ISO/DIS 20100
(Main)Gaseous hydrogen -- Fuelling stations
Gaseous hydrogen -- Fuelling stations
Hydrogène gazeux -- Stations de remplissage
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Standards Content (sample)
DRAFT INTERNATIONAL STANDARD ISO/DIS 20100
ISO/TC 197 Secretariat: SCC
Voting begins on Voting terminates on
2011-03-21 2011-08-21
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Gaseous hydrogen — Fuelling stationsHydrogène gazeux — Stations de remplissage
[Revision of first edition (ISO 20100:2008)]
ICS 43.060.40; 71.100.20
In accordance with the provisions of Council Resolution 15/1993 this document is circulated in
the English language only.Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué
en version anglaise seulement.To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
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secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME
STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.© International Organization for Standardization, 2011
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ISO/DIS 20100
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ISO/DIS 20100
Contents Page
Foreword ........................................................................................................................................................... vii
1 Scope ...................................................................................................................................................... 1
2 Normative references ............................................................................................................................ 2
3 Terms and definitions ........................................................................................................................... 3
4 General design requirements ............................................................................................................... 8
4.1 General ................................................................................................................................................... 8
4.2 Hazard and risk assessment ................................................................................................................ 9
5 Hydrogen delivery systems .................................................................................................................. 9
5.1 General ................................................................................................................................................... 9
5.1.1 Access to the hydrogen delivery and storage areas ......................................................................... 9
5.1.2 Electrical grounding .............................................................................................................................. 9
5.2 Gaseous hydrogen supply by tube trailers and Multi Cylinder Packs (MCPs) ............................. 10
5.3 Liquid hydrogen supply ...................................................................................................................... 10
5.3.1 Liquid hydrogen storage layout and design features ..................................................................... 10
5.3.2 Liquid hydrogen transfer area............................................................................................................ 11
5.3.3 Tank foundation and supports ........................................................................................................... 11
5.3.4 Liquid hydrogen delivery lines .......................................................................................................... 11
5.3.5 Pressure relief devices ....................................................................................................................... 11
5.3.6 Cold hydrogen vents ........................................................................................................................... 12
5.3.7 Piping, fittings, valves, regulator for cryogenic service ................................................................. 12
5.3.8 Cryogenic pumps ................................................................................................................................ 12
5.3.9 Vaporizer .............................................................................................................................................. 12
5.3.10 Signs and instructions ........................................................................................................................ 13
5.3.11 Purging ................................................................................................................................................. 14
5.4 Pipeline ................................................................................................................................................. 14
6 On site generation ............................................................................................................................... 14
6.1 Hydrogen generators using water electrolysis process ................................................................. 14
6.2 Hydrogen generators using fuel processing technologies ............................................................ 14
6.2.1 Feed-stock storage .............................................................................................................................. 14
6.2.2 Hydrogen generators using fuel processing technologies ............................................................ 14
6.3 Shutdown control ................................................................................................................................ 14
7 Hydrogen compressors ...................................................................................................................... 15
7.1 General ................................................................................................................................................. 15
7.2 Vibration and movement ..................................................................................................................... 15
7.3 Compressor enclosures ..................................................................................................................... 15
7.3.1 Compressor enclosure ventilation .................................................................................................... 15
7.3.2 Compressor enclosure accessibility ................................................................................................. 15
7.4 Attachment to other buildings ........................................................................................................... 15
7.5 Enclosure access doors ..................................................................................................................... 15
7.6 Control and monitoring ....................................................................................................................... 16
7.6.1 General ................................................................................................................................................. 16
7.6.2 Inlet pressure ....................................................................................................................................... 16
7.6.3 Oxygen analysis .................................................................................................................................. 16
7.6.4 Discharge temperature ....................................................................................................................... 16
7.6.5 Discharge pressure ............................................................................................................................. 16
7.6.6 Cooling water — low pressure alarm ................................................................................................ 16
7.6.7 Purge gas on electrical equipment .................................................................................................... 16
7.6.8 Pressurized crankcases...................................................................................................................... 16
8 Filters and separators ......................................................................................................................... 17
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9 Hydrogen purifier ................................................................................................................................ 17
10 Gaseous hydrogen buffer storage tanks ......................................................................................... 17
11 Dispensers ........................................................................................................................................... 18
11.1 Location and protection of dispensers ............................................................................................ 18
11.2 Fuelling pad ......................................................................................................................................... 18
11.3 Dispenser system design .................................................................................................................. 18
