By Authority Of - Law is the operating system of our ...ISO 11114-1 :1997(E) Foreword The text of EN ISO 11114-1 :1997 has been prepared by Technical Committee CENfTC 23 "Transportable

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By the Authority Vested By Part 5 of the United States Code § 552(a) and Part 1 of the Code of Regulations § 51 the attached document has been duly INCORPORATED BY REFERENCE and shall be considered legally binding upon all citizens and residents of the United States of America. HEED THIS NOTICE: Criminal penalties may apply for noncompliance.

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Standards Body:

e

INTERNATIONAL STANDARD

ISO 11114-1

First edition 1997-10~15

Transportable gas cylinders ......­,Compatibility of cylinder and valve materials with gas contents -

Part 1: Metallic materials

Bouteilles a gaz transportables - Compatibilite des maferiaux des bouteilles et des robinets avec les contenus gazeux -

Partie 1: Materiaux metalliques

This material is reproduced from ISO documents under International Organization for Standardization (ISO) Copyright License number IHS/ICC/1996. Not for resale. No part of these ISO documents may be reproduced in any form. electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of ISO (Case posta Ie 56,1211 Geneva 20. Switzerland, Fax +4122 73410 79),IHS or the ISO Licensor's members.

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Reference number ISO 11114~1; 1997(E)

ISO 11114-1 :1991(E)

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non­governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (lEG) on all matters of electrotechnical standardization.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

International Standard ISO 11114-1 was prepared by the European Committee for Standardization (CEN) in collaboration with ISO Technical Committee TC 58, Gas cylinders, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

ISO 11114 consists of the following parts, under the general title Transportable gas cylinders - Compatibility of cylinder and valve materials with gas contents:

Part 1: Metallic materials

Part 2: Non-metallic materials

Part 3: Autogenous ignition test in oxygen atmosphere

Annex A forms an integral part of this part of ISO 11114. Annex ZZ is for information only.

Annex Z2 provides a list of corresponding International and European Standards for which equivalents are not given in the text.

© ISO 1997

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical. including photocopying and microfilm, without permission in writing from the publisher.

Intemational Organization for Standardization Case postals 56 • CH-1211 Geneva 20 • Switzerland .ntemet central @iso.ch X,400 c=ch; a=400net; p:;iso; o=isocs; s=eentral

Printed in Switzerland

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©ISO ISO 11114 .. 1:1997(E)

Table of contents

Foreword ...................................................................................................................... _ ..... 3

Introduction '0' ............................................................................................................... _ ••••• 4

1 Scope ..................................................................................................................... 5

2 Normative references .................................................................................... 0 •••••• 5

3 Definitions ............................................................................................................. 6

4 Materials ................................................................................................................ 6

5 Compatibil ity criteria ............................................................................................. 7

6 Material compatibility ............................................................................................. 9

Annex A (normative) GasiMaterials NQSAB compatibility code ...................................... 32

iii

ISO 11114-1 :1997(E)

Foreword

The text of EN ISO 11114-1 :1997 has been prepared by Technical Committee CENfTC 23 "Transportable gas cylinders" the secretariat of which is held by BSI in collaboration with Technical Committee Isorrc 58 "Gas cylinders".

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1998, and conflicting national standards shall be withdrawn at the latest by April 1998.

According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland. Ireland: Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

Introduction

This Standard is one part of a three-part standard concerning compatibility of gases and gas mixtures with materials:

- Part 1 : Metallic materials ; - Part 2 : Non metallic materials; - Part 3 : Autogenous ignition test in oxygen atmosphere.

Industrial, medical and special gases (e.g. high purity gases, calibration gases) can be transported or stored in gas cylinders. An essential requirement of the material from which such gas cylinders and their valves are manufactured is compatibility with the gas contents.

Compatibility of cylinder materials with gas content has been established over many years by practical application and experience. Existing national and international regulations and standards do not fully cover this aspect.

This Standard is based on current international experience and knowledge.

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©ISO ISO 11114 .. 1 :1997(E)

1 Scope

This standard gives guidance in the selection and evaluation of compatibility between metallic gas cylinder and valve materials, and the gas content.

The compatibility data given is related to single component gases.

Seamless and welded gas cylinders used to contain compressed, liquefied and dissolved gases, are considered.

Aspects such as quality of delivered product are not considered.

2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.

EN 485-2

EN 586-2

EN 720-2

EN 849

prEN 1964-1

prEN 1975

prEN ISO 11114-2

EN ISO 11114-3

Wrought aluminium and aluminium alloys - Sheets. strips and plates - Part 2 : Mechanical properties.

Aluminium and aluminium alloys forgings - Part 2 : Mechanical and additional properties.

Transportable gas cylinders - Gases and gas mixtures - Part 2 : Determination of flammability and oxidizing ability of gases and gas mixtures

Transportable gas cylinders - Cylinder valves - Specification and type testing

Transportable gas cylinders - Specification for the design and construction of refillable transportable seamless steel gas cylinders of capacity from 0,5 litre up to and including 150 litres - Part 1 : Seamless steel with a maximum Rm value of 1100 N/mm2

Transportable gas cylinders - Specification for the design and construction of refillable transportable seamless aluminium alloy gas cylinders of capacity from 0,5 litre up to 150 litre

Transportable gas cylinde rs - Compatibility of cylinder and valve materials with gas contents - Part 2 : Non metallic materials

Transportable gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 3 : Autogenous ignition test in oxygen atmosphere

1

ISO 11114-1 :1997{E)

ISOIDIS 7866

ISOIDIS 9809-1

ISO 9328-5

3 Definitions

Refillable transportable seamless aluminium alloy gas cylinders for worldwide usage - Design, construction and testing

Transportable seamless steel gas cylinders - Design, construction and testing - Part 1 : Quenched and tempered steel cylinders with tensile strength below 1100 MPa

Steel plates and strips for pressure purposes - Technical delivery conditions - Part 5 : Austenitic steels

For the purposes of this European Standard the following definitions apply:

3.1 Competent person

A person who has the necessary technical knowledge, experience and authority to assess and approve materials for use with gases and to define any special conditions of use that are necessary. Such a person will also normally be formally qualified in an appropriate technical discipline.

3.2 Acceptable

A materiaVgas combination that is satisfactory under normal conditions of use, provided the key compatibility features, given in Table 1, are taken into account.

3.3 Not recommended

A materiaVgas combination that may not be safe. Such combinations can be used where they have been assessed and authorized by a competent person who specifies the conditions of use.

4 Materials

4.1 Cylinder material

The metallic materials most commonly used in the manufacture of gas cylinders are specified in the following standards:

Aluminium:

EN 485-2 EN 586-2 prEN 1975 ISOIDIS 7866

Steel:

ISO 9328-5 prEN 1964-1 ISOIDIS 9809-1

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©ISO ISO 11114-1 :1997(E)

4.2 Valve materials

The most commonly used materials for valve bodies for gas cylinders are brass and other copper based alloys, carbon steel, stainless steel and aluminium alloys.

In some special applications nickel or nickel plated alloys are used.

Some carbon steels, stainless steels and aluminium alloys for valve bodies are specified in the same standard as those for gas cylinders (see 4.1).

4.3 Particular considerations

4.3.1 In particular cases non-compatible materials may be used if suitably plated or protected. This can only be done, if all compatibility aspects have been considered and validated by a competent person.

