Document ID: chunk:federal_register_of_legislation:F2023L01530:body:0:p41
Version: federal_register_of_legislation:F2023L01530
Segment Type: other
Provision Reference: 
Character Range: 116191–119101

At the completion of the 85 oC cycles, the unit shall comply with the high temperature (85 °C) leak test specified in Annex 4, paragraph 2.2.;
                  (iii) Low temperature cycling. The unit then undergoes operational cycles at 100 per cent NWP (+2/-0 MPa) through 5 per cent of the total cycles with the part stabilized at -40 °C or lower. At the completion of the -40 °C operational cycles, the unit shall comply with the low temperature (-40 °C) leak test specified in Annex 4, paragraph 2.2.
              (c) Check valve chatter flow test: Following 11,000 operational cycles and leak tests in Annex 4, paragraph 2.3.(b), the check valve is subjected to 24 hours of chatter flow at a flow rate that causes the most chatter (valve flutter). At the completion of the test the check valve shall comply with the ambient temperature leak test (Annex 4, paragraph 2.2.) and the strength test (Annex 4, paragraph 2.1.).
         2.4. Salt corrosion resistance test
         The component is supported in its normally installed position and exposed for 500 hours to a salt spray (fog) test as specified in ASTM B117 (Standard Practice for Operating Salt Spray (Fog) Apparatus). The temperature within the fog chamber is maintained at 30 — 35 °C). The saline solution consists of 5 per cent sodium chloride and 95 per cent distilled water, by weight.
         Immediately after the corrosion test, the sample is rinsed and gently cleaned of salt deposits, examined for distortion, and then shall comply with the requirements of:
              (a) The component shall not show signs of physical degradation that could impair the function of the component, specifically: cracking, softening or swelling.  Cosmetic changes such as pitting or staining are not failures;
              (b) The ambient temperature leak test (Annex 4, paragraph 2.2.);
              (c) The hydrostatic strength test (Annex 4, paragraph 2.1.).
         2.5. Vehicle environment test
         Resistance to degradation by exposure to automotive fluids is determined by the following test.
              (a) The inlet and outlet connections of the valve unit are connected or capped in accordance with the manufacturers installation instructions. The external surfaces of the valve unit are exposed for 24 hours at 20 (±5) °C to each of the following fluids:
                  (i) Sulphuric acid -19 per cent solution by volume in water;
                  (ii) Sodium hydroxide -25 per cent solution by weight in water;
                  (iii) Ammonium nitrate -28 per cent by weight in water; and
                  (iv) Windshield washer fluid (50 per cent by volume methyl alcohol and water).
              The fluids are replenished as needed to ensure complete exposure for the duration of the test. A distinct test is performed with each of the fluids. One component may be used for exposure to all of the fluids in sequence.