ISO 19880-2:2025 気体水素 — 給油ステーション — Part 2:ディスペンサーと分配システム | ページ 6

3.1

breakaway device

device on the fuelling hose (3.11) that disconnects the hose from the dispenser (3.5) when a tension limit is exceeded and blocks the flow of hydrogen from the dispenser (3.5) , e.g. if the vehicle moves away with the fuelling hose (3.11) connected to the vehicle

[SOURCE:ISO 19880-1:2020, 3.50]

3.2

component pressure rating

maximum pressure at which it is permissible to operate a component as specified by the manufacturer (3.15) at a specified temperature

Note 1 to entry: Components designed with a maximum allowable pressure per the European PED represent the component pressure rating by the manufacturer (3.15) as indicated by the value of “PS”.

Note 2 to entry: See Annex E of ISO 19880-1 for discussion of pressure terminology and its application to dispensing systems (3.6) .

Note 3 to entry: Unless otherwise specified, the pressure in this document is expressed in gauge pressure.

[SOURCE:ISO 19880-1:2020, 3.10 modified – Notes 2 to 4 to entry deleted with Note 5 to entry of the source definition renumbered as Note 2 to entry.]

3.3

control system

system which responds to input signals from the process and/or from an operator and generates output signals causing the process to operate in the desired manner

[SOURCE:ISO 19880-1:2020, 3.11 modified – Note 1 to entry deleted.]

3.4

flow coefficient

C_v

coefficient to represent the flow rate of fluid that a valve (3.28) is capable of handling

Note 1 to entry: C_v is the flow coefficient of a valve (3.28) with the fluid at 15,56 °C under a pressure difference of 6 894 N/m² (= Pa)

3.5

dispenser

equipment in the dispensing system (3.6) , including the dispenser cabinet(s) and supporting structure, that is physically located in the fuelling area

Note 1 to entry: The hydrogen dispenser typically includes, as a minimum, the fuelling assembly (3.10) , required temperature and pressure instrumentation, filters and the user interface to conduct vehicle fuelling.

Note 2 to entry: The manufacturer (3.15) of the hydrogen dispenser can elect to include additional equipment in the dispenser, including the possibility of all equipment in the dispensing system (3.6) .

[SOURCE:ISO 19880-1:2020, 3.13]

3.6

dispensing system

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

[SOURCE:ISO 19880-1:2020, 3.17]

3.7

emergency shutdown system

ESS

system which responds to automatic and/or manually activated emergency shutdown devices to stop hazardous movements and operations such as the flow of hydrogen gas to the dispenser (3.5) and vehicle

3.8

enclosure

structure, protective housing (3.13) , container, machine cabinet, etc., which encloses or partially encloses equipment of a station that may have access for maintenance but is not intended to be occupied

Note 1 to entry: In this document the enclosure of the dispenser (3.5) is defined as a “dispenser cabinet”.

Note 2 to entry: Some hydrogen station manufacturers (3.15) may build an all-in-one fuelling station (3.12) where the dispenser components are built into one side or end of the equipment enclosure without using a separate dispenser cabinet.

Note 3 to entry: The use of an enclosure could be to protect equipment from the environment, provide noise attenuation or provide safety to the areas surrounding the equipment.

[SOURCE:ISO 19880-1:2020, 3.18 modified – Notes 1 and 2 to entry are newly inserted, the original Note 1 to entry is renumbered as Note 3 to entry and the original Note 2 to entry deleted.]

3.9

fitting

part or design feature on a component used to join (i.e., connect) any pressure-retaining components in the system

[SOURCE:ISO 19880-1:2020, 3.24]

3.10

fuelling assembly

part of the dispenser (3.5) providing the interface between the hydrogen fuelling station (3.12) and the vehicle — an assembly consisting of a breakaway device (3.1) , a hose(s), a nozzle (3.19) and connections between these components

Note 1 to entry: The fuelling assembly can include, or not include, a nozzle vent line (with hose breakaway device (3.1) and hose) depending on the type of nozzle (3.19) , and communications, if used.

[SOURCE:ISO 19880-1:2020, 3.26]

3.11

fuelling hose

flexible conduit used for dispensing gaseous hydrogen to vehicles through a fuelling nozzle (3.19)

[SOURCE:ISO 19880-1:2020, 3.27]

3.12

fuelling station

facility for the dispensing of compressed hydrogen vehicle fuel, often referred to as a hydrogen refuelling station (HRS) or hydrogen filling station, including the supply of hydrogen, and hydrogen compression, storage and dispensing systems (3.6)

[SOURCE:ISO 19880-1:2020, 3.29]

3.13

housing

guard or enclosure (3.8) for operating parts, control mechanisms, or other components that do not need to be accessible during normal operation

Note 1 to entry: Housing may be synonymous with: enclosure (3.8) , cabinet or frame.