4.3.2 Non-metallic components, e.g. valve sealing, gland packing, O-ring etc ... shall be in accordance with prEN ISO 11114-2. Sealing or lubricating materials, when used, at the valve stem shall be compatible with the gas content.

Special precautions (see EN ISO 11114-3) shall be taken for oxidizing gases (see EN 720-2).

4.3.3 For cylinder valves, compatibility in wet condition shall be considered because of the high risk of contamination by atmospheric moisture.

5 Compatibility criteria

5.1 General

Compatibility between a gas and the cylinder material is affected by chemical reactions and physical influences, which can be classified into five categories:

- corrosion (probably the most frequent type of reaction which could be expected) ;

- hydrogen embrittlement :

- generation of dangerous products through chemical reaction;

- violent reactions (like ignition) ;

- embrittlement at low temperature.

5.2 Corrosion

Many types of corrosion mechanisms can occur due to the presence of the gas.

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ISO 11114 .. 1:1997(E)

5.2.1 Dry corrosion

Is the chemical attack by a dry gas on the cylinder material. The result is a reduction of the cylinder wall thickness. This type of corrosion is not very common, because the rate of dry corrosion is very low at ambient temperature.

5.2.2 Wet corrosion

Is the most common type of corrosion which only occurs in a gas cylinder due to the presence of free water. However with some hygroscopic gases (e.g. HCI, C12) corrosion would occur even if the water content is less than the saturation. Therefore some gas/material combinations are not recommended, even if inert in the theoretical dry conditions. It is therefore very important to prevent any water ingress in gas cylinders.

The most common sources of water ingress are:

- by the customer (retro-diffusion/backfilling or when the cylinder is empty, by air entry, if the valve is not closed) ;

- during hydraulic testing;

.. during filling.

In some cases it is very difficult to prevent any water ingress - particularly when the gas is hygroscopic (e.g. C12 • HCI). In cases where the filler cannot guarantee the dryness of gas and cylinder, a cylinder material which is compatible with the ,wet gas shall be used, even if the dry gas is not corrosive.

There are different types of "wet corrosion" in alloys:

- general corrosion: e.g. by acid gases (C02 , 802) or oxidizing gases (02' CI2). Additionally some gases, even inert ones, when hydrolysed could lead to the production of corrosive products (e.g. 8iH2C12) ;

-localised corrosion: e.g. pitting corrosion by wet HCI in aluminium alloys or stress corrosion cracking of highly stressed steels by wet CO/C02 mixtures.

5.2.3 Corrosion by impurities

Gases which themselves are inert (non-corrosive) can cause corrosion due to the presence of impurities. Pollution of gases can occur, during filling, during use or if the initial product is not properly purified.

The most common pollutants are :

4

- atmospheric air, in this case the harmful impurities can be moisture (see also 5.2.2) and oxygen (e.g. in liquefied ammonia) ;

- aggressive products contained in some gases, e.g. H2S in natural gas;

- aggressive traces (acid, mercury. etc.) remaining from the manufacturing process of some gases.

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©ISO ISO 11114-1 :1997(E)

When the effects of these types of corrosion are expected to be dangerous and the presence of these impurities cannot be prevented, then cylinder materials compatibre with the impurities shall be used.

5.3 Hydrogen embrittlement

Embrittlement by dry gas can occur at ambient temperature in the case of certain gases and under service conditions which stresses the cylinder material. The best known example is embrittlement caused by hydrogen.

This type of stress cracking phenomenon can, under certain conditions, lead to the failure of gas cylinders containing hydrogen, hydrogen mixtures and hydrogen bearing compounds including hydrides. The risk of hydrogen embrittlement only occurs if the partial pressure of the gas and the stress level of the cylinder material is high enough.

NOTE: For 34 Cr Mo 4 Q and T steels and hydrogen equivalent partial pressures above 50 bar, the maximum UTS of the steel should be 950 MPa. Some standards specify testing methods to select appropriate steels with appropriate maximum UTS for hydrogen cylinders. Equivavent partial pressure for hydrogen sulphide and methyl mercaptan is reduced to 2~5 bar at a maximum UTS of 950 MPa.

5.4 Generation of dangerous products

In some cases reactions of a gas with a metallic material, can lead to the generation of dangerous products. Examples are the possible reaction of C2H2 with copper alloys containing more than 70 % copper, CH

3CI in aluminium cylinders.

5.5 Violent reactions (e.g. Ignition)

In principle such types of gas/metallic material reactions are not very common at ambient temperatures, because high activation energies are necessary to initiate such reactions. In the case of some non-metallic materials, this type of reaction can occur with some gases (e.g. O2 , CI2).

5.6 Embrittlement at low temperature

In some cases, for toxic gases when pumps or compressors are not recommended, the gas cylinders are filled by cooling the gas cylinder using a cryogenic product (e.g. liquid nitrogen). In such cases materials having good impact behaviour at low temperature (aluminium alloys, stainless steels) shall be used and carbon or low alloyed steels shall be rejected. In some other cases cylinders are regularly filled at low temperature e.g. with CO2, Materials used shall have adequate impact behaviour at the minimum temperature in service.

6 Material compatibility

6.1 Table of compatibility

Before any gas/cylinder/valve combination is chosen a careful study of all "KEY COMPATIBILITY CHARACTERISTICS" given in table 1 shall be made. Particular attention shall be paid to any restrictions, which shall be applied to acceptable materials.

NOTE: The gases are listed in the English alphabetic order.

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ISO 11'114-1:1997(E)

6.2 Conventions and symbols used in table 1

Bold type face indicates that the material is commonly used ;

"A" means that the material is acceptable (see 3.2) ;

"NR" means that the material is not recommended (see 3.3) ;

IIOry" means no free water in the cylinders under any service conditions including at the highest expected operating pressure and at the lowest expected operating temperature;

IIWet" means that the conditions as defined above for -dry" are not met.

6.3 Abbreviations for materials

N5 = Normalized steels and carbon steels;

QTS = Quenched and tempered steels;

AA = Aluminium alloys;

5S = Stainless steels;

B = Brass and copper alloys ;

CS = Carbon steels.

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©ISO ISO 11114 .. 1 :1997(E)

Table 1 : Gas/material compatibility

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 1 ACETYLENE Ability to form explosive acetyl ides with NS B B(Cu C2H2 certain metals including pure copper. Use QTS CS >70%)

< 70 % Cu copper alloy. AA AA SS 58

2 AMMONIA Risk of stress corrosion with brass (and NS CS NH3 copper alloys) valves due to atmospheric OT8 S8 8

moisture. AA AA SS

3 No reaction with any common materials in NS B ARGON dry or wet conditions. QTS CS Ar AA SS S8 M

NS B 4 Because of risk of hydroge n aTS CS ARSINE embrittlement special OTS and NS with a AA SS AsH3 limitation on the maximum strength shall

be used. (see 5.3), S5 AA

Some 88 alloys (e.g. AISI 304) can be sensitive to hydrogen embrittlement. Risk of corrosion by impurities in wet conditions has to be considered.

NS CS Hydrolyses to hydrogen chloride in aTS AA SS AA contact with moisture. In wet conditions SS B

5 BORON see specific risk of hydrogen chloride TRICHLORIDE compatibility Le. severe corrosion of most BCI3 of the materials and risk of hydrogen

embrittlement.

(continued)

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ISO 11114-1:1997(E) or50

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 6 BORON Hydrolyses to hydrogen fluoride in contact NS CS AA TRIFLUORIDE with moisture. In wet conditions see QTS SS B

BF3 specific risk of hydrogen fluoride 8S compatibility i.e. severe corrosion of most AA of the materials and risk of hydrogen embrittlement.

