ISO 19636:2019
(Main)Ships and marine technology — General requirements for inclinometers used for the determination of trim and list of LNG carriers
Ships and marine technology — General requirements for inclinometers used for the determination of trim and list of LNG carriers
This document provides general requirements for the accuracy, installation, calibration and verification of trim and list inclinometers used for the determination of trim and list of LNG carriers for the purpose of measuring on-board cargo level.
Navires et technologie maritime — Exigences générales relatives aux inclinomètres utilisés pour la détermination de l'assiette et la gîte des méthaniers
General Information
Buy Standard
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 19636
First edition
2019-02
Ships and marine technology —
General requirements for
inclinometers used for the
determination of trim and list of LNG
carriers
Navires et technologie maritime — Exigences générales relatives aux
inclinomètres utilisés pour la détermination de l'assiette et liste des
méthaniers
Reference number
©
ISO 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Safety precautions . 2
4.1 Existing safety regulations, standards and classification societies rules . 2
4.2 Equipment precautions . 2
5 Design requirements . 3
5.1 General . 3
5.2 A Trim and list inclinometer’s axes and range . 3
5.3 Communication methods . 3
5.3.1 Analogue current interface type . 3
5.3.2 Digital interface type . 3
5.4 Levelling of a trim and list inclinometer . 3
5.5 A trim and list inclinometer’s protection box . 4
5.6 Sealing, security and unsealing . 4
5.7 Marking serial number . 4
6 Installation . 5
6.1 General . 5
6.2 Installation of a trim and list inclinometer . 5
6.3 Alignment of a trim and list inclinometer . 5
6.4 Alignment of a trim and list inclinometer — Ship at dry dock . 6
6.5 Installation of a trim and list inclinometer — Ship at floating dock . 6
6.6 Installation of a trim and list inclinometer — Ship anchored or moored . 7
7 Accuracy . 8
7.1 General . 8
7.2 Uncertainty of a Trim and List inclinometer's inherent error - Factory acceptance
test (FAT) . 8
7.3 Uncertainty of reference standard -Site acceptance test (SAT) . 8
7.4 Integrated overall accuracy . 9
8 Verification test and certification . 9
8.1 General . 9
8.2 Visual examination . 9
8.3 Verification test . .10
8.4 Sealing .10
8.5 Certificate .10
Annex A (informative) Verification of alignment for trim and list inclinometers .11
Bibliography .13
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. 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. 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 of 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 www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 8, Ship design.
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 © ISO 2019 – All rights reserved
Introduction
Inclinometers are used to determine the trim and list of various types of ships floating on the water.
In the case of liquefied natural gas carriers (LNG carriers), on which a large quantity of LNG is traded,
based on the results of static measurement, determination of trim and list, along with other elements, is
particularly important because the measurement of the liquid level of a cargo tank is inevitably affected
by the ship’s inclination.
This document provides general requirements for the accuracy, installation, calibration and
verification of inclinometers used for the determination of trim and list of LNG carriers, but is not
intended to preclude the use or development of any other technologies or methods or the revision of
the methods presented. Users of this document are encouraged to review, in detail, the latest editions
of the publications, standards and documents referenced in this document in order to gain a better
understanding of the methods described.
Users of this document should consider the applicable safety or operating practices recommended by
organizations, such as the International Maritime Organization (IMO), the International Chamber of
Shipping (ICS), the Oil Companies International Marine Forum (OCIMF), the International Group of
LNG Importers (GIIGNL) and the Society of International Gas Tanker and Terminal Operators (SIGTTO),
or individual operating companies, as well as any other safety or environmental considerations, local
regulations or the specific provisions of any contract.
INTERNATIONAL STANDARD ISO 19636:2019(E)
Ships and marine technology — General requirements for
inclinometers used for the determination of trim and list of
LNG carriers
1 Scope
This document provides general requirements for the accuracy, installation, calibration and verification
of trim and list inclinometers used for the determination of trim and list of LNG carriers for the purpose
of measuring on-board cargo level.
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
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
custody transfer measurement system
CTMS
system that processes inputs from an ATG (automatic tank gauge) system, thermometers, pressure
gauges, etc., and provides custody transfer measurement information on board, generating documents
with regard to custody transfer of LNG
Note 1 to entry: CTMS components include:
a) automatic level gauge system (radar, microwave, capacitance and float types),
b) automatic temperature gauge,
c) automatic pressure gauge,
d) trim and list indication system
Note 2 to entry: A trim and List inclinometer system can be typically incorporated as part of a CTMS.
Note 3 to entry: See Figure 1.
