A (Method 1 or Method 2) of ASTM D 1654-79a (Reapproved, 1984). All maximum creepage points from the scribe are to be measured. There should be a minimum of six measurements each side of the scribe (12 total measurements). No one measurement greater than 0.125 inch is permissible. NOTE—Tests done in and can be done on the same specimen. The no corrosion spots or blisters required do not include the scribe area. 4.2.3 SPECIMEN PREPARATION—A production reservoir shall be quartered by cutting it in such a manner that each section includes 50% of the end cap and 25% of the shell. The sectioned test reservoir should have a minimum of 72 h air exposure. Then, the specimen shall be scribed in accordance with paragraph 5.1.2 of ASTM D 1654-79a (Reapproved, 1984). The specimen is then to be placed in the salt spray booth in a manner to provide thorough drainage and also in accordance with paragraph 5.1.1 of ASTM D 1654-79a (Reapproved, 1984). 5. Identification—All air brake reservoirs which meet the requirements of this document shall be permanently identified to show the manufacturer, SAE J10 plus latest revision, the rated working pressure and the date of manufacture (day, month and year). For example: a. XYZ - SAE J10 OCT90 - 150 PSI Rated Working Pressure - 010887 6. Notes 6.1 Marginal Indicia—The change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions have been made to the previous issue of the report. An (R) symbol to the left of the document title indicates a complete revision of the report. PREPARED BY THE SAE TRUCK AND BUS BRAKE SUPPLY AND CONTROL COMPONENTS COMMITTEE SAE J10 Revised OCT90 Rationale—The changes are as follows; General - There are no serious problems in the field today. There is no method of correlating accelerated test results to field usage. The "no corrosion spots or blisters" requirement is a result of the inaccuracy of various procedures reviewed to specify and evaluate minimum allowable corrosion spots. 4.2 - This is carryover wording from the J10 AUG85 Standard. Added optional test statement due to deletion of 4.3. 4.2.1 - There have been no known failures caused by corrosion from exterior-to-interior or by abrasion removing the exterior coating. Most OEs specify primer-only on the reservoir exterior with this surface being painted, after installation, along with the vehicle. The primer-only areas (under the mounting brackets) are required to pass the no rust criteria. Coverage integrity in the weld areas are inferior due to oxidation; therefore, weld areas are excluded from the no rust spots or blisters criteria. 4.2.2 and 4.2.2.1 - Internal corrosion is the most common problem causing interior-to-exterior leakage holes. There have been no known catastrophic failures caused by this corrosion. The coating adhesion test has been added to protect the air system against contamination caused by interior coating breakaway. The ASTM methods for scribe preparation after exposure (air blow-off or scraping) are used. The mean creepage as specified in Table 1 of ASTM D 1654 was not used due to the difficulty in calculating the mean distance from the scribe and the inaccuracies that could be caused by this type of statistical analysis. The 0.125 inch requirement was chosen due to this measurement being slightly better than the middle of Table 1 of ASTM D 1654. Also, the insert of a 1/4 tube fitting (0.133 inch diameter) is larger than a particle of this diameter. NOTE—This requirement may need to be reviewed when the task force for contaminant testing begins formulating its recommended practice. Coverage integrity in the weld areas are inferior due to oxidation; therefore, weld areas are excluded from the no rust spots or blisters criteria. 4.2.3 - The 72 h air exposure now becomes a minimum. The scribe mark gets placed on the specimen after the air exposure. The ASTM method for preparing the specimen and adding the scribe mark is used. The scribe on the exterior surface is not required. 4.3 - It was determined that this paragraph is not required because many purchasers already have their own specifications. One sentence was added to 4.2 to allow additional requirements with J10 being the minimum specification. Section 5 - In order to comply with the latest SAE revision designation, the identification label on the reservoir required an update. Disapproval - One disapproval has not been resolved. The inclusion of an immersion test is the main reason for the objection with tougher industry standards being the rationale. The Task Force believes that the increase in salt spray exposure hours and the addition of the scribe test addresses the industry search for improvement. The addition of an immersion test was discussed; but the consensus of the Task Force was to use an established ASTM test procedure for coating adhesion (4.2.2 and 4.2.2.1). The ASTM test was simple to perform and adequate in its severity to check adhesion. As previously stated, there are no widespread serious problems in the field today; therefore, the Task Force believes that the revision, as written, not only meets, but exceeds the stated objectives with the inclusion of the scribe/adhesion test. Relationship of SAE Standard to ISO Standard—Not applicable. SAE J10 Revised OCT90 Application—This SAE Standard applies to all new production air brake reservoirs used in automotive vehicles and off-road machines. This document defines an "air brake reservoir" as a reservoir having single or multiple compartments that is used for storage of compressed air. This document does not apply to accumulators or reservoirs for storage of gases other than compressed air. The reservoirs tested per these requirements shall be selected from production stock and shall be equipped with all permanently attached items such as mounting brackets and fitting bosses. Reference Section ASTM B 117-64—Method of Salt Spray (Fog) Testing ASTM B 117-73—Salt Spray (Fog) Testing ASTM D 1654-79a—Evaluation of Painted or Coated Specimens Subjected to Corrosion Environments Developed by the SAE Truck & Bus Brake Supply & Control Components Committee Sponsored by the Truck & Bus Brake Committee