7 BROMOCHLORODI No reaction with any common materials NS B FLUOROM ETHAN E when dry. In the presence of water, slight QTS CS C BrC1F2 risk of corrosion. AA SS (R12B1 ) SS AA

8 BROMOTRIFlUORO No reaction with any common materials NS B -METHANE when dry. In the presence of water slight QTS CS CBrF3 risk of corrosion. AA S8 (R13B1) SS AA

9 BROMOTRIFlUORO No reaction with any common materia's NS B -ETHYLENE when dry. In the presence of water slight QTS CS C2BrF3 risk of corrosion. AA S8

S8 AA 10 BUTADIENE - 1,3 No reaction with any common materials: NS B H2C:CHCH:CH2 however in wet conditions risk of aTS CS

corrosion from impurities has to be AA SS considered. SS AA

11 BUTADIENE - 1,2 No reaction with any common materials; NS B H2C:C:CHCH3 however in wet conditions risk of QTS CS

corrosion from impurities has to be AA 5S considered. 55 AA

12 BUTANE No reaction with any common materials; NS B C4Hl0 however in wet conditions risk of aTS CS

corrosion from impurities has to be AA S5 considered. SS AA

(continued)

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©ISO ISO 11114-1:1997{E)

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 13 BUTENE - 1 No reaction with any common materials; NS B CH3CH2CH:CH2 however in wet conditions risk of aTS CS

corrosion from impurities has to be AA 58 considered. SS AA

14 BUTENE-2 No reaction with any common materials; NS B (CIS) however in wet conditions risk of aTS CS CH3CHCHCH3 corrosion from impurities has to be AA SS

considered. 88 AA

15 BUTENE-2 No reaction with any common materials; NS B (TRANS) however in wet conditions risk of QTS CS CH3CHCHCH3 corrosion from impurities has to be AA SS

considered. 88 AA

16 CARBON No reaction with common materials when NS B DIOXIDE dry. Forms slightly acidic carbonic acid in aTS CS CO2 the presence of water; corrosive for NS, AA SS

aTS and es. SS AA For NS and CS, risk of low temperature embrittlement. Risk of stress corrosion in presence of CO (see carbon monoxide) and water.

17 CARBON Risk of formation of toxic metal carbonyls. NS B MONOXIDE Highly sensitive to any traces of moisture QTS CS CO (> 5 ppmV at 200 bar), in the presence of AA SS

C02 (> 5 ppmV). Industrial grades of SS AA monoxide normally contain traces of CO2 This can result in risk of stress corrosion, in the case of QTS. CS and NS cylinders if used at the normal service stress levels.

18 CARBON No reaction with any common materials NS B TETRAFLUORIDE when dry. In the presence of water, slight QTS CS CF4 risk of corrosion. AA SS

S8 AA (continued)

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ISO 11114-1:1997(E) @Isa

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 19 CARBONYL Risk of formation of toxic metal carbonyls. NS B SULPHIDE Highly sensitive to any traces of moisture OTS CS COS (> 5 ppmV), in the presence of CO2 SS

(> 5 ppmV) ; industrial grades of carbonyl AA AA sulphide normally contain traces of CO2. SS This results in risk of stress corrosion, in the case of OTS, NS et es.

20 CHLORINE HydroJyses to hypochlorous acid and to 'NS AA B AA ·C12 hydrogen chloride in contact with QTS CS

moisture. In wet condition see specific risk S8 SS of hydrogen chloride compatibility i.e. severe corrosion of most of the materials and risk of hydrogen embrittlement. Risk of violent reaction with AA.

21 CHLORODI· No reaction with any common materials NS B FLUOROMETHANE when dry. In the presence of water, slight aTS CS CHCIF2 risk of corrosion. AA S8 (R22) 5S AA

22 CHLOROMETHANE In the presence of water, slight risk of NS AA B AA CH3C1 corrosion. Risk of violent reaction with M. aTS CS (R40) SS SS

23 CHLOROPENTA- No reaction with any common materials NS B FLUOROETHANE when dry. In the presence of water, slight OTS CS C2C1F5 risk of corrosion. AA SS lR11S) SS AA

24 CHLOROTETRA- No reaction with any common materials NS B FLUOROETHANE when dry. In the presence of water, slight QTS cs CCIF2CHF2 risk of corrosion. AA 5S

SS AA

(continued)

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©ISO ISO 11114-1:1997(E)

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 25 CHLOROTRIFLUOR No reaction with any common materials NS B O-ETHANE when dry. In the presence of water, slight QTS CS ·CH2CICF3 risk of corrosion. AA SS (R133a) S8 AA

26 CHLOROTRIFLUOR No reaction with any common materials NS B O-ETHYLENE when dry. In the presence of water, slight QTS CS C2C1F3 risk of corrosion. AA SS (R1113) S8 AA

27 CHLOROTRIFLUOR No reaction with any common materials NS B O-METHANE when dry. In the presence of water, slight QTS CS CC1F3 risk of corrosion. M SS (R13) S8 AA

28 CYCLOPROPANE No reaction with any com man materials in NS B C3H6 dry or wet conditions. QTS CS

AA SS SS AA

29 DEUTERIUM Because of risk of hydrogen QTS B D2 embrittlement special QTS and NS with a NS CS

limitation on the maximum strength shall AA AA be used (see 5.3). Some SS alloys (e.g. AISI 304) may be sensitive to hydrogen

SS SS

embrittlement. 30 DIBROMODIFLUOR No reaction with any common materials QTS B O-METHANE when dry. In the presence of water, slight NS CS CBr2F2 risk of corrosion AA AA (R12B2) SS S8

(continued)

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ISO 11114-1 :1997(E) @ISO

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 31 DIBROMOTETRA- No reaction with any common materials QTS B FLUOROETHANE when dry. In the presence of water, slight NS CS C2Br2F4 risk of corrosion AA AA (R114B2) 88 58

32 DIBORANE Because of risk of hydrogen QTS B· B2HS embrittlement special QTS and NS with a NS SS

limitation on the maximum strength shall AA AA be used (see 5.3). S8 CS Some SS alloys (e.g. AISI 304) can be sensitive to hydrogen embrittlement.

33 DICHLORODI- No reaction with any common materials QTS B FLUOROMETHANE when dry. In the presence of water, slight NS CS CCI2F2 risk of corrosion. AA AA (R12) SS S8

34 DICHLOROFlUO- No reaction with any common materials QTS B ROMETHANE when dry. In the presence of water, slight NS C8 CHCI2F risk of corrosion. AA AA (R21) SS SS

35 DICHLOROSILANE Hydrolyses to hydrogen chloride in OTS AA B M SiH2CI2 contact with moisture. In wet conditions NS SS

see specific risk of hydrogen chloride SS CS compatibility eJ. severe corrosion of most of the materials and risk of hydrogen embrittlement.

36 DICHLOROTETRA- No reaction with any common materials QTS B FLUOROETHANE when dry. In the presence of water, slight NS CS C2CI2F4 risk of corrosion. AA AA (R114) SS SS

(continued)

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©ISO ISO 11114~1 :1997(E)

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name C}'linder Valve Formula A NR A NR 37 CYANOGEN Corrosive in the presence of water except NS B C2N2 for high grade 88 Alloys. aTS C8

Risk of stress corrosion with brass (and SS AA copper alloys) valves due to atmospheric AA SS moisture.

