IEC 61520:2000
(Main)Metal thermowells for thermometer sensors - Functional dimensions
Metal thermowells for thermometer sensors - Functional dimensions
Specifies functional dimensions for metal thermowells for thermo-meter sensors of nominal diameters ranging from 3 mm to 8 mm for use in process control.
The contents of the corrigendum of September 2017 have been included in this copy.
Doigts de gants métalliques pour capteurs de température - Dimensions fonctionnelles
Spécifie les dimensions fonctionnelles des doigts de gantsmétalliques pour capteurs de température de diamètre nominal compris entre 3 mm et 8 mm, destinés à une utilisation dans une application de contrôle-commande.
Le contenu du corrigendum de septembre 2017 a été pris en considération dans cet exemplaire.
General Information
- Status
- Published
- Publication Date
- 26-Jan-2000
- Technical Committee
- SC 65B - Measurement and control devices
- Drafting Committee
- WG 5 - TC 65/SC 65B/WG 5
- Current Stage
- PPUB - Publication issued
- Start Date
- 27-Jan-2000
- Completion Date
- 15-Feb-2000
Relations
- Corrected By
IEC 61520:2000/COR1:2017 - Corrigendum 1 - Metal thermowells for thermometer sensors - Functional dimensions - Effective Date
- 05-Sep-2023
Overview
IEC 61520:2000 is an international standard published by the International Electrotechnical Commission (IEC) that specifies the functional dimensions for metal thermowells used with thermometer sensors. These thermowells are designed for nominal sensor diameters ranging from 3 mm to 8 mm and are primarily intended for applications in process control environments. The 2000 edition includes a corrigendum update from September 2017, ensuring that the standard reflects the latest accepted amendments.
The primary goal of this standard is to define the geometric and functional dimensions of metal thermowells to facilitate interoperability and maintain safety and reliability under various industrial conditions. It provides detailed dimensional data for several thermowell types, helping manufacturers and users design, select, and install thermowells effectively.
Key Topics
Scope and Application: IEC 61520 addresses metal thermowells specifically for thermometer sensors with nominal diameters between 3 mm and 8 mm. It targets process control applications where accurate temperature measurement and sensor protection are critical.
Thermowell Types Defined:
- Type A: Threaded thermowell, standard length.
- Type B: Threaded thermowell, elongated design.
- Type C: Flanged thermowell.
- Type D: Welded thermowell.
Functional Dimensions:
- Specifies insertion length, outer and inner diameters, wall thickness, and threading dimensions.
- Provides detailed tables and diagrams illustrating external and internal configurations for each thermowell type.
Important Considerations:
- While IEC 61520 defines functional dimensions, factors such as wall and tip thickness must account for operational parameters including temperature, pressure, fluid flow velocity, medium type, and material strength.
- The natural frequency of the thermowell is also a critical factor to avoid resonance and mechanical failures.
Terminology and Definitions: Clear definitions help unify communication between suppliers, manufacturers, and end-users. Terms like insertion length (U) and thermowell types assist in standardizing specifications.
Applications
IEC 61520 metal thermowells are widely applied in industries requiring precise temperature control and monitoring under demanding conditions. Some typical applications include:
- Industrial Process Control: Thermowells protect sensors in chemical plants, oil refineries, and power generation facilities where temperature measurement must be reliable and stable.
- Petrochemical and Gas Industries: Protection of sensors in corrosive, high-pressure, or high-temperature environments.
- Manufacturing Automation: Integration with temperature sensors to maintain operational safety and efficiency.
- Energy and Utilities: Use in boilers, turbines, and cooling systems for temperature regulation.
- HVAC Systems: Accurate temperature measurement for climate control in large-scale systems.
By adhering to IEC 61520, organizations ensure compatibility and safety in installations, reduce risk of thermowell failure, and comply with international measurement standards.
Related Standards
- IEC 60050: International Electrotechnical Vocabulary providing general terminology used in electrotechnical fields.
- IEC 60027: Standard for letter symbols to be used in electrical technology.
- IEC 60417: Contains graphical symbols for use on equipment, useful for thermowell markings or documentation.
- IEC 60617: Graphical symbols for diagrams, relevant for schematic representations in technical diagrams involving thermowells and sensors.
Compliance with IEC 61520 complements these standards, facilitating clear communication, documentation, and integration of thermowell devices within broader electrotechnical and instrumentation systems.
Keywords: IEC 61520, metal thermowells, thermometer sensors, functional dimensions, process control, thermowell types, insertion length, temperature sensor protection, industrial temperature measurement, IEC standards.
Frequently Asked Questions
IEC 61520:2000 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Metal thermowells for thermometer sensors - Functional dimensions". This standard covers: Specifies functional dimensions for metal thermowells for thermo-meter sensors of nominal diameters ranging from 3 mm to 8 mm for use in process control. The contents of the corrigendum of September 2017 have been included in this copy.
Specifies functional dimensions for metal thermowells for thermo-meter sensors of nominal diameters ranging from 3 mm to 8 mm for use in process control. The contents of the corrigendum of September 2017 have been included in this copy.
