Document ID: chunk:federal_register_of_legislation:F2023L01530:body:0:p42
Version: federal_register_of_legislation:F2023L01530
Segment Type: other
Provision Reference: 
Character Range: 118880–121868

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.
              (b) After exposure to each chemical, the component is wiped off and rinsed with water;
              (c) 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. At the conclusion of all exposures, the unit(s) shall comply with the requirements of the ambient temperature leakage test (Annex 4, paragraph 2.2.) and Hydrostatic Strength Test (Annex 4, paragraph 2.1.).
         2.6. Atmospheric exposure test
         The atmospheric exposure test applies to qualification of check valve and automatic shut-off valves if the component has non-metallic materials exposed to the atmosphere during normal operating conditions.
              (a) All non-metallic materials that provide a fuel containing seal, and that are exposed to the atmosphere, for which a satisfactory declaration of properties is not submitted by the applicant, shall not crack or show visible evidence of deterioration after exposure to oxygen for 96 hours at 70 °C at 2 MPa in accordance with ASTM D572 (Standard Test Method for Rubber- Deterioration by Heat and Oxygen);
              (b) All elastomers shall demonstrate resistance to ozone by one or more of the following:
                  (i) Specification of elastomer compounds with established resistance to ozone;
                  (ii) Component testing in accordance with ISO 1431/1, ASTM D1149, or equivalent test methods.
         2.7. Electrical Tests
         The electrical tests apply to qualification of the automatic shut-off valve; they do not apply to qualification of check valves.
              (a) Abnormal voltage test. The solenoid valve is connected to a variable DC voltage source. The solenoid valve is operated as follows:
                  (i) An equilibrium (steady state temperature) hold is established for one hour at 1.5 times the rated voltage;
                  (ii) The voltage is increased to two times the rated voltage or 60 volts, whichever is less, and held for one minute;
                  (iii) Any failure shall not result in external leakage, open valve or unsafe conditions such as smoke, fire or melting.
              The minimum opening voltage at NWP and room temperature shall be less than or equal to 9 V for a 12 V system and less than or equal to 18 V for a 24 V system.
              (b) Insulation resistance test. 1,000 V D.C. is applied between the power conductor and the component casing for at least two seconds. The minimum allowable resistance for that component is 240 kΩ.
         2.8. Vibration test
         The valve unit is pressurized to its 100 per cent NWP (+2/-0 MPa) with hydrogen, sealed at