38 1,1 DIFLUORO 1- No reaction with any common materials QTS B CHLOROETHANE when dry. In the presence of water, slight NS CS CH3CCIF2 risk of corrosion. AA AA (R142b) 58 55

39 1,1 DIFlUOROETHA No reaction with any common materials QTS B NE when dry. In the presence of water, slight NS CS CH3CHF2 risk of corrosion. AA AA (R152a) SS SS

40 01 FlUORO-1 ,1 No reaction with any common materials aTS B ETHYLENE when dry. In the presence of water, slight NS CS C2H2F2 risk of corrosion. Brass should contain M AA (R1132a) <70 % copper due to possibility of S8 SS

presence of acetylene as an impurity and subsequent risk formation of copper acetyl ide.

41

DIMETHYLAMINE Risk of stress corrosion with brass (and QTS CS B (CH3)2NH copper alloys) valves due to atmospheric NSAA 55

moisture. AA 42 DIMETHYL ETHER No reaction with any common materials in NS B (CH3)20 dry or wet conditions. ars CS

AA AA SS SS

(continued)

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ISO 11114-1:1997(E) elsa

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 43 DISILANE Because of risk of hydrogen NS B Si2HS embrittlement special QTS and NS with a AA CS

limitation on the maximum strength shall Q1S SS be used (see 5.3). SS AA Some S8 alloys (e.g. AISI 304) can be sensitive to hydrogen embrittlement.

44 ETHANE No reaction with any common materials in QTS B C2HS dry or wet conditions. AA CS

NS AA S5 S5

45 ETHYLAMINE Risk of stress corrosion with brass (and QTS SS B C2HSNH2 copper alloys) valves due to atmospheric NS CS

moisture. AA AA 58

46 ETHYL CHLORIDE No reaction with any common materials QTS AA B AA

C2HSCI when dry. In the presence of water, slight NS SS (R160) risk of corrosion. SS C5

47 ETHYLENE No reaction with any common materials in QTS B C2H4 dry or wet conditions. AA CS

NS AA SS SS

48 ETHYLENE OXIDE Ethylene oxide polymerizes. Ethylene QTS B C2H40 oxide polymerization increases in the NS CS

presence of moisture, rust, and other AA AA contaminants. Use dry and clean SS SS cylinders. Copper is not recommended.

(continued)

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©ISO ISO 11114-1:1997(E)

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder I Valve Formula A NR A NR 49 FLUORINE Hydrolyses to hydrogen fluoride in contact aTS AA B AA F2 with moisture. In wet conditions see NS CS

specific risk of hydrogen fluoride 8S S8 compatibility, i.e. severe corrosion of most of the materials and risk of hydrogen embrittiement. Risk of violent reaction with AA. Recommended materials are also Monel and nickel.

50 FLUOROETHANE No reaction with any common materials QTS B C2H5F when dry. In the presence of water, slight NS CS (R161) risk of corrosion. AA AA

51 S8 88

FLUOROMETHANE No reaction with any common materials QTS B CH3F when dry. In the presence of water, slight NS CS (R41) risk of corrosion. AA AA

52 SS SS

TRIFLUOROMETHA No reaction. with any common materials QTS B NE when dry. In the presence of water, slight NS CS CHFS risk of corrosion. AA AA (R23) SS SS

53 GERMANE Because of risk of hydrogen aTS B GeH4 embrittlement special aTS and NS with a NS CS

limitation on the maximum strength are to AA SS be used (see 5.3). SS AA Some SS alloys (e.g. AISI 304) can be sensitive to hydrogen embrittlement.

54 HELIUM No reaction with any common materials in NS B He dry or wet conditions. aTS CS

AA SS SS AA

(continued)

15

ISO 11114-1:1997(E) elsa

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 55 HEXAFLUOROETHA No reaction with any common materials NS B NE when dry. I n the presence of water I slight QTS cs C2FS risk of corrosion. AA S8 (R116) SS AA

56 HEXAFLUOROPRO No reaction with any common materials NS B PENE when dry. In the presence of water, slight QTS cs CgF6 risk of corrosion. AA S8 (R1216) SS AA

57 HYDROGEN Because of risk of hydrogen NS B H2 embrittlement special QTS and NS with a QTS CS

limitation on the maximum strength shall AA S8 be used (see 5.3). SS AA Some 55 alloys (e.g. AIS1304) can be sensitive to hydrogen embrittlement. Risk of embrittlement due to the presence of mercury has-to be considered especially with M.

(continued)

16

10 ISO ISO 11114-1:1997(E}

Table 1 (continued)

Gas number Key compatibility characteristics Materials

Name Cylinder 'Valve Formula A NR A NR 58 HYDROGEN This gas is highly hygroscopic and NS AA CS B BROMIDE corrosive in wet conditions with most of QTS 55 AA HBr the materials except some high grade SS S8

alloys (e.g. AISI 316). Because of risk of hydrogen embrittlement special aTS and NS with a limitation on the maximum strength shall be used. (see 5.3). This limitation also applies to mixtures containing this gas and stored at a total pressure greater than 1/2 the normal service pressure of the cylinder.However experience shows that a cylinder can be safely used without any specific requirements, providing the max. pressure at 15°C in the cylinder is less than TP/S. in order to maintain a low stress level in the cylinder material.Some S8 alloys (e.g. AISI 304) can be sensitive to hydrogen embrittlement. Experience shows plugging of B valves may occur. Special bronze alloys can be used as well as nickel and Monel.

(continued)

17

ISO 11114-1 :1997(E) elsa

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 59 HYDROGEN This compound is highly hygroscopic and NS AA CS AA CHLORIDE corrosive in wet conditions with most of QTS S5 B HCI the materials except some high grade SS SS

alloys (e.g. AISI 316). Because of risk of hydrogen Embrittlement special QTS and NS with a limitation on the maximum strength shall be used.(see 5.3) This limitation also applies to mixtures containing this gas and stored ata total pressure greater than 1/2 the normal service pressure of the cylinder. However experience shows that a cylinder can be safely used without any specific requirements, providing the max. pressure at 15°C in the cylinder is less than TP/5, in order to maintain a low stress level in the cylinder material. Some SS alloys (e.g, AISI 304) can be sensitive to hydrogen embrittlement. Experience shows plugging of B valves can occur. Special bronze alloys may be used as well as nickel and Monel.

60 HYDROGEN This compound is highly hygroscopic. NS B CYANIDE Slight risk of corrosion in wet conditions QTS CS HeN depending on type of alloy. AA SS

SS AA (continue d)1

18

©ISO ISO 11114-1 :1997{E)

Table 1 (continued)

Gas number Key compatibility Materials Name Cylinder Valve Formula A NR A NR 61 HYDROGEN This gas is highly hygroscopic and NS AA CS AA FLUORIDE corrosive in wet conditions with most of ars S5 B HF the materials excepted some high grade SS

S8 alloys (e.g. AISI316). Because of risk of hydrogen embrittlement special aTS and NS with a limitation on the maximum strength are to be used (see 5.3). This limitation also applies to mixtures containing this gas and stored at total pressure greater than 1/2 normal selVice pressure of the cylinder.However experience shows that a cylinder can be safely used without any specific requirements, providing the max. pressure at 15°C in the cylinder in less than TP/5, in order to maintain a low stress level in the cylinder material. Some S5 alloys (e.g. AISI 304) can be sensitive to hydrogen embrittlement. Experience shows plugging of B valves may occur. Special bronze alloys can be used as well as nickel and Monel.

