CSA/AM ANSI/CSA HGV 4.4-2013

Abstract

This standard contains safety requirements for the design, manufacture and testing of fueling hose breakaway devices for use in hydrogen gas fueling applications , hereinafter referred to as devices. This standard applies to newly manufactured devices. <br>This standard does not apply to: <br>a. Residential Fueling Facility and/or Vehicle Fueling Appliances for hydrogen gas vehicles. <br>b. Dispenser Breakaway Devices (Shear Valves) <br>c. Vehicular Breakaway Components <br>Devices covered by this standard are intended to perform the following functions when a vehicle is driven off with the nozzle attached to the vehicle's fueling receptacle. <br>a. Minimize the escape of gaseous hydrogen by automatically shutting off the flow of gas from the dispenser and controlling the depressurization of the hose; and <br>b. Minimize damage to the vehicle and dispenser. <br>All dimensions used in this standard are in metric units [International System of Units (SI)], unless otherwise specified. If a value for a measurement, as given in this standard, is followed by an equivalent value in other units, the first stated is to be regarded as the specification. <br>All references to pressure throughout this document are to be considered gauge pressures unless otherwise specified. <br>Except as otherwise stated, testing at room temperature will be conducted between 15&#176;C (59&#176;F) minimum and 30&#176;C (86&#176;F) maximum.