Key
1 trim and list inclinometer 4 connection/control box
2 sensor 5 custody transfer system (cts) unit
3 protection box 6 trim and list indicator
Figure 1 — Outline of trim and list inclinometer system
3.2
trim and list inclinometer
inclinometer used to determine the trim and list of LNG carriers
3.3
inherent error
error of a trim and list inclinometer when it is tested and verified against a re
...
INTERNATIONAL ISO
STANDARD 19636
First edition
2019-02
Ships and marine technology —
General requirements for
inclinometers used for the
determination of trim and list of LNG
carriers
Navires et technologie maritime — Exigences générales relatives aux
inclinomètres utilisés pour la détermination de l'assiette et liste des
méthaniers
Reference number
©
ISO 2019
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Safety precautions . 2
4.1 Existing safety regulations, standards and classification societies rules . 2
4.2 Equipment precautions . 2
5 Design requirements . 3
5.1 General . 3
5.2 A Trim and list inclinometer’s axes and range . 3
5.3 Communication methods . 3
5.3.1 Analogue current interface type . 3
5.3.2 Digital interface type . 3
5.4 Levelling of a trim and list inclinometer . 3
5.5 A trim and list inclinometer’s protection box . 4
5.6 Sealing, security and unsealing . 4
5.7 Marking serial number . 4
6 Installation . 5
6.1 General . 5
6.2 Installation of a trim and list inclinometer . 5
6.3 Alignment of a trim and list inclinometer . 5
6.4 Alignment of a trim and list inclinometer — Ship at dry dock . 6
6.5 Installation of a trim and list inclinometer — Ship at floating dock . 6
6.6 Installation of a trim and list inclinometer — Ship anchored or moored . 7
7 Accuracy . 8
7.1 General . 8
7.2 Uncertainty of a Trim and List inclinometer's inherent error - Factory acceptance
test (FAT) . 8
7.3 Uncertainty of reference standard -Site acceptance test (SAT) . 8
7.4 Integrated overall accuracy . 9
8 Verification test and certification . 9
8.1 General . 9
8.2 Visual examination . 9
8.3 Verification test . .10
8.4 Sealing .10
8.5 Certificate .10
Annex A (informative) Verification of alignment for trim and list inclinometers .11
Bibliography .13
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. 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. 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 of 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 www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 8, Ship design.
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 © ISO 2019 – All rights reserved
Introduction
Inclinometers are used to determine the trim and list of various types of ships floating on the water.
In the case of liquefied natural gas carriers (LNG carriers), on which a large quantity of LNG is traded,
based on the results of static measurement, determination of trim and list, along with other elements, is
particularly important because the measurement of the liquid level of a cargo tank is inevitably affected
by the ship’s inclination.
This document provides general requirements for the accuracy, installation, calibration and
verification of inclinometers used for the determination of trim and list of LNG carriers, but is not
intended to preclude the use or development of any other technologies or methods or the revision of
the methods presented. Users of this document are encouraged to review, in detail, the latest editions
of the publications, standards and documents referenced in this document in order to gain a better
understanding of the methods described.
Users of this document should consider the applicable safety or operating practices recommended by
organizations, such as the International Maritime Organization (IMO), the International Chamber of
Shipping (ICS), the Oil Companies International Marine Forum (OCIMF), the International Group of
LNG Importers (GIIGNL) and the Society of International Gas Tanker and Terminal Operators (SIGTTO),
or individual operating companies, as well as any other safety or environmental considerations, local
regulations or the specific provisions of any contract.
INTERNATIONAL STANDARD ISO 19636:2019(E)
Ships and marine technology — General requirements for
inclinometers used for the determination of trim and list of
LNG carriers
1 Scope
This document provides general requirements for the accuracy, installation, calibration and verification
of trim and list inclinometers used for the determination of trim and list of LNG carriers for the purpose
of measuring on-board cargo level.
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
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
custody transfer measurement system
CTMS
system that processes inputs from an ATG (automatic tank gauge) system, thermometers, pressure
gauges, etc., and provides custody transfer measurement information on board, generating documents
with regard to custody transfer of LNG
Note 1 to entry: CTMS components include:
a) automatic level gauge system (radar, microwave, capacitance and float types),
b) automatic temperature gauge,
c) automatic pressure gauge,
d) trim and list indication system
Note 2 to entry: A trim and List inclinometer system can be typically incorporated as part of a CTMS.
Note 3 to entry: See Figure 1.
Key
1 trim and list inclinometer 4 connection/control box
2 sensor 5 custody transfer system (cts) unit
3 protection box 6 trim and list indicator
Figure 1 — Outline of trim and list inclinometer system
3.2
trim and list inclinometer
inclinometer used to determine the trim and list of LNG carriers
3.3
inherent error
error of a trim and list inclinometer when it is tested and verified against a re
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.