(continued)

19

ISO 11114-1:1997(E) ©ISO

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 62 HYDROGEN This gas is highly hygroscopic and NS AA CS AA IODIDE corrosive in wet conditions with most of ars SS B HI the materials except some high grade SS SS

alloys (e.g. AISI316). Because of risk of hydrogen embrittlement special aTS and NS with a limitation on the maximum strength shall be used (see 5.3). This t

i limitation also applies to mixtures containing this gas and stored at a total pressure greater than 1/2 the normal service pressure of the cylinder. However experience shows that a cylinder can be safely used without any specific requirements, providing the max. pressure at 15°C in the cylinder is less than TP/S, in order to maintain a low stress level in the cylinder material. Some S8 alloys (e.g. AIS1304) can be sensitive to hydrogen embrittlement. Experience shows plugging of B valves can occur. Special bronze alloys may be used as well as nickel and Monel.

63 HYDROGEN Corrosive in the presence of water except N5 B SULPHIDE for high grade SS Alloys. In wet QTS CS H2S conditions risk of stress corrosion for AA 55

QTS. SS AA Risk of hydrogen embrittlement with NS, QTS and some 5S (e.g. AISI 304). For mixtures containing this gas (> 5 ppmv) and stored at a total pressure greater than 1/2 the normal service pressure of the cylinder. NS, and QTS at a limited strength shall be used.(see 5.3)

64 ISOBUTANE No reaction with any common materials; NS B CH(CH3)3 however in wet conditions risk of QTS CS

corrosion from impurities shall be AA S8 considered. 58 AA

(continued)

20

©ISO ISO 11114 .. 1 :1997(E)

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name C~linder Valve Formula A NR A NR 65 ISOBUTYLENE No reaction with any common materials ; NS B CH2:C (CH3)2 however in wet conditions risk of QTS CS

corrosion from impurities shall be SS SS considered. AA AA

66 KRYPTON No reaction with any common materials in NS B Kr the dry or wet conditions. QTS CS

AA SS SS AA

67 METHANE No reaction with any common materials; NS B CH4 however in wet conditions risk of QTS CS

corrosion from impurities such as traces AA S8 of CO, H2S. C02 shall be considered. SS AA (See CO, H2S, C02 compatibility)

68 PROPYNE May contains traces of acetylene. Ability NS B C3H4 of forming explosive acetyl ides has to be QTS CS

considered. USE < 70 % Cu COPPER AA S8 ALLOY. SS AA

69 METHYL Corrosive in wet conditions except with NS AA B AA BROMIDE high grade SS. QTS CS CH3Br RISK OF VIOLENT REACTIONS WITH 88 S5 (R40B1) AA

70 METHYL Corrosive in the presence of water except NS B MERCAPTAN for high grade S8 alloys. In wet QTS CS CH3SH conditions risk of stress corrosion for AA SS

QTS. SS AA Risk of hydrogen embrittlement with NS, ars and some SS (e.g. AISI 304). For mixtures containing this gas (> 5 ppmv) and stored at a total pressure greater than 1/2 the normal service pressure of the cylinder, NS, and QTS at a limited strength shall be used. (see 5.3)

(continued)

21

ISO 11114--1:1991(E) @ISO

Table 1 (continued)

Gas number Key c0rTIpatibil ity characteristics Materials Name Cylinder Valve Formula A NR A NR 71 METHYL SILANE Because of risk of hydrogen NS B CH3SiH3 embrittlement special aTS and NS with a QTS CS

limitation on the maximum strength shan AA SS be used. (see 5.3) SS AA Some SS alloys (e.g. AIS1304) can be sensitive to hydrogen embrittlement.

72 METHYLAMINE Risk of stress corrosion with brass (and N5 CS B CH3NH2 copper alloys) valves due to atmospheric QTS 55

moisture. AA AA SS

73 NEON No reaction with any common materials in NS B Ne dry or wet conditions. QTS CS

AA SS SS AA

74 NITRIC Corrosive in the presence of water except NS CS B OXIDE for high grade 5S alloys. Risk of stress QTS S5 NO corrosion with brass (and copper alloys) AA AA

valves due to atmospheric moisture. SS

75 NITROGEN No reaction with any common materials in NS B N2 dry or wet conditions. QTS CS

M SS S8 AA

76 NITROGEN Corrosive in the presence of water except NS CS B DIOXIDE for high grade 5S alloys. RISK OF QTS SS N02 STRESS CORROSION WITH BRASS AA AA

(and copper alloys) valves due to SS atmospheric moisture.

(continued)

22

©ISO ISO 11114-1 :1997(E)

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Qylinder Valve Formula A NR A NR 77 NITROUS OXIDE I n wet conditions, corrosive for NS, aTS NS B N20 and Carbon steel and risk of stress QTS CS

corrosion for brass and copper alloys. AA 8S The potential risk of violent reaction S8 AA (ignition), especially for valves, shall be considered at design stage. Brass and copper alloy valves present a risk of stress corrosion caused by atmospheric moisture. Risk of low temperature embrittlement for NS and CS.

78 NITROGEN No reaction with any common materials NS B TRIFLUORIDE when dry. In the presence of water, slight aTS CS NF3 risk of corrosion. SS S5

AA AA 79 OCTAFLUORO·2 No reaction with any common materials NS B BUTENE when dry. In the presence of water, slight aTS CS C4Fa risk of corrosion. AA 88

S5 AA 80 OCT AFLUOROCYC No reaction with any common materials NS B LOBUTANE when dry. In the presence of water, slight QTS CS C4Fa risk of corrosion. AA SS (RC318) S8 AA

81 OCTAFlUOROPRO No reaction with any com man materials NS B PANE when dry. In the presence of water, slight QTS CS C3FS risk of corrosion. AA SS (R218) SS AA

82 OXYGEN In presence of water NS, QTS and CS NS B °2 are corroded. The potential risk of violent QTS CS

reaction (ignition), especially for valves. AA S8 shall be considered at design stage. S8 AA Cylinder valves shall be subject to testing to establish their suitability for the oxygen service conditions and their resistance to ignition (see prEN ISO 11114-2, EN ISO 11114-3 and EN 849).

(continued)

23

ISO 11114-1 :1997{E) elSO

Table 1 (continued)

Gas number Key compatibility characteristics Materials

Name Cylinder Valve Formula A NR A NR 83 PHOSGENE In wet conditions phosgene is corrosive NS AA B AA COCI2 with most of the materials particularly QTS CS

aluminium alloys (hydrolyzes to HCI). SS S8

84 PHOSPHINE Because of risk of hydrogen NS B PH3 embrittlement special QTS and NS with a ars cs

limitation on the maximum strength shall AA SS be used. (see 5.3). SS AA Some 55 alloys (e.g. AIS1304) can be sensitive to hydrogen embrittlement. Risk of corrosion by impurities in the wet conditions shall be considered.

85 PROPANE No reaction with any com mon materials; NS B C3Ha however in wet conditions risk of aTS CS

corrosion from impurities shall be AA SS considered. S8 AA

86 PROPADIENE No reaction with any common materials; NS B

C3H4 however in wet conditions risk of aTS CS corrosion from impurities shall be AA SS conSidered. S5 AA

87 PROPYLENE No reaction with any common materials : NS B C3Ha however in wet conditions risk of QTS CS

corrosion from impurities shall be AA SS considered. 5S AA

(continued)

24

©ISO ISO 11114-1 :1997(E)

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 88 PROPYLENE Propylene oxide polymerizes. The rate of NS B OXIDE polymerization increases in the presence QTS CS C3H60 of mOisture, rust, and other contaminants. AA S8

Use a clean dry cylinder. Copper is not SS AA recommended.

