SAE J 2064-2015 Coupled Automotive Refrigerant Air-Conditioning Hose Assemblies.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 ther

2、efrom, 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 2015 SAE International All rights reserved. No part of this

3、publication 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: +1 724-776-49

4、70 (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/J2064_201508 SURFACE VEHICLE STANDARD J2064 AUG2015 Issued 1993-06 Revised 2015-

5、08 Superseding J2064 FEB2011 Coupled Automotive Refrigerant Air-Conditioning Hose Assemblies RATIONALE SAE J3062 has been issued to separate requirements for the hose used in SAE J2064 Coupled Refrigerant Automotive Air-Conditioning Hose Assembly Requirements into its own standard. Changes made to t

6、his document include: x Title: This will now be a “coupled” hose assembly standard. x Scope: Changed to reflected “coupled” hose assemblies and removed hose only references. Added the requirement that an SAE J2911 hose must be used in the assembly which meets the requirements of SAE J3062 Automotive

7、 Air-Conditioning Hose. x References: Added SAEJ2911 and SAEJ3062. x Manufacture: Deleted this section which is related to hose and is now part of SAEJ3062. x Identification: Changed from “Hose Identification” to “Hose Assembly Identification”. Deleted “Bulk Hose” section and removed hose marking re

8、ferences from “Hose Assembly Identification”. x Testing: Removed “Age Test”, “Cold Test”, “Vacuum Flattening”, “Length Change”, “Extraction Test”, “Ozone Test” and “Moisture Ingression” tests. Removed listing these test results from Table A1 “Certification Table” shown in Appendix A. These are now r

9、equirements of SAEJ3062. 1. SCOPE The Scope of SAE J2064 covers coupled hose assemblies intended for containing and circulating lubricant, liquid and gaseous R134a and/or R-1234yf refrigerant in automotive air-conditioning systems. Historically, requirements for the hose used in coupled automotive r

10、efrigerant air conditioning assemblies was included in SAE J2064. SAE J2064 has been changed to establish the requirements for factory and field coupled hose assemblies. SAE J3062 has been issued to define requirements for the hose used in these assemblies into its own standard. SAE J2064 also provi

11、des the necessary values used in SAE J2727 Mobile Air Conditioning System Refrigerant Emission charts for R-134a and R-1234yf. The certified coupling of MAC hose assemblies is required in meeting certain regulatory requirements. SAE INTERNATIONAL J2064 AUG2015 Page 2 of 9 A hose which has met the re

12、quirements of SAE J3062 and certified in J2911 must be used as part of the coupled assembly. A hose which meets the requirements of SAE J3062 does not insure the assembly will meet the requirements of SAE J2064. It is the hose assembly manufacturers responsibility to confirm that the assemblies meet

13、 the specified acceptance criteria for this specification. The hose assembly shall be designed to minimize permeation of the refrigerant, contamination of the system, and to be functional over a temperature range of -30 to 125 C. Specific construction details are to be agreed upon between user and s

14、upplier. Bulk hose produced prior to the release of this standard could be labeled “SAE J2064” and may not meet the requirements of SAE J3062. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicate

15、d, 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 +1 724-776-4970 (outside USA), www.sae.org. SAE J639 Safety Standards for Motor Vehicle Refrig

16、erant Vapor Compression Systems SAE J3062 Automotive Air Conditioning Hose SAE J2911 Procedure for Certification that Requirements for Mobile Air Concitioning System Components, Service Equipment, and Service Technician Training Meet SAE J Standards SAE J2727 Mobile Air Conditioning System Refrigera

17、nt Emission Charts for R-134a and R-1234yf 2.1.2 ASTM Publication Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 380 Methods of Testing Rubber Hose 3. HOSE ASSEMBLY IDENTIFICATION A hose coupling mark

18、ed or tagged “J2064” signifies that it has been coupled, tested, and has met the requirements of SAE J3062 and SAE J2064 for the marked refrigerant(s). These hose assemblies shall be certified per SAE J2911 for SAE J3062 and SAE J2064. Metal stamping on coupling shall include SAE J2064 and shall be

19、at least 2mm minimum height and must be durable and readable. In lieu of the metal stamping on the coupling, a durable tag must be attached to each hose assembly. The tag shall be metal or mylar with a protective plastic cover. The tag information and must be at least 2mm minimum height, durable and

20、 readable and shall include the following information: x SAE J2064 x (2) Name of hose assembly manufacturer 3.1 Hose Assembly Hose Assemblies may be fabricated by the manufacturer, an agent for or customer of the manufacturer, or by the user. Fabrication of permanently attached fittings to refrigera

