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 theref
2、rom, 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 2012 SAE International All rights reserved. No part of this pub
3、lication 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: +1 724-776-4970
4、(outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2296_201206SURFACEVEHICLESTANDARDJ2296 JUN2012 Issued 1996-09Revised 2012-06Superse
5、ding J2296 NOV1998 Retest of Refrigerant Container RATIONALEThis standard has been updated to update references and clarify regional requirements as well as the five year re-test requirement.1. SCOPE To provide a procedure to inspect a refrigerant cylinder used in equipment servicing mobile air-cond
6、itioning (A/C) systems. This includes the pressure cylinder used for refrigerant recovery/recycling and charging equipment. 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
7、 of SAE publications shall apply. 2.1.1 CGA Specifications Available from Compressed Gas Association, Crystal Square #2, Jefferson Davis Highway, Arlington, VA 22202-4102. CGA S-1.1 Pressure Relief Device Standards - Cylinders for Compressed Gases CGA C-6 Standards for Visual Inspection of Steel Com
8、pressed Gas Cylinders CGA C-6.1 Standards for Visual Inspection of High Pressure Aluminum Compressed Gas Cylinders 2.1.2 DOT Specifications Available from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. DOT 39 DOT approved cylinder specifications (except those
9、 operating under exemptions) are found in 49 Code of Federal Regulations (CFR) sections 178.1 through 178.68. SAE J2296 Revised JUN2012 Page 2 of 7 2.1.3 Underwriters Laboratories Available from Underwriters Laboratories, 333 Pfingsten Road, Northbrook, IL 60062-2096. UL 1769 Cylinder Valves UL 1963
10、 Standard for Refrigerant Recovery/Recycling Equipment, First Edition 1993, Copyright 1989 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,
11、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 J513 Refrigeration Tube Fittings - General Specifications SAE J1990 Recovery and Recycle Equipment for Mobile Automotive Air-Conditioning Systems SAE J2197 HFC-
12、134a (R-134a) Service Hose Fittings for Automotive Air-Conditioning Service Equipment SAE J2209 CFC-12 (R-12) Refrigerant Recovery Equipment for Mobile Automotive Air-Conditioning Systems SAE J2210 HFC-134a (R-134a) Recovery/Recycling Equipment for Mobile Air-Conditioning Systems 2.2.2 ARI Publicati
13、on Available from ARI, 4301 North Fairfax Drive, Suite 425, Arlington, VA. ARI Guideline K 1990 Cylinders for Recovered Fluorocarbon Refrigerants 2.2.3 DOT Publication Available from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. Part III Environmental Protec
14、tion Agency, 40CFR Part 82 - Protection of Stratospheric Ozone: Labeling Supplemental Proposal Final Rule SAE J2296 Revised JUN2012 Page 3 of 7 3. STORAGE CONTAINERS (CYLINDER/TANK) 3.1 Federal Requirements The container stores the refrigerant and protects it from outside contamination. Most refrige
15、rants are under pressure at ambient temperatures. Refrigerants should never be charged and stored in unapproved containers such as DOT Specification 39 disposable cylinders. 3.1.1 DOT Stands for the U.S. Department of Transportation Federal law forbids transporting DOT 39 cylinders if refilled and p
16、enalties up to a $25 000 fine and 5 years imprisonment may be expected (Title 49 U.S.C. (United States Code) Sec. 1809).3.1.2 Proper storage containers are DOT approved refillable containers which are stamped with the information in Figure 1: FIGURE 1 - INFORMATION FOR CONTAINERS 3.1.2.1 The sample
17、information is for a tank commonly called a “50-lb tank.” Other size tanks shall have the appropriate W.C. and T.W. markings. 3.1.3 The first line is the DOT code for a container rated at 400 psig (2760 kPa) or 302 psig (2084 kPa) or 350 psig (2415 kPa) working pressure. 3.1.3.1 The second line is t
18、he container manufacturer serial number. 3.1.3.2 The third line is the container manufacturer identification number. 3.1.3.3 The fourth line W.C. is the water capacity in pounds when completely filled and T.W. is the cylinder tare weight in pounds. Since common refrigerants are heavier than water, t
19、his tank can safely be filled with 23 kg for CFC-12 (R-12) or 21 kg of HFC-134a (R-134a). 3.1.3.4 The fifth line is the manufacturers date code, which is important for the retested date. 3.2 The containers and valves should meet UL 1963 which requires that: 3.2.1 The storage container shall comply w
20、ith DOT Specifications, 49 CFR, and have a service pressure rating not less than the recovery equipments pressure limiting device. 3.2.2 The cylinder valve shall comply with the Standard for Cylinder valves, UL 1769. The pressure relief device shall comply with the Pressure Relief Device Standard Pa
21、rt 1 - Pressure Relief Device Standards - Cylinders for Compressed Gases”, Compressed Gas Association Pamphlet S-1.1. 3.2.3 The tank assembly shall be marked to indicate the first retest date, which shall be 5 years from date of manufacture. Also the marking shall indicate that retest must be perfor
22、med every subsequent5 years. The marking shall be in letters at least 6 mm high. SAE J2296 Revised JUN2012 Page 4 of 7 3.3 ARI Guideline K describes a color coding scheme for refrigerant cylinders. The color for recovered and recycled refrigerants, and refrigerant on its way back to a reclaim facili
23、ty, is gray with a yellow top. Some recycling equipment manufacturers have provided light blue cylinders with yellow tops for automotive HFC134a (R-134a) applications.3.4 Most storage containers are equipped with SAE 6.4 mm refrigeration flare fittings. For automotive HFC-134a (R-134a) applications,
