Ships and marine technology — Specifications for gas detectors intended for use on board ships — Part 1: Portable gas detectors for atmosphere testing of enclosed spaces

ISO 19891-1:2017 provides specifications on performance, gases to be measured, sensitivities, indications, alarm levels, protection against shock, temperature and water ingress, and testing requirements of portable gas detectors used for atmosphere testing of enclosed spaces onboard ships prior to entry into those spaces. ISO 19891-1:2017 specifies suitable portable gas detectors for compliance with SOLAS regulation XI-1/7 "Atmosphere testing instrument for enclosed spaces", and may be used for deciding whether portable gas detectors available on the market are suitable for compliance with these SOLAS requirements. NOTE 1 SOLAS regulation XI-1/7 requires appropriate portable atmosphere testing instrument or instruments to be carried onboard ships, by 1 July 2016. The SOLAS regulation requires, as a minimum, the appropriate portable atmosphere testing instrument or instruments to be capable of measuring concentrations of oxygen, flammable gases or vapours, hydrogen sulphide and carbon monoxide prior to entry into enclosed spaces. For the purpose of measurement of concentrations of flammable gases or vapours, this document specifies the flammable gas as either "methane" or "propane and butane", and requires clear marking of types of flammable gases which can be measured by the portable gas detectors. Flammable vapours/gases which are not marked cannot be measured or detected by the portable gas detector. NOTE 2 Iso-butane is an alternative calibration gas of portable gas detectors in measuring propane and butane. ISO 19891-1:2017 does not give any indication of toxicity of the flammable gases.

Navires et technologie maritime — Spécifications pour les détecteurs de gaz destinés à être utilisés à bord des navires — Partie 1: Détecteurs de gaz portables pour les essais atmosphériques des espaces clos

General Information

Status
Published
Publication Date
24-Jul-2017
Current Stage
9020 - International Standard under periodical review
Due Date
15-Jul-2022
Completion Date
15-Jul-2022
Ref Project

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INTERNATIONAL ISO
STANDARD 19891-1
First edition
2017-07
Ships and marine technology —
Specifications for gas detectors
intended for use on board ships —
Part 1:
Portable gas detectors for atmosphere
testing of enclosed spaces
Navires et technologie maritime — Spécifications pour les détecteurs
de gaz destinés à être utilisés à bord des navires —
Partie 1: Détecteurs de gaz portables pour les essais atmosphériques
des espaces clos
Reference number
ISO 19891-1:2017(E)
ISO 2017
---------------------- Page: 1 ----------------------
ISO 19891-1:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

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copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 19891-1:2017(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Specification of portable gas detectors for atmosphere testing of enclosed spaces ......................2

4.1 General requirements ....................................................................................................................................................................... 2

4.1.1 Gases required to be measured ........................................................................................................................... 2

4.1.2 Method of measurement ........................................................................................................................................... 3

4.1.3 Basic performance .......................................................................................................................................................... 3

4.1.4 Portability .............................................................................................................................................................................. 4

4.2 Sensitivities, indications, and alarms .................................................................................................................................. 4

4.3 Robustness and electrical safety ............................................................................................................................................. 4

4.4 Marking and manual .......................................................................................................................................................................... 4

4.4.1 Marking .................................................................................................................................................................................... 4

4.4.2 Instruction manual ........................................................................................................................................................ 5

4.4.3 Testing ....................................................................................................................................................................................... 5

© ISO 2017 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 19891-1:2017(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 non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely 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 ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO’s adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: w w w . i s o .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,

Subcommittee SC 1, Lifesaving and fire protection.

This first edition of ISO 19891-1 cancels and replaces ISO/PAS 19891-1:2016, which has been technically

revised.

A list of all the parts in the ISO 19891 series, can be found on the ISO website.

iv © ISO 2017 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 19891-1:2017(E)
Introduction

This document specifies performance, gases to be measured, tolerances for gas measurement, and

testing requirements of portable gas detectors used for testing of the atmosphere in enclosed spaces

onboard ships prior to entry into those spaces, as required by SOLAS regulation XI-1/7 “Atmosphere

testing instrument for enclosed spaces”.

This document specifies the characteristics that portable gas detectors should be assessed against

items such as: which gases can be measured, sensitivities, indications, alarm levels, protection against

shock, temperature and water ingress, and additional requirements for spaces or areas where a risk of

explosion exists.

This document specifies the marine environmental conditions in which portable gas detectors are

expected to be used.

This document does not define differences between gases and vapours, nor does it give technical detail

on calculations and methodology for explosive limits and operational exposure levels. The intent of

this document is to simplify the subject to the essentials and use references for the actual scientific

standards if more detailed explanations are required.

Portable gas detectors conforming to this document should only be used onboard ships in accordance

with IMO requirements and procedures.

This document does not provide a specification on how to use portable gas detectors, or how to enter

enclosed spaces.
© ISO 2017 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 19891-1:2017(E)
Ships and marine technology — Specifications for gas
detectors intended for use on board ships —
Part 1:
Portable gas detectors for atmosphere testing of
enclosed spaces
1 Scope

This document provides specifications on performance, gases to be measured, sensitivities, indications,

alarm levels, protection against shock, temperature and water ingress, and testing requirements of

portable gas detectors used for atmosphere testing of enclosed spaces onboard ships prior to entry into

those spaces.

This document specifies suitable portable gas detectors for compliance with SOLAS regulation XI-1/7

“Atmosphere testing instrument for enclosed spaces”, and may be used for deciding whether portable

gas detectors available on the market are suitable for compliance with these SOLAS requirements.

NOTE 1 SOLAS regulation XI-1/7 requires appropriate portable atmosphere testing instrument or instruments

to be carried onboard ships, by 1 July 2016. The SOLAS regulation requires, as a minimum, the appropriate

portable atmosphere testing instrument or instruments to be capable of measuring concentrations of oxygen,

flammable gases or vapours, hydrogen sulphide and carbon monoxide prior to entry into enclosed spaces.

For the purpose of measurement of concentrations of flammable gases or vapours, this document

specifies the flammable gas as either “methane” or “propane and butane”, and requires clear marking

of types of flammable gases which can be measured by the portable gas detectors. Flammable

vapours/gases which are not marked cannot be measured or detected by the portable gas detector.

NOTE 2 Iso-butane is an alternative calibration gas of portable gas detectors in measuring propane and butane.

This document does not give any indication of toxicity of the flammable gases.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

IEC 60079-0, Explosive atmospheres — Part 0: Equipment — General requirements

IEC 60079-29-1, Explosive atmospheres — Part 29-1: Gas detectors — Performance requirements of

detectors for flammable gases

IEC 60079-29-2, Explosive atmospheres — Part 29-2: Gas detectors — Selection, installation, use and

maintenance of detectors for flammable gases and oxygen
IEC 60092-504, Electrical installations in ships — Part 5
...

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