IEC 61520:2000 is classified under the following ICS (International Classification for Standards) categories: 17.200.20 - Temperature-measuring instruments; 25.040.40 - Industrial process measurement and control. The ICS classification helps identify the subject area and facilitates finding related standards.
IEC 61520:2000 has the following relationships with other standards: It is inter standard links to IEC 61520:2000/COR1:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase IEC 61520:2000 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of IEC standards.
Standards Content (Sample)
NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Première édition
STANDARD
First edition
2000-01
Doigts de gants métalliques pour
capteurs de température –
Dimensions fonctionnelles
Metal thermowells for thermometer sensors –
Functional dimensions
Numéro de référence
Reference number
CEI/IEC 61520:2000
Numéros des publications Numbering
Depuis le 1er janvier 1997, les publications de la CEI As from 1 January 1997 all IEC publications are
sont numérotées à partir de 60000. issued with a designation in the 60000 series.
Publications consolidées Consolidated publications
Les versions consolidées de certaines publications de Consolidated versions of some IEC publications
la CEI incorporant les amendements sont disponibles. including amendments are available. For example,
Par exemple, les numéros d’édition 1.0, 1.1 et 1.2 edition numbers 1.0, 1.1 and 1.2 refer, respectively, to
indiquent respectivement la publication de base, la the base publication, the base publication incor-
publication de base incorporant l’amendement 1, et la porating amendment 1 and the base publication
publication de base incorporant les amendements 1 incorporating amendments 1 and 2.
et 2.
Validité de la présente publication Validity of this publication
Le contenu technique des publications de la CEI est The technical content of IEC publications is kept
constamment revu par la CEI afin qu'il reflète l'état under constant review by the IEC, thus ensuring that
actuel de la technique. the content reflects current technology.
Des renseignements relatifs à la date de reconfir- Information relating to the date of the reconfirmation
mation de la publication sont disponibles dans le of the publication is available in the IEC catalogue.
Catalogue de la CEI.
Les renseignements relatifs à des questions à l’étude et Information on the subjects under consideration and
des travaux en cours entrepris par le comité technique work in progress undertaken by the technical
qui a établi cette publication, ainsi que la liste des committee which has prepared this publication, as well
publications établies, se trouvent dans les documents ci- as the list of publications issued, is to be found at the
dessous: following IEC sources:
• «Site web» de la CEI* • IEC web site*
• Catalogue des publications de la CEI • Catalogue of IEC publications
Publié annuellement et mis à jour Published yearly with regular updates
régulièrement (On-line catalogue)*
(Catalogue en ligne)*
• Bulletin de la CEI
• IEC Bulletin
Disponible à la fois au «site web» de la CEI*
Available both at the IEC web site* and
et comme périodique imprimé
as a printed periodical
Terminologie, symboles graphiques
Terminology, graphical and letter
et littéraux
symbols
En ce qui concerne la terminologie générale, le lecteur
For general terminology, readers are referred to
se reportera à la CEI 60050: Vocabulaire Electro-
IEC 60050: International Electrotechnical Vocabulary
technique International (VEI).
(IEV).
Pour les symboles graphiques, les symboles littéraux
For graphical symbols, and letter symbols and signs
et les signes d'usage général approuvés par la CEI, le
approved by the IEC for general use, readers are
lecteur consultera la CEI 60027: Symboles littéraux à
referred to publications IEC 60027: Letter symbols to
utiliser en électrotechnique, la CEI 60417: Symboles
be used in electrical technology, IEC 60417: Graphical
graphiques utilisables sur le matériel. Index, relevé et
symbols for use on equipment. Index, survey and
compilation des feuilles individuelles, et la CEI 60617:
compilation of the single sheets and IEC 60617:
Symboles graphiques pour schémas.
Graphical symbols for diagrams.
* Voir adresse «site web» sur la page de titre.
* See web site address on title page.
NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Première édition
STANDARD
First edition
2000-01
Doigts de gants métalliques pour
capteurs de température –
Dimensions fonctionnelles
Metal thermowells for thermometer sensors –
Functional dimensions
IEC 2000 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
N
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
– 2 – 61520 © CEI:2000
SOMMAIRE
Pages
AVANT-PROPOS . 4
INTRODUCTION .6
Articles
1 Domaine d'application . 8
2 Termes et définitions. 8
3 Dimensions . 8
Figure 1 – Type A – Configuration extérieure . 10
Figure 2 – Type A – Configuration intérieure . 12
Figure 3 – Type B – Configuration extérieure . 16
Figure 4 – Type B – Configuration intérieure . 18
Figure 5 – Type C – Configuration extérieure . 22
Figure 6 – Type C – Configuration intérieure . 24
Figure 7 – Type D – Configuration extérieure . 26
Figure 8 – Type D – Configuration intérieure . 28
Tableau 1 – Type A – Longueurs . 10
Tableau 2 – Type A – Diamètres intérieurs. 12
Tableau 3 – Type A – Filetages extérieurs . 14
Tableau 4 – Type A – Filetages internes . 14
Tableau 5 – Type B – Longueurs . 16
Tableau 6 – Type B – Diamètres intérieurs. 18
Tableau 7 – Type B – Filetages extérieurs . 20
Tableau 8 – Type B – Filetages internes . 20
Tableau 9 – Type C – Longueurs . 22
Tableau 10 – Type C – Diamètres intérieurs. 24
Tableau 11 – Type C – Filetages internes . 24
Tableau 12 – Type D – Diamètres extérieurs et filetages internes. 26
Tableau 13 – Type D – Diamètres intérieurs. 28
61520 © IEC:2000 – 3 –
CONTENTS
Page
FOREWORD . 5
INTRODUCTION .7
Clause
1 Scope . 9
2 Terms and definitions. 9
3 Dimensions . 9
Figure 1 – Type A – External configuration. 11
Figure 2 – Type A – Internal configuration. 13
Figure 3 – Type B – External configuration. 17
Figure 4 – Type B – Internal configuration. 19
Figure 5 – Type C – External configuration. 23
Figure 6 – Type C – Internal configuration. 25
Figure 7 – Type D – External configuration. 27
Figure 8 – Type D – Internal configuration. 29
Table 1 – Type A – Lengths . 11
Table 2 – Type A – Inner diameters . 13
Table 3 – Type A – External threads . 15
Table 4 – Type A – Internal threads . 15
Table 5 – Type B – Lengths . 17
Table 6 – Type B – Inner diameters . 19
Table 7 – Type B – External threads . 21
Table 8 – Type B – Internal threads . 21
Table 9 – Type C – Lengths . 23
Table 10 – Type C – Inner diameters . 25
Table 11 – Type C – Internal threads . 25
Table 12 – Type D – External diameters and internal threads . 27
Table 13 – Type D – Inner diameters . 29
– 4 – 61520 © CEI:2000
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
DOIGTS DE GANTS MÉTALLIQUES POUR CAPTEURS DE TEMPÉRATURE –
DIMENSIONS FONCTIONNELLES
AVANT-PROPOS
1) La CEI (Commission Électrotechnique Internationale) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l'électricité et de l'électronique. A cet effet, la CEI, entre autres activités, publie des Normes internationales.
Leur élaboration est confiée à des comités d'études, aux travaux desquels tout Comité national intéressé par le
sujet traité peut participer. Les organisations internationales, gouvernementales et non gouvernementales, en
liaison avec la CEI, participent également aux travaux. La CEI collabore étroitement avec l'Organisation
Internationale de Normalisation (ISO), selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux intéressés
sont représentés dans chaque comité d’études.
3) Les documents produits se présentent sous la forme de recommandations internationales. Ils sont publiés
comme normes, spécifications techniques, rapports techniques ou guides et agréés comme tels par les Comités
nationaux.
4) Dans le but d'encourager l'unification internationale, les Comités nationaux de la CEI s'engagent à appliquer de
façon transparente, dans toute la mesure possible, les Normes internationales de la CEI dans leurs normes
nationales et régionales. Toute divergence entre la norme de la CEI et la norme nationale ou régionale
correspondante doit être indiquée en termes clairs dans cette dernière.
5) La CEI n’a fixé aucune procédure concernant le marquage comme indication d’approbation et sa responsabilité
n’est pas engagée quand un matériel est déclaré conforme à l’une de ses normes.
6) L’attention est attirée sur le fait que certains des éléments de la présente Norme internationale peuvent faire
l’objet de droits de propriété intellectuelle ou de droits analogues. La CEI ne saurait être tenue pour
responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.
La Norme internationale CEI 61520 a été établie par le sous-comité 65B: Dispositifs, du comité
d'études 65 de la CEI: Mesure et commande dans les processus industriels.
Le texte de cette norme est issu des documents suivants:
FDIS Rapport de vote
65B/391/FDIS 65B/395/RVD
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cette norme.
Cette publication a été rédigée selon les Directives ISO/CEI, Partie 3.
Le comité a décidé que le contenu de cette publication ne sera pas modifié avant 2007. A cette
date, la publication sera
• reconduite;
• supprimée;
• remplacée par une édition révisée, ou
• amendée.
Le contenu du corrigendum de septembre 2017 a été pris en considération dans cet
exemplaire.
61520 © IEC:2000 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
METAL THERMOWELLS FOR THERMOMETER SENSORS –
FUNCTIONAL DIMENSIONS
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61520 has been prepared by subcommittee 65B: Devices, of IEC
technical committee 65: Industrial-process measurement and control.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/391/FDIS 65B/395/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of September 2017 have been included in this copy.
– 6 – 61520 © CEI:2000
INTRODUCTION
La présente Norme internationale ne spécifie que les dimensions fonctionnelles des doigts de
gants métalliques. Lorsque l'on prend des décisions sur des questions telles que l'épaisseur de
la paroi ou de l'embout, il convient de prendre en compte les conditions d'exploitation telles
que la température, la pression, le débit, le fluide d'interface, ainsi que le matériau qui
constitue le doigt de gant et la fréquence propre
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