Welding - General tolerances for welded constructions - Dimensions for lengths and angles, shape and position

This document specifies general tolerances for linear and angular dimensions and for shape and position of welded structures in four tolerance classes, based on customary workshop accuracy. The main criterion for selection of a particular tolerance class is based on the functional requirements which are to be met. The applicable tolerances are always those which are stated in the drawing. Instead of specifying individual tolerances the tolerance classes according to this document can be used. General tolerances for linear and angular dimensions and for shape and position as specified in this document apply for weldments, welding assemblies, welded structures, etc. Special provisions can be necessary for complex structures. The specifications given in this document are based on the independency principle of ISO 8015, according to which the dimensional and geometrical tolerances apply independently of each other. Manufacturing documentation in which linear and angular dimensions or indications for shape and position are presented without individually indicated tolerances shall be deemed incomplete if there is no, or inadequate, reference to general tolerances. This does not apply to temporary dimensions.

Soudage — Tolérances générales relatives aux constructions soudées — Dimensions des longueurs et angles, formes et positions

Le présent document spécifie quatre classes de tolérances générales relatives aux dimensions linéaires et angulaires ainsi qu'à la forme et à la position des structures soudées, basées sur la précision courante des ateliers. Le principal critère de choix d'une classe de tolérance particulière est fondé sur les exigences fonctionnelles qui doivent être satisfaites. Les tolérances applicables sont toujours celles qui sont indiquées sur le dessin. Les classes de tolérances mentionnées dans le présent document peuvent être utilisées à la place de tolérances spécifiées individuellement. Les tolérances générales relatives aux dimensions linéaires et angulaires ainsi qu´à la forme et à la position spécifiées dans le présent document s’appliquent aux constructions soudées, aux assemblages soudés, aux structures soudées, etc. Des dispositions spéciales peuvent être nécessaires pour les structures complexes. Les spécifications présentées dans le présent document sont fondées sur le principe d’indépendance de l'ISO 8015, d'après lequel les tolérances dimensionnelles et géométriques s'appliquent indépendamment les unes des autres. La documentation de fabrication dans laquelle les dimensions linéaires et angulaires ou des indications concernant la forme et la position sont présentées sans que les tolérances soient indiquées individuellement doit être considérée comme incomplète s'il n'est pas fait référence (ou s'il est fait référence de manière inadéquate) aux tolérances générales. Cela ne s'applique pas aux dimensions provisoires.

General Information

Status
Published
Publication Date
01-Jun-2023
Current Stage
6060 - International Standard published
Start Date
02-Jun-2023
Due Date
07-May-2024
Completion Date
02-Jun-2023

Relations

Effective Date
12-Nov-2022

Overview

ISO 13920:2023 - Welding - General tolerances for welded constructions - Dimensions for lengths and angles, shape and position - defines uniform, workshop-based tolerances for welded constructions. It specifies general tolerances for linear and angular dimensions and for shape and position (straightness, flatness, parallelism) in four tolerance classes. The standard is intended to be used on drawings as a convenient shorthand (e.g., ISO 13920-B or ISO 13920-BE) when individual tolerances are not specified.

Key topics and requirements

  • Tolerance classes: Four primary classes (A, B, C, D) for linear and angular tolerances, selectable based on functional requirements and customary workshop accuracy.
  • Form tolerances: Separate classes (e.g., E–H) for straightness, flatness and parallelism of surfaces and overall weldment dimensions.
  • Independency principle: Applies ISO 8015 - dimensional and geometrical tolerances are independent of one another.
  • Application scope: Applies to weldments, welding assemblies and welded structures; special provisions may be required for complex or large structures.
  • Drawing indications: The selected tolerance class must be shown on the manufacturing drawing; drawings without an adequate reference to general tolerances are deemed incomplete (except temporary dimensions).
  • Testing and measuring: Recommends commonly used measuring devices - straightedges, tape measures, vernier callipers (ISO 13385), dial gauges (ISO 463), optical devices, water levels and surface plates - and gives test methods for straightness, flatness and parallelism.
  • Non-conformities: Acceptance of parts not meeting ISO 13920 is determined by suitability for intended purpose; deviations may be accepted by agreement.

Practical applications and users

ISO 13920:2023 is practical for:

  • Welders and fabricators seeking clear production tolerances for shop work
  • Design and detailing engineers specifying tolerances on fabrication drawings
  • Quality, inspection and QA/QC personnel performing acceptance checks
  • Procurement and project managers ensuring contract clarity for welded components Common applications include structural steelwork, industrial equipment, frames, tanks and general welded assemblies where functional fit and workshop-level accuracy are required.

