ISO 11114-1:2020/Amd 1:2023

INTERNATIONAL ISO
STANDARD 11114-1
Third edition
2020-05
AMENDMENT 1
2023-07
Gas cylinders — Compatibility of
cylinder and valve materials with gas
contents —
Part 1:
Metallic materials
AMENDMENT 1
Bouteilles à gaz — Compatibilité des matériaux des bouteilles et des
robinets avec les contenus gazeux —
Partie 1: Matériaux métalliques
AMENDEMENT 1
Reference number
ISO 11114-1:2020/Amd.1:2023(E)
ISO 11114-1:2020/Amd.1:2023(E)
© ISO 2023
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ii
ISO 11114-1:2020/Amd.1:2023(E)
Foreword
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cylinders, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
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iii
ISO 11114-1:2020/Amd.1:2023(E)
Gas cylinders — Compatibility of cylinder and valve
materials with gas contents —
Part 1:
Metallic materials
AMENDMENT 1
6.3.2, Table 1
Replace the rows corresponding to Gas numbers 5, 6, 49, 58, 59, 61, 62, 63 with the following:
ISO 11114-1:2020/Amd.1:2023(E)
Table 1 — Gas/material compatibility
No. Gas number Name Formula Key compatibility characteristics Material
UN number
Cylinder Valve (body and
components)
A N A N
5 (UN 1741) BORON TRICHLORIDE BCl Hydrolyses to hydrogen chloride in contact with NS AA CS AA
moisture. In wet conditions, see specific risk of
QTS SS B
hydrogen chloride compatibility, i.e. severe corro-
SS Ni
sion of most of the materials and risk of hydrogen
embrittlement.
Ni ASB
Mixtures of dry gas not exceeding 0,1 % of this gas
may be filled into AA cylinders.
6 (UN 1008) BORON TRIFLUORIDE BF Hydrolyses to hydrogen fluoride in contact with NS AA CS AA
moisture. In wet conditions, see specific risk of
QTS SS B
hydrogen fluoride compatibility, i.e. severe corro-
SS Ni
sion of most of the materials and risk of hydrogen
embrittlement.
Ni ASB
Mixtures containing less than 0,1 % BF may be
filled into AA cylinders.
49 (UN 1045) FLUORINE F Hydrolyses to hydrogen fluoride in contact with QTS AA CS AA
moisture. In wet conditions, see specific risk of
a
NS SS B
hydrogen fluoride compatibility, i.e. severe corro-
SS Ni
sion of most of the materials and risk of hydrogen
embrittlement.
Ni ASB
Risk of violent reaction with AA.
Recommended materials are also Ni alloy and re-
fined nickel.
Mixtures containing less than 0,1 % of this gas may
be filled into AA cylinders.
NOTE  Incoloy© and Hastelloy© are examples of suitable products available commercially. This information is given for the convenience of users of this document and does not
constitute an endorsement by ISO of these products.
a
Brass is only acceptable as a valve body but not as a general valve component material.
b
For mixtures containing up to 1 000 ppm of dry NO, brass valves can be used.

ISO 11114-1:2020/Amd.1:2023(E)
Table 1 (continued)
No. Gas number Name Formula Key compatibility characteristics Material
UN number
Cylinder Valve (body and
components)
A N A N
58 (UN 1048) HYDROGEN BROMIDE HBr This compound is highly hygroscopic and corrosive NS AA CS B
in wet conditions with most of the materials except
QTS SS AA
some high corrosion resistant nickel alloys (e.g.
SS Ni
Hastelloy©). QTS are limited to a maximum ulti-
mate tensile strength of 950 MPa. This limitation
Ni ASB
also applies to mixtures containing the gas stored
at a total pressure at 15 °C greater than half the
normal service pressure of the cylinder.
However, experience shows that a cylinder can be
safely used without any specific strength limitation
requirements, providing the maximum working
pressure at 15 °C in the cylinder is less than one-
fifth of the test pressure (TP/5), in order to main-
tain a low stress level in the cylinder material.
...