AS 19880.3:2020 pdf Gaseous hydrogen — Fuelling stations Part 3: Valves (ISO 19880-3:2018, MOD)
1 Scope
This document provides the requirements and test methods for the safety performance of high pressure gas valves that are used in gaseous hydrogen stations of up to the H70 designation.
This document covers the following gas valves:
一check valve;
一excess flow valve;
一flow control valve;
一hose breakaway device;
一manual valve;
一pressure safety valve;
一 shut-off valve.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60079-0, Explosive atmospheres – Part 0: Equipment – General requirements
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
一IEC Electropedia: available at http:// www.electropedia.org/
ISO Online browsing platform: available at https://www.iso.org/obp
3.1 allowable temperature range
minimum and maximum temperatures for which the manufacturer has designed the equipment [or any part to which the term is referred) when handling the specified fluid at the specified pressure
3.2 component pressure rating
maximum allowable pressure at which it is permissible to operate a component as specified by the
manufacturer at a specified temperature
Note 1 to entry: Further guidance on dispenser pressure terminology is found in ISO 19880-1.
3.3 Cv value
<flow coefficient> coefficient to represent the flow rate of fluid that a valve is capable of handling
Note 1 to entry: Cv is the flow coefficient of a valve with the fluid at 15,56 °C under a pressure difference of 6894 N/m2.
Note 2 to entry: There are different types of flow coefficients including Cv, Kv and Av.
3.4 dispenser
system downstream of the hydrogen supply system comprising all equipment necessary to carry out
the vehicle fuelling operation, through which the compressed hydrogen is supplied to the vehicle
Note 1 to entry: As an example, the dispenser can include a dispenser cabinet, gas flow meter, a fuelling hose and fuelling nozzle attachments.
3.5 hydrogen service level
HSL
pressure level in MPa used to characterize the hydrogen service of the dispenser based on the NWP
rating of the vehicle
Note 1 to entry: The numerical value of HSL also matches the number after the“H”in Pressure Class.
Note 1 to entry: Hydrogen service level is expressed in MPa.
3.6 maximum allowable working pressure
MAWP
maximum pressure permissible in a system at the temperature specified for the pressure
Note 1 to entry: The maximum allowable working pressure may also be defined as the design pressure, the maximum allowable operating pressure, the maximum permissible working pressure, or the maximum allowable pressure for the rating of pressure vessels and equipment manufactured in accordance with national pressure vessel codes.
3.7 maximum operating pressure
MOP
highest pressure that is expected for a component or system during normal operation
3.8 valve
device by which the flow of a fluid may be started, stopped or regulated, using a movable part which
opens or obstructs passage
3.8.1 check valve
valve which allows gas to flow in only one direction
3.8.2 excess flow valve
valve which automatically shuts off or limits the gas flow when the flow exceeds a set design value
3.8.3 flow control valve
gas flow restricting device, installed downstream of a pressure regulator, which controls gas flow
3.8.4 breakaway device
device on the fuelling hose that disconnects the hose from the dispenser when a tension limit is
exceeded and blocks the flow of hydrogen from the dispenser, e.g. if the vehicle moves away with the fuelling hose connected to the vehicle
Note 1 to entry: This device is treated as a type of valve according to 3.8.
3.8.5 manual valve
hand-operated device for controlling the flow of gas
AS 19880.3:2020 pdf Gaseous hydrogen — Fuelling stations Part 3: Valves (ISO 19880-3:2018, MOD)