89 SILANE Because of risk of hydrogen embritUement NS B SiH4 speCial aTS and NS with a limitation on ars cs

the maximum strength shall be used.(see AA SS 5.3). 55 AA Some SS alloys (e.g. AISI 304) ca.n be sensitive to hydrogen embrittlement. Risk of corrosion by impurities in the wet conditions shall be considered.

90 SILICON Hydrolyzes to hydrogen chloride in contact NS AA B AA TETRACHLORIDE with moisture. In wet conditions see QTS CS SiCI4 specific risk of hydrogen chloride S8 SS

compatibility Le. severe corrosion of most of the materials.

91 SILICON Hydrolyzes to hydrogen fluoride in contact NS B TETRAFLUORIDE with moisture. In wet conditions see QTS CS SiF4 specific risk of hydrogen fluoride AA SS

compatibility i.e. severe corrosion of most SS AA of the materials.

(continued)

25

ISO 11114-1:1997(E) @ISO

Table 1 (continued)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 92 SULPHUR Highly hygroscopic. Sulphur dioxide NS B DIOXIDE hydrolyzes in presence of water to QTS CS S02 produce sulphurous acid which is highly AA SS

corrosive to steel. SS AA In wet conditions some SS alloys e.g. AISI 316 L are the most resistant. B might suffer stress corrosion, in long term wet conditions.

93 SULPHUR No reaction with any common materials in NS 8 HEXAFLUORIDE dry or wet conditions. QTS CS SFS AA SS

SS AA 94 ·SULPHUR In wet conditions, sulphur tetrafluoride is NS B TETRAFLUORIDE highly corrosive. SS AISI 316 L, Monel QTS CS

SF4 and Inconel can be used. AA 58 5S AA

95 TETRAFLUOROETH No reaction with any common materials NS B YLENE when dry. In the presence of water, slight QTS CS

,C2F4 risk of corrosion. AA SS (R1114) SS AA

96 TRICHLOROSILANE Hydrolyzes to hydrogen chloride in NS B SiHCI3 contact with moisture. In wet conditions QTS CS

see specific risk of hydrogen chloride AA SS compatibility i.e. severe corrosion of most SS AA of the materials.

97 TRICHLORO· No reaction with any common materials NS B TRIFLUOROETHANE when dry. In the presence of water, slight QTS cs C2CI3F3 risk of corrosion. AA SS (R113) SS AA

98 1,1,1 No reaction with any common materials . NS B TRIFLUOROETHANE when dry~ In the presence of water, slight QTS CS CH3CF3 risk of corrosion. AA 55 (R143a) SS AA

(continued)

26

©ISO ISO 11114-1 :1997(1:)

Table 1 (concluded)

Gas number Key compatibility characteristics Materials Name Cylinder Valve Formula A NR A NR 99 TRIMETHYLAMINE Risk of stress corrosion with brass and NS CS B (CH3)3N copper alloy valves due to atmospheric QTS 5S

moisture. AA AA SS

100 TUNGSTEN Hydrolyzes to hydrogen fluoride in contact NS AA CS AA HEXAFLUORIDE with moisture. In wet conditions see QTS 55 WFS specific risk of hyd rogen fluoride SS

compatibility i.e. severe corrosion of most of the materials and risk of hydrogen embrittle ment. Due to the highly corrosive nature nickel based alloys and nickel plated valves are recommended.

101 VINYL Risk of corrosion in wet conditions, S5 NS AA B AA BROMIDE can be affected depending on type. Brass aTS CS C2H3Br should contain < 70 °/0 copper due to SS SS (R1140B1) possibility of presence of acetylene as an

impurity and subsequent risk of formation of copper acetyl ide.

102 VINYL Risk of corrosion in wet conditions, SS NS AA B AA CHLORIDE can be affected depending on type. Brass aTS cs C2H3C1 should contain < 70 °/0 copper due to SS SS (R1140) possibility of presence of acetylene as an

impurity and subsequent risk of formation of copper acetyl ide.

103 VINYL Risk of corrosion in wet conditions, SS NS M B AA FLUORIDE can be affected depending on type. Brass QTS CS C2H3F should contain < 70 % copper due to SS 88 (R1141) possibility of presence of acetylene as an

impurity and subsequent risk of formation of copper acetylide.

104 XENON No reaction with any common materials in NS B Xe dry or wet conditions. QTS CS

SS SS AA AA

27

ISO 11114-1:1997(E)

Annex A (normative)

GasIMaterials NQSAB compatibility code

A.1 General

A five digit code allows a rating of the compatibility of each gas with five different classes of materials for use with gas cylinders and cylinder valves. This code is termed the "NQSAB Code" where N represents normalized and carbon steels, Q quenched and tempered steels, S stainless steels, A aluminium alloys and B brass, copper and nickel alloys. The degree of compatibility is identified by replacing the letter with the appropriate digit as described in A.2.

In AA the gases covered in this standard are divided into 11 groups depending on their compatibility with cylinder and valve materials.

A.2 Material classes and compatibility identification

A.2.1 Normalized and carbon steels (N)

o : Not recommended ;

1 : May be used but check table 1, key compatibility characteristics;

9 : Can be used at low strength to avoid hydrogen embrjttlement.

A.2.2 Quenched and tempered steels (Q)

o : Not recommended ;

1 : May be used but check table 1, key compatibility characteristics;

9 : Can be used at low strength to avoid hydrogen embrittlement.

A.2.3 Stainless steels (S)

o ; Not recommended ;

1 : May be used but check table 1, key Gompatibility characteristics ;

2 : High grade (316 L or equivalent) can be used;

9 : Use stable austenitic steels or high grade (316 L or equivalent) to avoid hydrogen embrittlement. .

@ISO

©ISO 15011114-1 :1997(E)

A.2.4 Aluminium Alloys (A)

o : Not recommended ;

1 : May be used but check table 1, key compatibility characteristics.

A.2.S Brass Copper and nickel alloys (8)

o : Not recommended ;

1 : May be used but check table 1, key compatibility characteristics;

2 : Use special corrosion resistant bronze or nickel alloys;

3 : Use Brass containing less than 70 % Cu.

A.3 NQSAB code

Table A.1 specifies the "NQSAB Code" for each gas. For gases where the compatibility rating 2, 3 or 9 are specified, refer also to table 1.

