ISO 4266-3
(Main)Petroleum and liquid petroleum products — Measurement of level and temperature in storage tanks by automatic methods — Part 3: Measurement of level in pressurized storage tanks (non-refrigerated)
Petroleum and liquid petroleum products — Measurement of level and temperature in storage tanks by automatic methods — Part 3: Measurement of level in pressurized storage tanks (non-refrigerated)
ISO 4266-3 gives guidance on the accuracy, installation, commissioning, calibration and verification of automatic level gauges (ALGs) both intrusive and non-intrusive, for measuring the level of petroleum and petroleum products having a vapour pressure less than 4 MPa, stored in pressurized storage tanks. ISO 4266-3 gives guidance on the use of ALGs in custody transfer application. ISO 4266-3 is not applicable to the measurement of level in caverns and refrigerated storage tanks with ALG equipment.
Pétrole et produits pétroliers liquides — Mesurage du niveau et de la température dans les réservoirs de stockage par méthodes automatiques — Partie 3: Mesurage du niveau dans les réservoirs de stockage sous pression (non réfrigérés)
L'ISO 4266-3 constitue un guide relatif à la précision, à l'installation, à la mise en service, à l'étalonnage et à la vérification des jaugeurs automatiques de niveau de type intrusif et non intrusif, utilisés pour le mesurage de niveau du pétrole et des produits pétroliers, dont la tension de vapeur est inférieure à 4 MPa, et stockés dans des réservoirs de stockage sous pression. L'ISO 4266-3 constitue un guide relatif à l'utilisation des jaugeurs automatiques de niveau dans des transactions commerciales ou fiscales. L'ISO 4266-3 ne s'applique pas au mesurage de niveau par des jaugeurs automatiques, dans des stockages souterrains et dans des réservoirs de stockage réfrigérés.
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FINAL DRAFT
International
Standard
ISO/FDIS 4266-3
ISO/TC 28/SC 2
Petroleum and liquid petroleum
Secretariat: BSI
products — Measurement of level
Voting begins on:
and temperature in storage tanks by
2024-07-15
automatic methods —
Voting terminates on:
2024-09-09
Part 3:
Measurement of level in pressurized
storage tanks (non-refrigerated)
Pétrole et produits pétroliers liquides — Mesurage du niveau et
de la température dans les réservoirs de stockage par méthodes
automatiques —
Partie 3: Mesurage du niveau dans les réservoirs de stockage sous
pression (non réfrigérés)
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
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LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 4266-3:2024(en) © ISO 2024
FINAL DRAFT
ISO/FDIS 4266-3:2024(en)
International
Standard
ISO/FDIS 4266-3
ISO/TC 28/SC 2
Petroleum and liquid petroleum
Secretariat: BSI
products — Measurement of level
Voting begins on:
and temperature in storage tanks by
automatic methods —
Voting terminates on:
Part 3:
Measurement of level in pressurized
storage tanks (non-refrigerated)
Pétrole et produits pétroliers liquides — Mesurage du niveau et
de la température dans les réservoirs de stockage par méthodes
automatiques —
Partie 3: Mesurage du niveau dans les réservoirs de stockage sous
pression (non réfrigérés)
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 4266-3:2024(en) © ISO 2024
ii
ISO/FDIS 4266-3:2024(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative reference . 1
3 Terms and definitions . 1
4 Precautions . 2
4.1 Safety precautions .2
4.2 Equipment precautions .3
4.3 General precautions .3
5 Accuracy . 4
5.1 Intrinsic error of ALGs .4
5.2 Calibration prior to installation .4
5.3 Error caused by installation and operating conditions .4
5.4 Overall accuracy .4
5.4.1 General .4
5.4.2 Use of ALGs for fiscal/custody transfer applications .5
6 Installation of ALGs . 5
6.1 General .5
6.2 Mounting location .5
6.3 Manufacturer’s requirements .5
6.4 Installation .6
6.4.1 Installation of intrusive ullage ALGs mounted on still-wells .6
6.4.2 Installation of intrusive ullage ALGs using guide wires .7
6.4.3 Installation of non-intrusive ullage ALGs (e.g. microwave or radar) mounted on
still-wells .8
6.4.4 Location of ALG .10
6.4.5 Installation of ALGs other than those described in this document .10
6.5 Still-well design .10
7 Initial setting and initial verification of ALGs in the field .10
7.1 Preparation .10
7.1.1 Checking for critical distances .10
7.1.2 Checking for free movement of level-sensing element of intrusive ALGs.11
7.1.3 Checking for influences of changes in physical and electrical properties of the
product (vapour/liquid) . . . .11
7.2 Initial setting .11
7.2.1 General .11
7.2.2 Setting of intrusive ullage ALGs .11
7.2.3 Setting of non-intrusive ALGs. 12
7.2.4 Other ALGs not described in this document . 12
7.3 Initial field verification . 12
7.3.1 General . 12
7.3.2 V erification procedure . 13
7.3.3 Tolerance of initial field verification. 13
7.4 Record keeping . 13
8 Subsequent verification of ALGs .13
8.1 General . 13
8.2 Frequency of subsequent verification. 13
8.3 Procedure .14
8.4 Tolerance for subsequent verification of ALGs in fiscal/custody transfer application .14
8.5 Comparison of the ALG readings from current and previous verifications .14
8.6 Adjustment in subsequent verification . 15
9 Data communication and receiving .15
iii
ISO/FDIS 4266-3:2024(en)
Bibliography .16
iv
ISO/FDIS 4266-3:2024(en)
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
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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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information
...