21、nt hose requires specialized assembly equipment. Refrigerant hose from one manufacturer may not be compatible with fittings supplied by another manufacturer. Similarly, assembly equipment from one manufacturer may not be interchangeable with that of another manufacturer. SAE INTERNATIONAL J2064 AUG2

22、015 Page 3 of 9 4. TESTING The test procedures described in the current issue of ASTM D 380 shall be followed whenever applicable. 4.1 Sample Conditioning Charged Samples shall be stabilized for 24 h at 23 C 2 C prior to testing. Samples shall be checked to ensure specified charge and identify charg

23、e loss. 4.2 Coupled Assembly Permeation Emission Test 4.2.1 Test Specimens - 107 cm Samples The test specimens are to consist of four coupled hose assemblies that have 107 cm 1.2 cm of exposed hose between couplings. Three of the coupled hose assemblies are to be used for determining the permeation

24、rate through the hose at a specific temperature. The fourth coupled and plugged hose assembly is to be used for a control hose. One end of each hose assembly is to be fitted with a capped charge fitting. The other end is to be attached to a canister (optional) or plugged with a fitting. If a caniste

25、r is used, the coupled hose assemblies are to be connected to canisters each having an internal volume of 510 cm3 25 cm3and having a minimum burst strength of 8.6 MPa. 4.2.2 Charging Procedure and Initial Weights The coupled hose assemblies are to be weighed and recorded to 0.01 g to establish an in

26、itial weight prior to charging. The test samples (control sample not charged) are to be evacuated then charged with refrigerant to 70% 3% of the internal volume of the assembly and then reweighed. Cooling of samples is recommended for ease of charging. 4.2.3 Temperature Exposure The test temperature

27、 is 80 C 2 C. 4.2.4 Establish Constant Loss Rate Weigh the samples at the end of the first 24 h temperature exposure and weighing at periodic intervals (minimum period must be 24 h). The weighings shall be reported in net loss of grams, charged sample weight loss minus control sample weight loss. Th

28、e net weight loss versus time shall continue to be recorded until steady state is reached. Steady state is reached when the last four readings are within 10% of the lowest reading or after 25 days, whichever comes first. 4.2.5 Loss Rate Determination No charged specimen may lose more than 40 g durin

29、g the first 24 h period. The permeation rate for each specimen may be determined as follows: a. For Samples that meet the 10% Rule - Establish the slope of steady-state net loss in grams per day for the 107 cm length specimen and multiply by factors in Table 1 to obtain permeation rate. b. For Sampl

30、es that Run for 25 Days - The final weighing period, in which the data recorded will be used to determine the permeation rate, shall be the last 5 days or 7 days of the test period. The samples during the final period shall be weighed 5 times at least 24 h apart. The total net weight loss for the fi

31、nal period, divided by the number of days in the period is multiplied by the factors in Table 1 to obtain the permeation rate. At the end of the temperature exposure period, the refrigerant charge remaining shall be 50% of the original charge minimum. At the conclusion of the test, the refrigerant c

32、harge in each specimen shall be exhausted to a suitable reclamation container. SAE INTERNATIONAL J2064 AUG2015 Page 4 of 9 Table 1 - Conversion factors Nominal Hose Size mm (in) Mean Hose ID mm (in) Multiply g/day by Factor Shown to Obtain kg/m2/year Multiply g/day to Obtain lb/ft2/ year 8 (5/16) 8.

33、1 (0.320) 13.414 2.748 10 (13/32) 10.6 (0.418) 10.251 2.100 13 (1/2) 13.0 (0.510) 8.358 1.713 16 (5/8) 16.1 (0.635) 6.749 1.383 19 (3/4) 19.4 (0.765) 5.601 1.148 In order to obtain conversion factor for hoses not listed in Table 1, use the following equations: for kg/m2/year, Factor = 108.66/D where

34、: D = Inner Diameter (mm) for lb/ft2/year, Factor = 0.877/D where: D = Inner Diameter (inches) 4.2.6 Acceptance Determination The coupled hose assembly shall not be permeable to a refrigerant loss at a rate greater than those listed in Table 1A below. Hose types are defined in SAE J3062. Table 1A -

35、Permeation limits Refrigerant Hose Type R-134a R-1234yf A, B 15 kg/m2/year 18 kg/m2/year C, D, E, F 5 kg/m2/year 5 kg/m2/year Cu, Du, Eu, Fu 1.5 kg/m2/year 1.5 kg/m2/year u Designates Ultra Low Permeation Limit 4.3 Coupling Integrity Coupling Integrity tests the ability of both the hose and the crim