11.3.1 General design and assembly ........................................................................................................... 18
11.3.2 Dispenser hydrogen isolation valves ............................................................................................... 19
11.3.3 Dispenser cabinet ............................................................................................................................... 19
11.3.4 Dispenser piping and fittings ............................................................................................................ 19
11.3.5 Filters ................................................................................................................................................... 20
11.4 Fuelling hose assembly ..................................................................................................................... 20
11.4.1 Rated operating conditions ............................................................................................................... 20
11.4.2 Composition and integration ............................................................................................................. 20
11.4.3 Prevention of damage to hose assembly in service ....................................................................... 20
11.4.4 Electrical continuity ............................................................................................................................ 20
11.4.5 Assembly and installation ................................................................................................................. 20
11.4.6 Maintenance and inspection .............................................................................................................. 21
11.5 Fuelling hose ....................................................................................................................................... 21
11.5.1 Rated operating conditions ............................................................................................................... 21
11.5.2 Hose design ......................................................................................................................................... 21
11.5.3 Hose type testing and production testing ........................................................................................ 21
11.5.4 Hose marking ...................................................................................................................................... 21
11.5.5 Venting hose ....................................................................................................................................... 21
11.5.6 Maintenance and inspection .............................................................................................................. 21
11.6 Fuelling connector (nozzle) general design and assembly ............................................................ 22
11.6.1 General design and assembly ........................................................................................................... 22
11.6.2 Depressurization of nozzles .............................................................................................................. 22
11.7 Hose breakaway device general design and assembly .................................................................. 22
11.7.1 Rated operating conditions ............................................................................................................... 22
11.7.2 Breakaway marking ............................................................................................................................ 22
11.7.3 Breakaway electrical conductivity .................................................................................................... 22
11.7.4 Breakaway durability .......................................................................................................................... 22
11.8 Fuelling process ................................................................................................................................. 23
11.8.1 Gaseous hydrogen dispensing limits ............................................................................................... 23
11.8.2 Fuelling protocol ................................................................................................................................. 23
11.8.3 Fuelling process control .................................................................................................................... 23
11.9 Dispenser safety devices ................................................................................................................... 24
11.9.1 General considerations ...................................................................................................................... 24
11.9.2 Dispensing emergency shutdown (ESD) ......................................................................................... 24
11.9.3 Manual activation of the ESD ............................................................................................................ 25
11.9.4 Over-pressure protection ................................................................................................................... 25
11.9.5 Over-temperature protection ............................................................................................................. 25
11.9.6 Limitation of hydrogen released in case of fuelling line break ...................................................... 25
11.9.7 Physical disturbance of the dispenser ............................................................................................. 25
11.9.8 Process control failure ....................................................................................................................... 26
11.9.9 Emergency shutdown in case of break way activation .................................................................. 26
11.10 Safety notices at fuelling point .......................................................................................................... 26
12 Hydrogen fuel specifications ............................................................................................................. 26
13 Layout .................................................................................................................................................. 26
14 Separation distances and other means of physical separation .................................................... 27
14.1 Purpose ................................................................................................................................................ 27
14.2 Above ground gaseous hydrogen systems ..................................................................................... 27
14.2.1 General ................................................................................................................................................. 27
14.2.2 Standard separation distances for gaseous hydrogen systems ................................................... 27
14.2.3 System design adjusted separation distances for gaseous hydrogen systems ......................... 32
14.2.4 Consideration of means of leak detection and isolation ................................................................ 34
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14.2.5 Application of separation distances .................................................................................................. 34
14.2.6 Fire barriers .......................................................................................................................................... 34
14.3 Above ground liquid hydrogen storage systems ............................................................................ 35
14.4 Location of hydrogen vent system outlets ....................................................................................... 36
14.4.1 Conditions on location of vent outlet for all venting situations except emergency
discharge of gaseous hydrogen storage systems .......................................................................... 36
14.4.2 Conditions on location of vent outlet to be met for the emergency discharge of gaseous
hydrogen storage systems ................................................................................................................. 36
15 Fire and explosion hazard protection requirements ....................................................................... 37
15.1 General requirements ......................................................................................................................... 37
15.2 Area classification ............................................................................................................................... 37
15.2.1 Area classification around hydrogen systems (excluding vent systems outlets) ....................... 37
15.2.2 Area classification around vent systems outlets ............................................................................. 38
