ANSI HGV 3.1-2015 pdf free download

ANSI HGV 3.1-2015 pdf free download.Fuel system components for compressed hydrogen gas powered vehicles.
1.4 This Standard does not apply to the following: a) hydrogen gas fuel system components incorporated during the manufacture of motor vehicles originally manufactured in compliance with the Federal Motor Vehicle Safety Standards (FMVSS) for Compressed Hydrogen Gas Fueled Vehicles and the Canadian Motor Vehicle Safety Standard (CMVSS); b) fuel containers; c) stationary gas engines; d) container mounting hardware; e) electronic fuel management; f) refueling receptacles; or g) three-way valves. 1.5 In the case of conflict between this Standard and Federal, Provincial, State, or Local requirements, the government requirements take precedence. 1.6 In this Standard, “shall” is used to express a requirement, i.e., a provision that the user shall satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. 1.7 This Standard contains SI (Metric) units corresponding to the yard/pound quantities, the purpose being to allow the standard to be used in SI (Metric) units. If a value for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate.
3 Definitions The following definitions shall apply in this Standard: Bypass flow — the flow through an excess flow valve in its closed or low-flow position. Compressed hydrogen gas — hydrogen gas that has been compressed and stored for use as a vehicle fuel and that meets the gas composition requirements specified in SAE J2719 or ISO 14687-2. Discharge line — components attached to the exhaust port of pressure relief devices or pressure relief valves or other devices releasing gas. Discharge line closure — a device used to keep contamination out of a discharge line while still permitting escape of gas from the line to atmosphere. Duty cycle — one complete operation of the component such as pressurization and depressurization or on and off as applicable. Injector duty cycle — the operating frequency of an injector as specified by the manufacturer. Filter housing — an assembly that contains a filter media that is intended to remove contaminants from the gas stream. Fitting — connector used to join sections of pipe, tube, hose, or components. Flexible fuel line — non-rigid tubing or hose through which hydrogen gas flows. Note: A line that is capable of passing a kink resistance test is considered a flexible line. Gas/air mixer — a device for mixing the gaseous fuel and the intake air for the engine. Note: This does not include fuel injectors. Gas flow adjuster — a gas flow restricting device, installed downstream of a pressure regulator, controlling gas flow to the engine, either at a fixed setting or in relation to overall engine fuel demand. Note: This does not include fuel injectors or devices that respond to individual cylinder firing events. Gas injector — a solenoid operating valve used to control flow into the engine or associated intake that is activated with each engine cylinder cycle. Direct gas injector — a gas injector that introduces fuel directly into the combustion chamber. Intake gas injector — a gas injector that introduces fuel upstream of the combustion chamber. Gas-tight housing