CSA ANSI NGV 4.1-2018 pdf free download – Natural gas vehicle (NGV) dispensing systems
Fitting – an item in a piping or tubing system that is used as a connector, such as an elbow, returnbend, tee, union, bushing, coupling, cross, or nipple, but not including such functioning items as a valveor pressure regulator.
Fueling station – see Station.
GGE – see Gasoline gallon equivalent.
Gasoline gallon equivalent (GGE)- 1GGE is 123.55 scf of mean natural gas.(USA) 1 GGE equals 5.660 lbs.Of Natural Gas.
(Canada) 1 kilogram NG equals 1.5 liters of gasoline.Hose – a flexible conduit.
Hose breakaway device – a component installed downstream of the dispenser outlet connection toprotect the dispenser assembly from damage by vehicles driving away while still connected to thedispenser nozzle.
Housing — a section of the system that encloses, and is intended to protect, operating parts, controlmechanisms, or other components, that need not be accessible during normal operation.
Hydrostatic pressure – the hydraulic pressure to which a component is subjected during testing.Hydrostatic test =- the hydraulic pressure to which a component is taken during acceptance testing.Kiosk – a structure having an area of less than 9.24 m?(100 ft2′) located on a remote dispenser island,which provides shelter and contains the necessary equipment to permit a person to perform theirduties and is not considered a building-
Listed —equipment or materials included in a list published by an organization acceptable to theauthority having jurisdiction and concerned with product evaluation that maintains periodic inspectionof production of listed equipment or materials and whose listing states either that the equipment ormaterials meets appropriate standards or has been tested and found suitable for use in a specifiedmanner.
Manufacturer – the person or organization responsible for the design, fabrication, and testing of theequipment and components.
Maximum allowable working pressure — the maximum pressure to which a component is designed tobe subjected when handling the specified fluid at the maximum specified temperature.
NGV 一 as used in this Standard, NGv indicates a natural gas vehicle. (In the United States of America,the term NGv is frequently applied to the natural gas vehicle, i.e., the mobile unit itself rather than thefuel.)
Natural Gas stored in a gaseous state to be used as engine fuel for a highway vehicle.Nozzle –
Type 1 — a nozzle for use with a dispensing hose that may remain fully pressurized at dispensershutdown.The nozzle is to be equipped with an integral valve or valves incorporating an operatingmechanism that first stops the supply of gas and safely vents the trapped gas before allowing thedisconnection of the nozzle from the receptacle. The operating mechanism functions to open the vent valve before the release mechanism can be operated and the gas located between the nozzleshut-off valve and the receptacle check valve is safely vented prior to nozzle disconnection.
Type 2 – a nozzle for use with a dispensing hose that remains fully pressurized at dispenser
shutdown. A three-way valve connected to the inlet of the nozzle is required to safely vent trappecgas prior to nozzle disconnection. With a Type 2 nozzle, the vent valve operating mechanism isexternal to the nozzle.
Type 3 – a nozzle for use with a dispensing hose that automatically depressurizes [517 kPa (75 psiand below] at dispenser shutdown.
Class A – this class specifies high frequency use, with a cycle life of 100,000 cycles.Class B – this class specifies low frequency use, with a cycle life of 20,000 cycles.Pressure – expressed as psi, kPa, or bar.
High pressure — in the NGv context,4 bar (60 psi) or greater.
Service pressure — the settled pressure at a uniform gas temperature of 21 °C(70°F) when thevehicle fuel container is fully charged with gas. This Standard defines standard pressure of
101.325 kPa (14.696 psi) at 288.15 K (15.00 °C, 59.00°F).This pressure may be 2400,3000, or3600 psi. Alternatively, pressure may be 200 bar or 240 bar at a uniform gas temperature of 15 °℃.Test pressure – the pressure to which a component or equipment is taken during testing.
Pressure relief device (PRD)一 a one-time use device, triggered by excessive temperature and/orpressure, which vents gas to protect the cylinder from rupture.
Pressure relief valve — a device that prevents a pre-determined upstream pressure from beingexceeded.CSA ANSI NGV 4.1 pdf download.