SAE J2197-1997 HFC-134a (R-134a) 汽车空调维修设备用软管接头

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Copyright 1997 Society of Automotive Engineers, Inc.1.2Due to similarities between English and metric thread sizes a single, unique ACME thread fitting is specified.

This fitting was recommended by the Compressed Gas Association (CGA), Connection Standards Committee Task Force as one which could be qualified to meet their requirements for use and safety in a time frame consistent with the introduction of R-134a. It was selected because its unique design would reduce the likelihood of cross-treading service hoses on R-12/R-134a refrigerant storage containers and service equipment.

1.3The high and low pressure hose in SAE J2196 requires the charge coupling (used to connect service hoses to

vehicle access ports) to be an integral part of the hose assembly. To allow removal of the hose from the coupling for hose replacement only, a two-piece construction with a wrench tight connection is permitted.

Specifications covering this fitting are provided.

2.References

2.1Applicable Publications—The following publications form a part of this specification to the extent specified

herein. The latest issue of SAE Publications shall apply.

2.1.1SAE P UBLICATIONS—Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.

SAE J639—Vehicle Service Coupling

SAE J2196—Service Hose for Automotive Air conditioning

SAE J2210—HFC-134a Recycling Equipment for Mobile Air-Conditioning Systems

2.1.2ARI P UBLICATION—Available from Air Conditioning and Refrigeration Institute, 1501 Wilson Boulevard, Sixth

Floor, Arlington, VA 22209.

ARI 720—Refrigerant Access Valves and Hose Connectors

3.Specification and Application Description

3.10.500 in x 16-2G ACME—Right Hand Thread, Cylinder Valve Outlet Connection—Compressed Gas Asso-

ciation, Inc. Connection No. 167. (Figure 2)

3.1.1The Connection shall be used on all R-134a refrigerant storage containers liquid and vapor outlet

connections. It will also be used for all R-134a service equipment including manifold gauge hose connections, utility hose connection to the vacuum pump, and charging, recovery and recycling equipment as defined in SAE J2210.

3.1.2Applications which will require the use of valve cores should locate the valve core in accordance with ARI

720.

3.2M14 x 1.5-6G right hand thread, SAE Hose Barb connection. (Figure 3)

3.2.1This fitting may be used as an option to a nonserviceable connection of the charge coupling to the service

hose assembly and will require a secure, wrench tight connection.

4.Functional Description

4.1The high-pressure hose assembly shall meet SAE J2196 requirements and will be terminated at one end with

the 0.500 in x 16 – ACME threaded nut. The other end will be permanently attached to the SAE J639 service charge coupling or terminated with the optional M14 x 1.5-6G external thread/male hose barb fitting.

FIGURE 2—0.500 in—16-ACME-2G-RH-EXT

FIGURE 3—SAE HOSE BARB R-134a SERVICE ADAPTER4.2The low-pressure hose assembly shall meet SAE J2196 requirements and will be terminated at one end with

the 0.500 in x 16 – ACME threaded nut. The other end will be permanently attached to the SAE J639 service charge coupling or terminated with the optional M14 x 1.5-6G external thread/male hose barb fitting.

4.3The utility hose shall meet SAE J2196 requirements and will be terminated at both ends using 0.500 in x 16 –

ACME threaded nut.

4.3.1Utility hose used on four hose gauge systems should conform to requirements.

4.4Manifold Gauge Assembly shall require three or four 0.500 in x 16 – ACME male threaded connections.

4.5Containers disposable or refillable shall require 0.500 in x 16 – ACME male threaded connections with shut off

valves.

4.6Refrigerant recovery, charging stations, and stand-alone vacuum pumps shall require 0.500 in x 16 – ACME

male threaded connection unless an internal, nonserviceable connection is made by the equipment manufacturer.

4.7High- and low-pressure charge couplings shall be constructed with an internal, M14 x 1.5-6H right-hand thread

connection as an option to attaching the hose assembly with a nonserviceable connection. (Figure 4)

FIGURE 4—SAE SPUD R-134a SERVICE ADAPTER

5.Testing—This test procedure is for the qualification of new connection for R-134a automotive air-conditioning

system service equipment.

5.1Determine the minimum torque necessary for a gas tight shutoff between the nipple and valve body at a gas

pressure equal to the maximum rated working pressure per SAE J2196. For cycling purposes, twice this shutoff torque will be used to simulate normally applied field torque.

5.2Cycling is to be conducted at atmospheric pressure, since that is the pressure at which connections are

normally made.5.3Before and after cycling, measurements of the connection shall be recorded (such as threaded elements,

nipple bore diameters, and any other dimensions that may be subject to change) due to repeated tightenings.

5.4Each connection is to be cycled 500 times with tightening to the torque determined in 5.1. One cycle consists

of tightening to the predetermined torque and then loosening to at most finger tight.

5.5After each 100 cycles, the torque required to achieve gas tight shutoff at test pressure shall be recorded to

determine if there is any abnormal torque buildup in shutoff requirements. The measurements indicated in 5.3 shall also be recorded at this interval to determine if there is any abnormal deformation of parts.

5.6Each connection shall be subjected to a hydrostatic test and must withstand a pressure of a least 4 times the

maximum rated working pressure per SAE J2196 without structure failure.

5.7After completion of the previous tests, the results will be recorded on a suitable test report form which will be

kept on file at the Compressed Gas Association office.

5.7.1Testing of either a left-hand or right-hand connection of identical design (except for thread direction)

automatically qualifies the untested connection of the opposite thread direction. (The direction of the thread does not effect the structural integrity of the design.)

PREPARED BY THE SAE INTERIOR CLIMATE CONTROL STANDARDS COMMITTEERationale—Not applicable.

Relationship of SAE Standard to ISO Standard—Not applicable.

Application—This specification covers fittings intended for connecting service hoses, per SAE J2196, from Mobile Air-Conditioning Systems to service equipment such as manifold gauges, vacuum pumps, and air-conditioning charging, recovery and recycling equipment.

Reference Section

SAE J639—Vehicle Service Coupling

SAE J2196—Service Hose for Automotive Air Conditioning

SAE J2210—HFC-134a Recycling Equipment for Mobile Air-Conditioning Systems

ARI 720—Refrigerant Access Valves and Hose Connectors

Developed by the SAE Interior Climate Control Standards Committee