29

ISO 11114-1 :1997(E) @Isa

Table A.1 : list of gas with the corresponding compatibility NQSAB code

Name and gas number Formula N Q S A B 1 ACETYLENE C2H2 1 1 1 1 3

2 AMMONIA NH3 1 1 1 1 0

3 ARGON Ar 1 1 1 1 1

4 ARSINE AsH3 9 9 9 1 1

5 BORON TRICHLORIDE BCI3 1 1 2 0 2

6 BORON TRIFLUORIDE BF3 1 1 2 0 2

7 BROMOCHLORODIFLUOROMETHA NE

CBrCIF2 (R12Bl) 1 1 1 1 1

8 BROMOTRIFLUOROMETHANE CBrF3 (R13Bl) 1 1 1 1 1

9 BROMOTRIFLUOROETHYLENE C2BrF3 1 1 1 1 1

10 BUT ADI ENE w 1,3 H2C:CHCH:CH2 1 1 1 1 1

11 BUTADIENE - 1,2 H2C:C:CHCH3 1 1 1 1 1

12 BUTANE C4Hl0 1 1 1 1 1

13 BUTENE -1 CH3CH2CH:CH2 1 1 1 1 1

14 BUTENE - 2 (CIS) CH3CH:CHCH3 1 1 1 1 1

15 BUTENE-2 (TRANS) CHSCH:CHCH3 1 1 1 1 1

(continued)

30

©ISO ISO 11114-1 :1997(E)

Table A.1 (continued)

Name and JIas number Formula N a s A B 16 CARBON DIOXIDE CO2 1 1 1 1 1

17 CARBON MONOXIDE CO 1 1 1 1 1

18 CARBON TETRAFLUORIDE CF4 1 1 1 1 1

19 CARBONYL SULPHIDE COS 1 1 1 1 1

20 CHLORINE CI2 1 1 2 0 1

21 CHLORODIFLUOROMETHANE CHCIF2 (R22) 1 1 1 1 1

22 CHLOROMETHANE CH3C1 (R40) 1 1 1 0 1

23 CHLOROPENTAFLUOROETHANE C2C1Fs (R11S) 1 1 1 1 1

24 CHLOROTETRAFLUOROETHANE CCIF2-CHF2 1 1 1 1 1

25 CHLOROTRIFLUOROETHANE CH2CICF3 (R133a) 1 1 1 1 1

26 CHLOROTRIFLUOROETHYLENE C2C1F3 (R1113) 1 1 1 1 1

27 CHLOROTRIFLUOROMETHANE CCIF3 (R13) 1 1 1 1 1

28 CYCLOPROPANE C3H6 1 1 1 1 1

29 DEUTERIUM D2 9 9 9 1 1

30 DIBROMODIFLUOROMETHANE CBr2F2 (R12B2) 1 1 1 1 1

31 DIBROMOTETRAFLUOROETHANE C2Br2F4 (R114B2) 1 1 1 1 1

(continued)

31

ISO 11114-1 :1997(E) @Isa

Table A.1(continued)

Name and gas number Formula N Q S A B 32 DIBORANE B2H6 9 9 9 1 1

33 DICHLORODIFLUOROMETHANE CCI2F2 (R12) 1 1 1 1 1

34 DICHLOROFLUOROMETHANE CHCI2F (R21) 1 1 1 1 1

35 DICHLOROSILANE SiH2CI2 1 1 2 1 1

36 DICHLOROTETRAFLUOROETHANE C2CI2F4 (R114) 1 1 1 ·1 1

37 CYANOGEN C2N2 1 1 1 ,1 0

38 1,1 DIFlUORO-1 CHLOROETHANE CH3CCIF2 (R142b) 1 1 1 1 1

39 1,1 DIFLUOROETHANE CH3CHF2 (R1S2a) 1 1 1 1 1

40 1,1 DIFLUOROETHYLENE C2H2F2 (R 1132a) 1 1 1 1 3

41 DIMETHYL AMINE (CH3)2NH 1 1 1 1 a

42 DIMETHYL ETHER (CH3)20 1 1 1 1 1

43 DISILANE Si2H6 9 9 9 1 1

44 ETHANE C2H6 1 1 1 1 1

45 ETHYLAMINE C2H5NH2 1 1 1 1 0

46 ETHYL CHLORIDE C2HSC1 (R160) 1 1 1 ·0 1

47 ETHYLENE C2H4 1 l' 1 1 1

(continued)

32

<§lIsa ISO 11114-1 :1997(E)

Table A.1 (continued)

Name and98s number Formula N Q S A 8 48 ETHYLENE OXIDE C2H40 1 1 1 1 1

49 FLUORINE F2 1 1 2 0 1

50 FLUOROETHANE C2H5F (R161) 1 1 1 1 1

51 FLUOROMETHANE CH3F (R41) 1 1 1 1 1

52 TRIFLUOROMETHANE CHF3 (R23) 1 1 1 1 1

53 GERMANE GeH4 9 9 9 1 1

54 HELIUM He 1 1 1 1 1

55 HEXAFLUOROETHANE C2FS (R116) 1 1 1 1 1

56 HEXAFLUOROPROPENE C3FS (R1216) 1 1 1 1 1

57 HYDROGEN H2 9 9 9 1 1

58 HYDROGEN HBr 9 9 2 0 2 BROMIDE

59 HYDROGEN CHLORIDE Hel 9 9 2 0 2

60 HYDROGEN CYANIDE HeN 1 1 2 1 1

61 HYDROGEN FLUORIDE HF 9 9 2 0 2

62 HYDROGEN IODIDE HI 9 9 2 0 2

63 HYDROGEN SULPHIDE H2S 9 9 9 1 1

(continued)

33

ISO 11114-1:1997(E) ©ISO

Table A.1 (continued) .

Name and Qas number Formula N Q S A B 64 ISOBUTANE CH(CH3)3 1 1 1 1 1

65 ISOBUTYLENE CH2:C(CH3>2 1 1 1 1 1

66 KRYPTON Kr 1 1 1 1 1

67 METHANE CH4 1 1 1 1 1

68 PROPYNE C3H4 1 1 1 1 3

69 METHYL BROMIDE CH3Br (R40B 1) . 1 1 2 0 2

70 METHYL MERCAPTAN CH3SH 9 9 9 1 1

71 METHYL SILANE CH3SiH3 9 9 9 1 1

72 METHYLAMINE CHSNH2 1 1 1 1 0

73 NEON Ne 1 1 1 1 1

74 NITRIC OXIDE NO 1 1 2 1 0

75 NITROGEN N2 1 1 1 1 1

76 NITROGEN DIOXIDE N02 1 1 2 1 0

77 NITROUS OXIDE N20 1 1 1 1 1

78 NITROGEN TRIFLUORIDE NF3 1 ·1 1 1 1

79 OCTAFLUORO·2 BUTENE C4FS 1 1 1 1 1

(continued)

34

©ISO ISO 11114-1:1991(E)

Table A.1 (continued)

Name and _gas number Formula N Q S A B 80 OCTAFLUOROCYCLOBUTANE C4FS (RC318) 1 1 1 1 1

81 OCTAFLUOROPROPANE C3Fa (R218) 1 1 1 1 1

82 OXYGEN

°2 1 1 1 1 1

83 PHOSGENE COCI2 1 1 2 0 1

84 PHOSPHINE PH3 9 9 9 1 1

85 PROPANE C3Ha 1 1 1 1 1

86 PROPADIENE CSH4 1 1 1 1 1

87 PROPYLENE C3HS 1 1 1 1 1

88 PROPYLENE OXIDE C3HSO 1 1 1 1 1

89 SILANE SiH4 9 9 9 1 1

90 SILICON TETRACHLORIDE SiCI4 1 1 2 1 1

91 SILICON TETRAFLUORIDE SiF4 1 1 2 1 1

92 SULPHUR DIOXIDE 802 1 1 1 1 1

93 SULPHUR HEXAFLUORIDE SF6 1 1 1 1 1

94 SULPHUR TETRAFLUORIDE SF4 1 1 2 1 1

95 TETRAFLUOROETHYLENE C2F4 (R1114) 1 1 1 1 1

(continued)

35

ISO 11114--1 :1997(E) @Isa

Table A.1 (concluded)

Name and gas number Formula N Q S A B 96 TRICHLOAOSILANE SiHCI3 1 1 2 1 1

97 TRICHLOROTRIFLUOROETHANE C2CI3F3 (R113) 1 1 1 1 1

98 1,1,1 TRIFLUOROETHANE CH3CF3 (R143a) 1 1 1 1 1

99 TRIMETHYLAMINE (CH3)3N 1 1 1 1 0

100 TUNGSTEN HEXAFLUORIDE WF6 1 1 2 0 1

101 VINYL BROMIDE C2H3Br (R1140B1) 1 1 2 0 3

102 VINYL CHLORIDE C2H3C1 (R1140) 1 1 2 0 3

103 VINYL FLUORIDE C2H3F (R1141) 1 1 2 0 3

104 XENON Xe 1 1 1 1 1

36

©Isa ISO 11114-1 :1997(E)

A.4 Groups of gases

In tables A.2 to A.12 gases are grouped by their compatibility with cylinder and valve materials as follows:

Group 1 : Gases compatible with all materials (code 11111).