[SOURCE:ISO 19880-1:2020, 3.40]

3.14

hydrogen service level

HSL

pressure level in MPa used to characterize the hydrogen service of the dispensing system (3.6) 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 (3.20) (see Table 1 in ISO 19880-1).

Note 2 to entry: See Annex E of ISO 19880-1 for application of pressure terminology to hydrogen-dispensing systems and vehicles.

[SOURCE:ISO 19880-1:2020, 3.42]

3.15

manufacturer

person or organization responsible for the design and manufacturer of the equipment and components

3.16

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 can 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.

Note 2 to entry: See Annex E of ISO 19880-1 for a discussion of pressure terminology and the application to dispensing systems (3.6) and fuelling stations (3.12) in general.

[SOURCE:ISO 19880-1:2020, 3.45]

3.17

maximum operating pressure

MOP

highest pressure that is expected for a component or system during normal operation, including anticipated transients

Note 1 to entry: In the case of the dispensing system (3.6) , the MOP is equivalent to the maximum fuelling pressure of the vehicle.

Note 2 to entry: See Annex E of ISO 19880-1 for a discussion of pressure terminology and the application to dispensing systems (3.6) and fuelling stations (3.12) in general.

[SOURCE:ISO 19880-1:2020, 3.47]

3.18

nominal working pressure

NWP

pressure of a vehicle compressed hydrogen storage system (CHSS) at 100 % SOC (3.27) at a gas temperature of 15 °C

Note 1 to entry: For further guidance on pressure terminology and associated equipment ratings, see Annex E of ISO 19880-1.

[SOURCE:ISO 19880-1:2020, 3.51 modified – Notes 1 to 4 to entry deleted and new Note 1 to entry inserted.]

3.19

nozzle

device connected to a fuel dispensing system (3.6) which permits the quick connect and disconnect of fuel supply to the receptacle (3.22) of the vehicle or storage system

[SOURCE:ISO 17268: 2012, 3.11]

3.20

pressure class

non-dimensional rating of components designed to dispense hydrogen to road vehicles at the required pressure

Note 1 to entry: The numbers following “H” in the pressure class are numerically the same as HSL, but the HSL identifies only the level of the dispensing service whereas the pressure class designation shows that the component is fully capable of meeting the pressure and temperature requirements for dispensing hydrogen at the indicated service level.

Note 2 to entry: See Annex E of ISO 19880-1 for a discussion of pressure terminology and its application to dispensing systems (3.6) and fuelling stations (3.13) in general.

[SOURCE:ISO 19880-1:2020, 3.58 modified – Note 3 to entry deleted]

3.21

pressure relief device

PRD

safety device that releases gases or liquids above a specified pressure value in cases of emergency or abnormal conditions

Note 2 to entry: See Annex E of ISO 19880-1 for discussion of pressure terminology and its application to pressure protection of the dispensing system and fuelling stations (3.12) in general.

[SOURCE:ISO 19880-1:2020, 3.59]

3.22

receptacle

device connected to a vehicle storage system which receives the nozzle (3.19)

Note 1 to entry: This can also be referred to as a fuelling inlet or gas filling port in other documents.

[SOURCE:ISO 17268: 2020, 3.15]

3.23

risk assessment

determination of quantitative or qualitative value of risk related to a specific situation and a recognized threat (also called hazard)

Note 1 to entry: Based on national requirements, a review of a risk analysis or a safety concept by third party is sometimes required.

[SOURCE:ISO 19880-1:2020, 3.66]

3.24

safety function

function to be implemented by a safety-instrumented system, which is intended to achieve or maintain a safe state for the process, with respect to a specific hazardous situation

Note 1 to entry: Other technologies or risk reduction measures have a safety function not achieved through a safety-instrumented system, however validation of these measures is equally important.

[SOURCE:ISO 19880-1:2020, 3.71]

3.25

safety instrumented system

SIS

instrumented system used to implement one or more safety instrumented functions

Note 1 to entry: A safety instrumented system (SIS) is composed of any combination of sensors, logic solvers, and final elements.

Note 2 to entry: A separate safety-instrumented system (SIS), typically with a greater reliability than the more basic process control system, can be required, according to the manufacturer’ s (3.15) risk assessment (3.23) , to respond solely to safety critical alarms. Further information is provided by IEC 61508 and IEC 61511.

[SOURCE:ISO 19880-1:2020, 3.72]

3.26

shutoff valve

on/off valve (3.28) for controlling the flow of gas, which is pneumatically or electrically actuated

3.27

state of charge

SOC

density (or mass) ratio of hydrogen in the compressed hydrogen storage system (CHSS) between the actual CHSS condition and the capacity at nominal working pressure (3.18) when the system is equilibrated at 15 °C

Note 1 to entry: SOC is expressed as a percentage and is computed based on the gas density according to Formula (1).