SAE J2064_200512

This SAE Standard covers hose and hose assemblies intended for conducting liquid and gaseous R134a refrigerant in automotive air-conditioning systems. The hose shall be designed to minimize permeation of R134a refrigerant, contamination of the system, and to be functional over a temperature range of –30 °C to 125 °C. Specific construction details are to be agreed upon between user and supplier. A hose marked “J2064” signifies that it has been coupled, tested, and has met the requirements of SAE J2064. It is the hose assembly manufacturer’s responsibility to see that the assemblies meet the specified acceptance criteria for this specification. Changes made to this document include: Moved Table 1 from section 3.2.4 to section 5.2.4 - (Table applies to this section). Renamed section 5.1 from Test Conditions to Sample Conditioning (samples are being conditioned). Clarified Section 5.1. The temperature of the testing room shall be maintained at 23 °C ± 2 °C. The temperature of the test hose or hose assemblies shall be stabilized for 24 h at the testing room temperature prior to testing. Charged Samples shall be stabilized for 24 hrs. @ 23 °C ± 2 °C prior to testing. Samples shall be checked to ensure specified charge and identify charge loss. Section 5.2.2 Charging Procedure and Initial Weights - add evacuation to the test procedure. (is currently a common practice) Section 5.2.4 Establish Constant Loss Rate - replaced exposures with exposure (corrected grammar) Section 5.2.4 Establish Constant Loss Rate - replaced taken with reported (corrected grammar) Section 5.2.4 Establish Constant Loss Rate - Deleted This is not to be a lot release test. The lot release test is to be agreed upon between the vendor and consumer. (redundant) Section 5.2.5 Loss Rate Determination - Deleted section title 5.2.6 and added the exact wording for the acceptance determination under Section 5.2.5 (corrected mislabeled section numbering). Section 5.3 Coupling Integrity - Deleted Either Test Option 1 or Test Option 2 may be used. (redundant). Section 5.3 Coupling Integrity - Deleted Each assembly is attached to a canister having an internal volume of 1260 cm3 ± 25 cm3 and equipped with a charging fitting. Replaced with Each assembly is attached to a canister with a minimum internal volume of 900 cm3 and 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 losses not associated with refrigerant losses.