Group 2 : Gases compatible with all materials but requiring steels compatible for hydrogen embrittlement (code 99911).

Group 3: Gases compatible with all materials but requiring alloys containing less than 70 0/0 of copper (code 11113).

Group 4 : Gases compatible with all materials but requiring high grade stainless steels (code 11211).

Group 5 : Gases compatible with all materials except brass (code 11110).

Group 6 : Gases compatible with all materials except brass and requiring high grade stainless steels (code 11210).

Group 7 : Gases compatible with all materials except aluminium (code 11101).

Group 8 : Gases compatible with all materials except aluminium and requiring high grade stainless steels (code 11201).

Group 9 : Gases compatible with all materials except aluminium and requiring high grade stainless steels and high grade bronze or nickel alloys (code 11202).

Group 10 : Gases compatible with all materials except aluminium and requiring high grade stainless steels and alloys containing less than 70 % of copper (code 11203).

Group 11 : Gases compatible with all materials except aluminium and requiring steels compatible with hydrogen embrittlement, high grade stainless steels and high grade bronze or nickel alloys (code 99202).

NOTE : All materials means materials covered in the standard.

37

ISO 11114-1 :1997(E) ©lSO

Table A.2 : Group 1

Gases compatible with all materials (Code 11111)

N° Gas name N° Gas name

3 Argon 47 Ethylene 7 Bromochlorodifluoromethane 48 Ethylene oxide 8 Bromotrifluoromethane 50 Fluoroethane 9 Bromotrifluoromethylene 51 Fluoromethane 10 Butadiene-1,3 52 Trifluoromethane 11 Butadiene-1 ,2 54 Helium 12 Butane 55 Hexafluoroethane 13 Butene-1 56 Hexafluoropropene 14 Butene-2 (cis) 64 Isobutane 15 Butene-2 (trans) 65 Isobutylene 16 Carbon dioxide 66 Krypton 17 Carbon monoxide 67 Methane 18 Carbon tetrafluoride 73 Neon 19 Carbonyl sulphide 75 Nitrogen 21 Chlorodifluoromethane 77 Nitrous oxide 23 Chloropentafluoroethane 78 Nitrogen trifluoride 24 Chlorotetrafluoroethane 79 Octafluoro-2-butene 25 Chlorotrifluoroethane 80 Octafluorocyclobutane 26 Chlorotrifluoroethylene 81 Octafluoropropane 27 Chlorotrifluoromethane 82 Oxygen 28 Cyclopropane 85 Propane 30 Dibromodifluoromethane 86 Propadiene 31 Dibromotetrafluoroethane 87 Propylene 33 Dichlorodifluoromethane 88 Propylene oxide 34 Dichlorofluoromethane 92 Sulphur dioxide 36 Dichlorotetrafluoroethane 93 Sulphur hexafluoride 38 1 ,1 Difluoro-1-chloroethane 95 Tetrafluoroethylene 39 1 ,1 Difluoroethane 97 Trichlorotrifluoroethane 42 Dimethyl ether 98 1 ,1,1 Trifluoroethane 44 Ethane 104 Xenon

38

©ISO ISO 11114-1:1997(E)

Table A.a : Group 2

Gases compatible with all materials, but requiring steels compatible for hydrogen embrittlement (Code 99911)

N° Gas name

4 Arsine

29 Deuterium

32 Diborane

43 Disilane

53 Germane

57 Hydrogen

63 Hydrogen sulphide

70 Methyl mercaptan

71 Methyl silane

84 Phosphine

89 Silane

Table A.4 : Group 3

Gases compatible with all materials but requiring copper alloys containing less than 70% Cu (Code 11113) N° Gas name

1 Acetylene

40 1,1 Difluoroethylene

68 Propyne

39

ISO 11114-1 :1997(E) @Isa

Table A.5 : Group 4

Gases compatible with all materials but requiring high grade stainless steels (Code 11211) N° Gas name

35 Dichlorosilane

60 Hydrogen cyanide

90 Silicon tetrachloride

91 Silicon tetrafluoride

94 Sulfphur tetrafluoride

96 Trichlorosilane

Table A.S : Group 5

Gases compatible with all materials except brass (Code 11110)

N° Gas name

2 Ammonia

37 Cyanogen

41 Dimethylamine

45 Ethylamine

72 Methylamine

99 Trimethylamine

40

@ISO ISO 11114-1:1997(E)

Table A.7 : Group 6

Gases compatible with all materials except brass and requiring high grade stainless steels (Code 11210)

N° Gas name

74 Nitric oxide

76 Nitrogen dioxide

Table A.8 : Group 7

Gases compatible with all materials except aluminium (Code 11101) N° Gas name

22 Chloromethane

46 Ethyl chloride

Table A.9 : Group 8

Gases compatible with all materials except aluminium and requiring high grade stainless steels (Code 11201) N° Gas name

20 Chlorine

49 Fluorine

83 Phosgene

100 Tungsten hexafluoride

41

ISO 11114-1 :1997(E) elsa

Table A.10 : Group 9

Gases compatible with all materials except aluminium and requiring high grade stainless steels and high grade bronze or nickel alloys (Code 11202) N° Gas name

5 Boron trichloride

6 Boron trifluoride

69 Methyl bromide

Table A.11 : Group 10

Gases compatible with all materials except aluminium and requiring high grade stainless steels and brass containing less than 70 % Cu (Code 11203) N° Gas name

101 Vinyl bromide

102 Vinyl chloride

103 Vinyl fluoride

Table A.12 : Group 11

Gases compatible with all materials except aluminium and requiring steels compatible with hydrogen embrittlement, high grade stainless steels and high grade bronze or nickel alloys (Code 99202) N° Gas name

58 Hydrogen bromide

59 Hydrogen chloride

61 Hydrogen fluoride

62 Hydrogen iodide

42

©ISO

AnnexZZ (informative)

ISO 11114-1 :1997(E)

Corresponding International and European Standards for which equivalents are not given in the text

At the time of publication of this part of ISO 11114, the edition of the following document was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 11114 are encouraged to investigate the possibility of applying the most recent edition of the document indicated below. Members of ISO and lEG maintain registers of currently valid International Standards.

EN 485-2 ISO 6361 ~2, Wrought aluminium and aluminium alloy sheets, strips and plates - Part 2: Mechanical properties.

43

ISO 11114-1 :1997(E) @ISO

les 23.020.30

Descriptors: gas pressure vessels, metal products, gas cylinders, gas valves, gases, compatibility, estimation, selection, rules (instructions).

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