Overview
This standard was developed after the hydrogen gas industry demonstrated the need for safety guidelines for breakaway devices used for dispensing hoses and systems. ANSI/CSA HGV 4.4-2013 - Breakaway Devices for Compressed Hydrogen Dispensing Hoses and Systems establishes performance-based requirements for safe operations, substantial & durable construction, and performance testing of fueling hose breakaway devices for use in hydrogen gas fueling applications.
Highlights of ANSI/CSA HGV 4.4-2013 Include:
When a vehicle drives off with the nozzle attached to the vehicle’s fueling receptacle, devices covered under this standard should:
- Minimize the escape of gaseous hydrogen by automatically shutting off the flow of gas from the dispenser and controlling the depressurization of the hose
- Minimize damage to the vehicle and dispenser
Preface
This publication represents a standard for safe operation, substantial and durable construction and performance testing of fueling hose breakaway devices for use in hydrogen gas fueling applications.
Scope
1.1.1
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.
1.1.2
This Standard does not apply to:
a. Residential Fueling Facility and/or Vehicle Fueling Appliances for hydrogen gas vehicles.
b. Dispenser Breakaway Devices (Shear Valves)
c. Vehicular Breakaway Components
1.1.3
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.
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
b. Minimize damage to the vehicle and dispenser
1.1.4
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.
1.1.5
All references to pressure throughout this document are to be considered gauge pressures unless otherwise specified.
1.1.6
Except as otherwise stated, testing at room temperature will be conducted between 15°C (59°F) minimum and 30°C (86°F) maximum.
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