24、 both new refrigerant cylinders (DOT 39) and refillable storage containers are fitted with special SAE 12.7 mm threads. 3.5 Storage Containers requirements may have different regional applicable requirements. 3.5.1 This standard contains informational content on the requirements of field pressure ve
25、ssels. Federal transportation laws (examples: US DOT, ISO, Japanese-KHK) and/or pressure vessel codes (examples: ASME, CGA, ISO, Japanese-KHK) take precedence over the stated requirements of this SAE Standard whenever applicable in their regions of enforcement 4. CONTAINER LABELING EPA regulations r
26、equire labeling refrigerant tanks containing Class I (CFC) and Class II (HCFC) refrigerants. Each container shall bear the following warning statement: WARNING: Contains (Insert refrigerant), a substance which harms public health and environment by destroying ozone in the upper atmosphere. 5. FILLIN
27、G CONTAINERS Care must be exercised when filling storage containers because liquid refrigerants expand when heated. Referring to Figure 2, the tank on the left is filled to an 80% level at 21 C. The tank on the right shows that same amount of refrigerant warmed to 70 C. 5.1 When a container is overf
28、illed and subsequently exposed to higher temperatures, hydraulic expansion can cause the relief valve to open and vent refrigerant, and even can lead to a ruptured container. SAE and UL standards require a container overfill protection based upon 80% liquid fill at 24 C. 5.2 A full container conditi
29、on can be determined by monitoring weight while filling. A predetermined load deflects the load cell to trip a limit switch. An electronic scale used for charging will also detect a tank overfill condition. (See Figure 3) FIGURE 2 - EXPANSION OF LIQUID REFRIGERANT WHEN HEATED SAE J2296 Revised JUN20
30、12 Page 5 of 7 FIGURE 3 - MECHANICAL/ELECTRICAL LOAD CELL TANK OVERFILL PROTECTION 5.2.1 For recovery units handling more than one refrigerant, allowable weight limits must be based on the refrigerant with the lowest density to prevent overfilling the container. 5.3 Float switches, or other liquid l
31、evel sensors, can be used to detect full containers. They correctly gauged the fill level no matter the refrigerant type or oil content in the container. 6. RETESTING CYLINDERS DOT regulations require that cylinders be retested every 5 years. 6.1 The appropriate categories are DOT-3A, DOT-3AA, DOT-3
32、A480X, DOT-4B, DOT-4BA, DOT-4BW, and DOT-4E containing fluorinated hydrocarbons and mixtures thereof which are commercially free from corroding components. 6.2 External Visual Examination with Hydrostatic Test 6.2.1 Retest at 5-year intervals. 6.2.2 An authorized retester must perform a visual exami
33、nation using CGA pamphlets C-6 and C-6.1. 6.2.2.1 If the cylinder has a float switch, remove it and insert a plug prior to the hydrostatic test. Examine the float assembly for corrosion and visual damage. 6.2.3 Conduct a hydrostatic test by filling the cylinder with distilled water and pressurizing
34、it at 2 times the normal service pressure. 6.2.4 Measure expansion during the hydrostatic test. SAE J2296 Revised JUN2012 Page 6 of 7 6.2.5 Condemn the cylinder when the tank leaks, has external corrosion, denting, bulging, or evidence of rough usage, or when the permanent expansion exceeds 10% of t
35、he total expansion after the hydrostatic test. 6.2.5.1 If the cylinder is returned to service, replace the corroded or damaged float assembly or reinstall the original assembly. 6.2.5.2 Assure that the float assembly is checked for calibration as identified in 6.2.8. 6.2.6 Owners must keep records s
36、howing the result of reinspection and retesting until the cylinder is again reinspected or retested. 6.2.7 Mark each cylinder passing retest with the cylinder testers identification number set in a square pattern, between the month and year of the retested date in characters not less than 3 mm high
37、with the first character occupying the upper left corner of the square pattern. For example, a cylinder retested in May 1984 by approved retester, A123 would be stamped as shown in Figure 4: FIGURE 4 - EXAMPLE OF A CYLINDER TESTED IN MAY 1984 6.2.8 Retest of Float Switch Assembly 6.2.8.1 The cylinde
38、r is to be placed on a calibrated scale and the weight recorded. Connect an ohmmeter to the wire leads (or terminals) attached to the top float switch. Mount the cylinder upright. Gradually fill the cylinder with distilled water until the ohmmeter indicates that the float switch is activated. Immedi
39、ately stop filling the cylinder. Record the final weight of the cylinder filled with water. Subtract the initial cylinder weight from the final recorded weight of the cylinder to obtain the amount of water kg (lb) required to activate the float switch. The weight of the water required to activate th
40、e float switch shall not exceed the W.C. marking on the cylinder multiplied by 0.8 (example 47.6 x 0.8 = 38.08). 6.3 Removal of Moisture 6.3.1 After completing the pressure test in 6.2.3, the container must be gravity drained for 30 min. 6.3.2 Pressurize the container with dry air or nitrogen. 6.3.3
41、 After 30 min vent the cylinder. 6.3.4 Using an operating vacuum source and the cylinder stabilized in a ambient temperature of 65 C 5 C, evacuate and maintain the cylinder to at least 10 mm of mercury absolute pressure for 1 h. SAE J2296 Revised JUN2012 Page 7 of 7 7. NOTES 7.1 Marginal Indicia A c
42、hange bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE INTERIOR CLIMATE CONTROL STANDARDS COMMITTEE