36、ped fitting (coupling) to meet the following acceptance criteria. SAE J3062 ensures that the specific manufacturers hose can be successfully coupled to a fitting. It is the hose couplers responsibility to ensure that the combination of coupling type and specific Hose Manufacturers Hose Material will

37、 meet the following acceptance criteria at all possible combinations of dimensional tolerances. 4.3.1 Test Specimens Six coupled assemblies shall have 76 mm 3 mm of exposed hose and 56 mm 8 mm of straight tubing between the couplings with suitable connector and sealed at the other (pinch-welding per

38、mitted). Each assembly is attached to a canister with a minimum internal volume of 900 cm3and equipped with a charging fitting. The minimum canister volume ensures a maximum pressure loss of 0.10 MPa between recharges. A seventh coupled assembly is used as a volatility sample to account for weight l

39、osses not associated with refrigerant losses. SAE INTERNATIONAL J2064 AUG2015 Page 5 of 9 4.3.2 Test Procedure with the Appropriate Refrigerant 4.3.2.1 Charging Calculate the internal volume of the hose and canister assembly. Charge the canister assembly with an amount of refrigerant compatible lubr

40、icant equivalent to half of the internal volume of the hose assembly. Calculate the charge weight of refrigerant by multiplying the system volume less the lubricant volume by using the table below. Evacuate the sample, without removing the lubricant, and add the charge weight 1 g of refrigerant and

41、record original weight. Check all fittings to ensure against extraneous refrigerant leakage. After charging, agitate the assembly to insure mixing with the lubricant and wetting of all internal surfaces. Hoses need to be dry to obtain accurate weighings. All weighings are to be made at 18 to 29 C to

42、 the nearest 0.01 g. Table 3 - Charge density Temperature deg C Pressure MPa Density g/cm3 R134a 125 2.07 0.0783 HFO1234yf 125 2.07 0.085Example: Hose Assembly Volume 19.8 cm3 Canister Volume 1260 cm3 Lubricant Volume = (Hose Assembly Volume) / 2 = 9.9 cm3 Charge Weight = (Canister Volume + Hose Ass

43、embly Volume - Lubricant Volume) x 0.0783 g/cm3 = (1260 cm3+ 19.8 cm3- 9.9 cm3) x 0.0783 g/cm3 = 1269.9 cm3x 0.0783 g/cm3 = 99.4 g 4.3.2.2 Test Exposure The assembly shall be oriented such that the liquid phase will always drain into the test coupling assembly. The test shall include four exposure i

44、ntervals with Test Option 1 or six exposure intervals with Test Option 2, each followed by a leakage evaluation and possible recharging before the next exposure. Test Option 1 - The four exposure intervals in sequential order are as follows: a. Exposure 1 - 96 h at 125 C 2 C with canister pressure a

45、t 2.07 MPa. b. Exposure 2 - 48 h thermal cycling from -30 to 125 C in a timer-controlled chamber. The chamber temperature shall change every 4 h and canisters shall reach the desired temperature within 3 h after a temperature change. c. Exposure 3 - 96 h at 125 C 2 C with canister pressure at 2.07 M

46、Pa. d. Exposure 4 - 48 h thermal cycling from -30 to 125 C in a timer-controlled chamber. The chamber temperature shall change every 4 h and canisters shall reach the desired temperature within 3 h after a temperature change. Test Option 2 - The six exposure intervals in sequential order are as foll

47、ows: a. Exposure 1 - 96 h at 121 C 2 C with canister pressure at 2.0 MPa. b. Exposure 2 - 48 h at -29 to 121 C in a timer-controlled chamber. The chamber temperature shall change every 4 h and canisters shall reach the desired temperature within 3 h after a temperature change. c. Exposure 3 - 96 h a

48、t 121 C 2 C with canister pressure at 2.0 MPa. d. Exposure 4 - 48 h at -29 to 121 C in a timer-controlled chamber. The chamber temperature shall change every 4 h and canisters shall reach the desired temperature within 3 h after a temperature change. SAE INTERNATIONAL J2064 AUG2015 Page 6 of 9 e. Ex

49、posure 5 - 96 h at 121 C 2 C with canister pressure at 2.0 MPa. f. Exposure 6 - 48 h at -29 to 121 C in a timer-controlled chamber. The chamber temperature shall change every 4 h and canisters shall reach the desired temperature within 3 h after a temperature change. 4.3.2.3 Leakage Evaluation At the end of each exposure interval, as soon as a canister assembly reaches