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/J3062_201506 SURFACE VEHICLE STANDARD J3062 JUN2015 Issued 2015-06 Automotive Re
5、frigerant Air-Conditioning Hose Requirements 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. These requirements are to be used for all bulk hose as of the rel
6、ease date of this standard. 1. SCOPE The Scope of SAE J3062 covers hose intended for containing and circulating lubricant, liquid and gaseous R134a and/or R-1234yf refrigerant in automotive air-conditioning systems. The hose shall be designed to minimize permeation of the refrigerant, contamination
7、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 the user and supplier. Requirements for the hose used in coupled automotive refrigerant air-conditioning assemblies had been included in SAE J2064. SAE J3062 sepa
8、rates requirements for the hose used in these assemblies into its own standard. SAE J2064 also provides the necessary values used in SAE J2727 Mobile Air-Conditioning System Refrigerant Emission charts for R-134a and R-1234yf. Mobile air-conditioning system refrigerant emissions rates are establishe
9、d in SAE J2727 Emission charts and are important. The certified coupling of MAC hose assemblies is required in meeting certain regulatory requirements. Therefore, the Scope of SAE J2064 has been changed to establish the assembly requirements for factory and field coupled hose assemblies. A hose whic
10、h meets the requirements of SAE J3062 may not meet the requirements of SAE J2064. 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 thi
11、s specification to the extent specified herein. Unless otherwise indicated, 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 (outs
12、ide USA), www.sae.org. SAE J639 Safety Standards for Motor Vehicle Refrigerant Vapor Compression Systems SAE J2064 Coupled Automotive Refrigerant Air-Conditioning Hose Assembly Requirements SAE INTERNATIONAL J3062 Issued JUN2015 Page 2 of 15 SAE J2727 Mobile Air-Conditioning System Refrigerant Emiss
13、ion Charts for R-134a and R-1234yf SAE J2911 Procedure for Certification that Requirements for Mobile Air-Conditioning System Components, Service Equipment, and Service Technician Training Meet SAE J Standards. 2.1.2 ASTM Publication Available from ASTM International, 100 Barr Harbor Drive, P.O. Box
14、 C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org ASTM D 380 Methods of Testing Rubber Hose 3. MANUFACTURE 3.1 Size Standard dimensions are given in the first column of Table 1. Other sizes are permitted as long as section 4.1 Bulk Hose Identification is satisfied. 3.2 Types I
15、ncluding, but not limited to the following: 3.2.1 Type A - Elastomeric, Textile Reinforced The hose shall be built having a suitable seamless synthetic elastomeric tube. The reinforcement shall consist of textile yarn, cord, or fabric adhered to the tube and cover. The outer cover shall be heat- and
16、 ozone-resistant synthetic elastomer. 3.2.2 Type B - Elastomeric, Wire Reinforced The hose shall be built having a suitable seamless synthetic elastomeric tube. The reinforcement shall consist of steel wire adhered to the elastomeric tube. The cover shall consist of a heat-resistant textile yarn imp
17、regnated with a synthetic elastomeric cement. 3.2.3 Type C - Barrier, Textile Reinforced The hose shall have a suitable thermoplastic barrier between elastomeric layers. The reinforcement shall consist of suitable textile yarn, cord, or fabric adhered to the tube and cover. The outer cover shall be
18、heat- and ozone-resistant synthetic elastomer. 3.2.4 Type D - Thermoplastic, Textile Reinforced, Elastomeric Cover The hose shall have a suitable thermoplastic tube. The reinforcement shall consist of a suitable textile yarn, cord, or fabric adhered to the tube and cover. The outer cover shall be he
19、at- and ozone-resistant synthetic elastomer. 3.2.5 Type E - Veneer, Textile Reinforced The hose shall have a suitable thermoplastic veneer lining the inside diameter with an elastomeric tube outer layer. The reinforcement shall consist of a textile yarn, cord, or fabric adhered to the tube and cover
20、. The cover shall be heat- and ozone-resistant synthetic elastomer. 3.2.6 Type F - Veneer, Barrier, Thermoplastic Liner The hose shall have a suitable thermoplastic veneer liner with a thermoplastic barrier between elastomeric layers. The reinforcement shall consist of a suitable textile yarn, cord,
21、 or fabric adhered to the tube and cover. The cover shall be heat- and ozone-resistant elastomer. SAE INTERNATIONAL J3062 Issued JUN2015 Page 3 of 15 3.3 Moisture Vapor Ingression Hose Classes The following classes are established based upon hose material configuration. Class I - Not greater than 0.