ISO/DIS 4266-3:2024(E)
INTERNATIONAL STANDARD Style Definition: Heading 1: Indent: Left: 0 pt, First
line: 0 pt, Tab stops: Not at 21.6 pt
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ISO ISO/FDIS 4266--3
at 18 pt
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:2024-03(en)
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ISO/TC 28/SC 2
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Secretariat: BSI
Style Definition: ANNEX
Date: 2024-07-01
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Petroleum and liquid petroleum products — Measurement of level and temperature in
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storage tanks by automatic methods —
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Part 3:
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Measurement of level in pressurized storage tanks (non-refrigerated)
keep with next, Hyphenate, Tab stops: Not at 27 pt +
35 pt
Pétrole et produits pétroliers liquides — Mesurage du niveau et de la température dans les
réservoirs de stockage par méthodes automatiques —
Style Definition: IneraTableMultiPar: Font: 12 pt
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Partie 3: Mesurage du niveau dans les réservoirs de stockage sous pression (non réfrigérés)
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Formatted: French (Switzerland)
Formatted: Don't adjust space between Latin and
Asian text, Don't adjust space between Asian text and
numbers
Formatted: Font: Not Bold
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© ISO 2024 – All rights reserved
ISO/DIS 4266-3:2024(E)
Formatted: Centered
Formatted: Centered
© ISO 2024 – All rights reserved
ISO/DIS 4266-3:2024(E)
Formatted: Centered
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-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland.
Formatted: Centered
© ISO 2024 – All rights reserved
BS ISO 4266−3:2002
ISO/DIS 4266-3:2024(E)
Formatted: Header, Line spacing: single
Formatted: Font: Bold, English (United States)
Contents
Foreword . ix
Petroleum and liquid petroleum products — Measurement of level and temperature in storage tanks by
automatic methods — Part 3: Measurement of level in pressurized storage tanks (non-
refrigerated) . 1
2 Scope . 1
3 Normative reference . 1
4 Terms and definitions . 1
5 Precautions . 2
5.1 Safety precautions . 2
5.2 Equipment precautions . 3
5.3 General precautions . 3
6 Accuracy . 4
6.1 Intrinsic error of ALGs . 4
6.2 Calibration prior to installation . 4
6.3 Error caused by installation and operating conditions . 4
6.4 Overall accuracy . 4
6.4.1 General . 4
6.4.2 Use of ALGs for fiscal/custody transfer applications . 4
7 Installation of ALGs . 5
7.1 General . 5
7.2 Mounting location . 5
7.3 Manufacturer’s requirements . 5
7.4 Installation . 5
7.4.1 Installation of intrusive ullage ALGs (e.g. float-operated and servo-operated type)
mounted on still-wells . 5
7.4.2 Installation of intrusive ullage ALGs (e.g. float and servo-operated types) using guide
wires 7
7.4.3 Installation of non-intrusive ullage ALGs (e.g. microwave or radar) mounted on still-
wells 9
7.4.4 Location of ALG . 11
7.4.5 Installation of ALGs other than those described in ISO 4266-3 . 11
7.5 Still-well design . 11
8 Initial setting and initial verification of ALGs in the field . 12
8.1 Preparation . 12
Formatted: Font: 1 pt
Formatted: Body Text, Line spacing: Multiple 0.06 li
ISO/DIS 4266-3:2024(E)
8.1.1 Check for critical distances . 12
8.1.2 Check for free movement of level-sensing element of intrusive ALGs . 13
8.1.3 Check for influences of changes in physical and electrical properties of the product
(vapour/liquid) . 13
8.2 Initial setting . 13
8.2.1 General . 13
8.2.2 Setting of intrusive ullage ALGs . 13
8.2.3 Setting of non-intrusive ALGs . 14
8.2.4 Other ALGs not described in ISO 4266-3 . 14
8.3 Initial field verification . 15
8.3.1 Introduction. Error! Bookmark not defined.
8.3.2 Verification procedure . 15
8.3.3 Tolerance of initial field verification . 15
8.4 7.4 Record keeping . 15
9 8 Subsequent verification of ALGs . 16
9.1 General . 16
9.2 Frequency of subsequent verification . 16
9.3 Procedure . 16
9.4 Tolerance for subsequent verification of ALGs in fiscal/custody transfer application . 16
9.5 Comparison of the ALG readings from current and previous verifications . 16
9.6 Adjustment in subsequent verification . 17
10 Data communication and receiving . 17
Bibliography . 18Foreword
............................................................................................................................................................................................................ v
1 Scope . 1
2 Normative reference . 1
3 Terms and definitions . 1
4 Precautions . 2
4.1 Safety precautions . 2
4.2 Equipment precautions . 3
4.3 General precautions . 3
5 Accuracy . 4
5.1 Intrinsic error of ALGs . 4
5.2 Calibration prior to installation . 4
BS ISO 4266−3:2002
ISO/DIS 4266-3:2024(E)
Formatted: Header, Line spacing: single
Formatted: Font: Bold, English (United States)
5.3 Error caused by installation and operating conditions . 4
5.4 Overall accuracy . 4
5.4.1 General . 4
5.4.2 Use of ALGs for fiscal/custody transfer applications . 4
6 Installation of ALGs .
...
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