15.3 Areas subject to restriction of activity .............................................................................................. 38
15.3.1 Construction of enclosure containing hydrogen systems ............................................................. 38
15.4 Protection requirements for equipment within classified areas .................................................... 38
15.5 Prevention of the accumulation of ignitable mixtures in enclosures ............................................ 39
15.6 Ventilation specification ..................................................................................................................... 40
15.7 Start-up purge ...................................................................................................................................... 40
15.8 Areas adjacent to hazardous areas ................................................................................................... 40
15.9 Hydrogen detection systems ............................................................................................................. 40
15.10 Safety of personnel ............................................................................................................................. 41
16 Hydrogen storage siting requirements ............................................................................................. 41
16.1 Ground storage .................................................................................................................................... 41
16.2 Below ground vaults ........................................................................................................................... 41
16.2.1 General ................................................................................................................................................. 41
16.2.2 Design and construction .................................................................................................................... 41
16.2.3 Location of accessories ...................................................................................................................... 41
16.2.4 Internal clearance ................................................................................................................................ 41
16.2.5 Adjacent vaults .................................................................................................................................... 42
16.2.6 Ventilation ............................................................................................................................................ 42
16.2.7 Pressure relief device ......................................................................................................................... 42
16.2.8 Access way .......................................................................................................................................... 42
16.3 Fuelling station canopy top storage .................................................................................................. 42
16.3.1 Location ................................................................................................................................................ 42
16.3.2 Construction ........................................................................................................................................ 42
16.3.3 Signage ................................................................................................................................................. 42
16.4 Roof top installation of gaseous hydrogen systems ....................................................................... 42
16.4.1 General ................................................................................................................................................. 42
16.4.2 Location on roof and access .............................................................................................................. 42
16.4.3 Roof structural requirements ............................................................................................................. 43
16.4.4 Gaseous hydrogen storage mounting .............................................................................................. 43
16.4.5 Other hydrogen equipment mounting ............................................................................................... 43
16.4.6 Mounting of hydrogen piping ............................................................................................................. 43
16.4.7 Fire protection ..................................................................................................................................... 43
16.4.8 Minimum separation distances .......................................................................................................... 44
16.4.9 Markings ............................................................................................................................................... 44
17 General equipment requirements ...................................................................................................... 44
17.1 Materials ............................................................................................................................................... 44
17.1.1 General requirements ......................................................................................................................... 44
17.1.2 Hydrogen compatibility ....................................................................................................................... 44
17.1.3 Hydrogen and material compatibility at cryogenic temperatures .................................................. 45
17.2 Piping carrying gaseous hydrogen ................................................................................................... 45
17.3 Pressure relief device for gaseous hydrogen systems ................................................................... 45
17.4 Protection from the accumulation of static charges ....................................................................... 45
17.5 Equipment grounding and bonding .................................................................................................. 46
17.6 Valves for gaseous hydrogen ............................................................................................................ 46
17.7 Instruments and cabinets ................................................................................................................... 46
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18 Gaseous hydrogen vent systems ..................................................................................................... 47
18.1 General ................................................................................................................................................. 47
18.2 Outlet .................................................................................................................................................... 47
18.3 Outlet location ..................................................................................................................................... 47
18.4 Material ................................................................................................................................................ 47
18.5 Maximum flow rate calculation .......................................................................................................... 47
18.6 Piping diameter and exit velocity ...................................................................................................... 48
18.7 Maximum pressure drop .................................................................................................................... 48
18.8 Piping design ...................................................................................................................................... 48
18.9 Height above ground and location.................................................................................................... 48
18.10 Water drain valve ................................................................................................................................ 48
18.11 Flame arrestors ................................................................................................................................... 48
18.12 Hazardous area classification ........................................................................................................... 48
19 Instrumentation control and safety systems ................................................................................... 49
19.1 General ................................................................................................................................................. 49
19.2 Master system ..................................................................................................................................... 50
19.3 Alarms .................................................................................................................................................. 50
19.4 Pneumatics ...............................
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