22、039 g/cm2/year Class II - Not greater than 0.111 g/cm2/year 4. HOSE IDENTIFICATION 4.1 Bulk Hose Identification The hose shall be identified with the SAE number, refrigerant, type, class, and size of inside diameter in fraction of inches and/or metric millimeter equivalents, and hose manufacturers c
23、ode marking. This marking shall appear on the outer cover of the hose at intervals not greater than 380 mm. 4.2 Hose Identification A hose marked “J3062 - R134a”, “J3062 - R-1234yf” or “J3062 - R134a/R-1234yf” signifies that it has been tested and meets the requirements of SAE J3062 for the marked r
24、efrigerant(s). 5. TESTING The test procedures described in the current issue of ASTM D 380 shall be followed whenever applicable. 5.1 Sample Conditioning Charged Samples shall be stabilized for 24 h at 23 2 C prior to testing. Samples shall be checked to ensure specified charge and identify charge l
25、oss. 5.2 Permeation Test 5.2.1 Test Specimens - 107 cm Samples The test specimens are to consist of four coupled hose assemblies that have 107 cm minimum of exposed hose between couplings. Three of the coupled hose assemblies are to be used for determining the permeation rate through the hose at a s
26、pecific 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 canister is used, the coupled hose
27、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. 5.2.2 Charging Procedure and Initial Weights The coupled hose assemblies are to be weighed and recorded to 0.01 g to establish an initial weight prior to chargi
28、ng. 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. 5.2.3 Temperature Exposure The test temperature is 80 2 C. 5.2.4 Establish
29、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. The net weight loss versus time
30、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. SAE INTERNATIONAL J3062 Issued JUN2015 Page 4 of 15 5.2.5 Loss Rate Determination No charged specimen may los
31、e more than 40 g during 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 permeat
32、ion rate. b. For Samples 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
33、weight loss for the final 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 t
34、est, the refrigerant charge in each specimen shall be exhausted to a suitable reclamation container. 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) 8.1 (0.320) 13.414 2.748
35、 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: D = Inner Diameter (
36、mm) for lb/ft2/year, Factor = 0.877/D where: D = Inner Diameter (inches) 5.2.6 Acceptance Determination The hose shall not be permeable to a refrigerant loss at a rate greater than those listed in Table 1A below. Table 1A - Permeation limits Refrigerant Hose Type R-134a R-1234yf A, B 15 kg/m2/year 1
37、8 kg/m2/year C, D, E, F Cu,Du, Eu, Fu 5 kg/m2/year 1.5 kg/m2/year 5 kg/m2/year 1.5 kg/m2/year u Designates Ultra Low Permeation Limit SAE INTERNATIONAL J3062 Issued JUN2015 Page 5 of 15 5.3 Coupling Integrity Coupling Integrity tests the ability of both the hose and the crimped fitting (coupling) to
38、 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 per SAE J2064 to ensure that the combination of their coupling type and crimp details along with a SAE J3062 approved hose
39、will meet the same acceptance criteria at all possible combinations of dimensional tolerances. 5.3.1 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 perm
40、itted). 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 lo
41、sses not associated with refrigerant losses. 5.3.2 Test Procedure with the Appropriate Refrigerant 5.3.2.1 Charging Calculate the internal volume of the hose and canister assembly. Charge the canister assembly with an amount of refrigerant compatible lubricant equivalent to half of the internal volu
42、me 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 record original weight. Check all fittings to
43、 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 the nearest 0.01 g. Table 3 - Charge density
44、 Temperature deg C Pressure MPa Density g/cm3 R134a 125 2.07 0.0783 HFO1234yf 125 2.07 0.085 Example: Hose Assembly Volume 19.8 cm3 Canister Volume 1260 cm3 Lubricant Volume = (Hose Assembly Volume) / 2 = 9.9 cm3 Charge Weight = (Canister Volume + Hose Assembly Volume - Lubricant Volume) x 0.0783 g/
45、cm3 = (1260 cm3+ 19.8 cm3- 9.9 cm3) x 0.0783 g/cm3 = 1269.9 cm3x 0.0783 g/cm3 = 99.4 g SAE INTERNATIONAL J3062 Issued JUN2015 Page 6 of 15 5.3.2.2 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 ex
46、posure intervals 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 2 C with canister pres
47、sure at 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 2 C with canister pressure at 2.
48、07 MPa. 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
49、follows: a. Exposure 1 - 96 h at 121 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 at 121 2 C with canister pressure at 2.0 MPa. d. Exposure 4 - 48 h at -29 to 121 C in a timer-cont
