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UL 330A-2019 pdf free download
UL 330A-2019 pdf free download.Hose and Hose Assemblies for Use With Dispensing Devices Dispensing Gasoline and Gasoline/Ethanol Blends With Nominal Ethanol Concentrations Up To 85 Percent (EQ — E85).
recorded and the total mass loss of fuel shall be checked to determine whether it is anticipated that the fuel loss will exceed 5 percent prior to the next weighing.
16,7.6 When, during periodic weighings, it is anticipated that fuel loss will exceed 5 percent before the next weighing, the assembly shall be emptied of fuel. refilled with the test fuel volume of fresh CE-iC, capped. recoiled and weighed. It shall then be returned to the 3&C chamber. The time arid date that the refilled assembly was returned to the chamber. and the mass of the refilled assembly shall be recorded. This procedure shall be accomplished such that the assembly is returned to the test chamber within 1 hour of its removal.
16.7.7 When a hose assembly reaches steady state permeation as defined in testing of that hose assembly shall be terminated. The permeation test shall be considered completed when all five filled hose assemblies have reached steady state permeation.
16.7.8 II at any time during the permeation test the permeation rate for a hose assembly is greater than
15.0 g/m/day for three consecutive data points, and all test parameters, such as test chamber temperature are within specifications, the testing of the assembly shall be terminated and the assembly shall be considered to not meet the permeation limit set in 16.1.1.
16.8 Steady state criteria
16.8.1 The mass loss rate and the moving average mass loss at each weighing shall be calculated using the procedure in 16.8.2. Steady state permeation shall be determined using the criteria in 16.8.3.
16.8.2 Procedure for calculating mass loss rate and 2-datapoint moving average mass loss shall be as follows:
a) The mass loss at each weighing shall be calculated for each hose assembly by subtracting the current recorded mass from the mass recorded for the immediately previous weighing. In the event the fuel has been refreshed as described in 167.6. mass loss shall be calculated by subtracting the current recorded mass from the immediately previous refreshed mass;
b) An adjusted mass loss shall be catculated by subtracting the mass loss for the unfilled hose assembly (the blank) from the mass loss of each of the filled assemblies:
c) The mass loss rate in g/m2/day shall be calculated by dividing the adjusted mass loss by the permeation surface area of the hose and by the number of elapsed days since the previous mass loss recording: and
d) After two mass loss rates have been calculated and for each succeeding mass loss rate datapoint. the 2-datapoint moving average of these mass loss rates shall be calculated by averaging the current and immediately previous mass loss rates.UL 330A-2019 pdf free download.
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