ISO/TR 7470:2026

Technical
Report
ISO/TR 7470
Fourth edition
Gas cylinders — List of provisions
2026-08
Bouteilles à gaz — Inventaire des dispositions
Reference number
© ISO 2026
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ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Valve outlets by countries and by threads . 1

iii
Foreword
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with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
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This document was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 2, Cylinder
fittings.
This fourth edition cancels and replaces the third edition (ISO/TR 7470:2023), which has been technically
revised.
The main changes are as follows:
— the tables have been provided in a spreadsheet available at:
https://standards.iso.org/iso/tr/7470/ed-4/en/
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html

iv
Technical Report ISO/TR 7470:2026(en)
Gas cylinders — List of provisions
1 Scope
This document lists gas cylinders valve outlets in use.
This document provides details of thread types and sizes.
NOTE Complete descriptions of particular valve outlets are given in national standards.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Valve outlets by countries and by threads
Table 1 lists the gas and the corresponding tabs in the spreadsheet available at: https:// standards .iso .org/
iso/ tr/ 7470/ ed -4/ en/ , where the nominal dimensions, designations and references of valve outlets found in
national standards are presented by country and by thread type. All of the pressures are given in bar. In
case of doubt, refer to the applicable valve outlet standard.
NOTE The pressure ratings are taken from the standards. The pressure rating for compressed gas normally
corresponds to the working pressure of the gas cylinder and for liquefied gases to the test pressure of the gas cylinder.
Table 1 — List of gas with the corresponding tabs
Valve outlets Valve outlets
Gas UN number
by countries by threads
1,1-DIFLUOROETHANE 1030 Table 1 Table 2
1,1,1,2-TETRAFLUOROETHANE (R134a) 3159 Table 3 Table 4
1,1,1-TRICHLOROTRIFLUOROETHANE Table 5 Table 6
1,1,2-TRICHLOROTRIFLUOROETHANE (R113) Table 7 Table 8
1,1-DICHLOROTETRAFLUOROETHANE (R114a) Table 9 Table 10
1,1-DIFLUOROETHYLENE 1959 Table 11 Table 12
1,2-DIBROMOTETRAFLUOROETHANE (R114B2) Table 13 Table 14
1,2-DICHLORODIFLUOROETHYLENE Table 15 Table 16
1,2-DICHLOROETHYLENE (R1130) 1150 Table 17 Table 18
1,2-DICHLOROHEXAFLUOROCYCLOBUTANE (RC316) Table 19 Table 20
1,3-BUTADIENE-1,3 1010 Table 21 Table 22

TTabablele 1 1 ((ccoonnttiinnueuedd))
Valve outlets Valve outlets
Gas UN number
by countries by threads
1.1.1TRIFLUOROETHANE OR R143A 2035 Table 23 Table 24
1-CHLORO 1,1-DIFLUORETHANE 2517 Table 25 Table 26
1-CHLORO-1,2,2,2-TETRAFLUOROETHANE (R124) Table 27 Table 28
1-CHLORO-2,2,2-TRIFLUOROETHANE (R133a) Table 29 Table 30
2,3,3,3-TETRAFLUORO-1-PROPENE (R1234yf) Table 31 Table 32
2-METHYLPROPENE 1055 Table 33 Table 34
3-METHYL-1-BUTENE 2561 Table 35 Table 36
ACETYLENE 1001 Table 37 Table 38
AMMONIA 1005 Table 39 Table 40
ARGON 1006 Table 41 Table 42
ARSINE 2188 Table 43 Table 44
BORON TRICHLORIDE 1741 Table 45 Table 46
BORON TRIFLUORIDE 1008 Table 47 Table 48
BREATHABLE GAS MIXTURES (UNCO < 7% O.I. > O.I. (UNAIR)) Table 49 Table 50
BREATHABLE GAS MIXTURES (UNO.I.=O.I.(UNAIR)) Table 51 Table 52
BROMINE CHLORIDE 2901 Table 53 Table 54
BROMINE PENTAFLUORIDE 1745 Table 55 Table 56
BROMINE TRIFLUORIDE 1746 Table 57 Table 58
BROMOCHLORODIFLUOROMETHANE (R12B1) 1974 Table 59 Table 60
BROMOCHLOROMETHANE 1887 Table
...