Related standards

  • ISO 8015 - Geometrical product specifications: fundamental independency principle.
  • ISO 1101 - Geometrical tolerancing for form and position (referenced for additional geometric symbols).
  • ISO 13385-1 / ISO 13385-2 and ISO 463 - Recommended metrological equipment standards for calipers and dial gauges.

Keywords: ISO 13920:2023, welding tolerances, welded constructions, tolerance classes, linear and angular dimensions, shape and position, straightness, flatness, parallelism, ISO 8015.

Standard

ISO 13920:2023 - Welding — General tolerances for welded constructions — Dimensions for lengths and angles, shape and position Released:2. 06. 2023

English language
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Standard

ISO 13920:2023 - Soudage — Tolérances générales relatives aux constructions soudées — Dimensions des longueurs et angles, formes et positions Released:2. 06. 2023

French language
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Frequently Asked Questions

ISO 13920:2023 is a standard published by the International Organization for Standardization (ISO). Its full title is "Welding - General tolerances for welded constructions - Dimensions for lengths and angles, shape and position". This standard covers: This document specifies general tolerances for linear and angular dimensions and for shape and position of welded structures in four tolerance classes, based on customary workshop accuracy. The main criterion for selection of a particular tolerance class is based on the functional requirements which are to be met. The applicable tolerances are always those which are stated in the drawing. Instead of specifying individual tolerances the tolerance classes according to this document can be used. General tolerances for linear and angular dimensions and for shape and position as specified in this document apply for weldments, welding assemblies, welded structures, etc. Special provisions can be necessary for complex structures. The specifications given in this document are based on the independency principle of ISO 8015, according to which the dimensional and geometrical tolerances apply independently of each other. Manufacturing documentation in which linear and angular dimensions or indications for shape and position are presented without individually indicated tolerances shall be deemed incomplete if there is no, or inadequate, reference to general tolerances. This does not apply to temporary dimensions.

This document specifies general tolerances for linear and angular dimensions and for shape and position of welded structures in four tolerance classes, based on customary workshop accuracy. The main criterion for selection of a particular tolerance class is based on the functional requirements which are to be met. The applicable tolerances are always those which are stated in the drawing. Instead of specifying individual tolerances the tolerance classes according to this document can be used. General tolerances for linear and angular dimensions and for shape and position as specified in this document apply for weldments, welding assemblies, welded structures, etc. Special provisions can be necessary for complex structures. The specifications given in this document are based on the independency principle of ISO 8015, according to which the dimensional and geometrical tolerances apply independently of each other. Manufacturing documentation in which linear and angular dimensions or indications for shape and position are presented without individually indicated tolerances shall be deemed incomplete if there is no, or inadequate, reference to general tolerances. This does not apply to temporary dimensions.

ISO 13920:2023 is classified under the following ICS (International Classification for Standards) categories: 17.040.10 - Limits and fits; 25.160.10 - Welding processes. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 13920:2023 has the following relationships with other standards: It is inter standard links to ISO 13920:1996. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase ISO 13920:2023 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 ISO standards.

Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 13920
Second edition
2023-06
Welding — General tolerances for
welded constructions — Dimensions
for lengths and angles, shape and
position
Soudage — Tolérances générales relatives aux constructions soudées
— Dimensions des longueurs et angles, formes et positions
Reference number
© ISO 2023
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General tolerances . 2
4.1 Tolerances for linear dimensions . 2
4.2 Tolerances for angular dimensions . 2
4.3 Straightness, flatness and parallelism tolerances . 4
5 Indications on drawings . 5
6 Testing. 5
6.1 General . 5
6.2 Straightness . 5
6.3 Flatness . 6
6.4 Parallelism. 6
7 Non-conformities . 7
Bibliography . 8
iii
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 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/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 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 44, Welding and allied processes,
Subcommittee SC 10, Quality management in the field of welding, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 121, Welding and allied processes,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 13920:1996), of which it constitutes a
minor revision. The main changes are as follows:
— references have been updated;
— presentation has been updated to the latest ISO styles.
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. Official
interpretations of ISO/TC 44 documents, where they exist, are available from this page:
https://committee.iso.org/sites/tc44/home/interpretation.html.
iv
INTERNATIONAL STANDARD ISO 13920:2023(E)
Welding — General tolerances for welded constructions —
Dimensions for lengths and angles, shape and position
1 Scope
This document specifies general tolerances for linear and angular dimensions and for shape and
position of welded structures in four tolerance classes, based on customary workshop accuracy. The
main criterion for selection of a particular tolerance class is based on the functional requirements
which are to be met.
The applicable tolerances are always those which are stated in the drawing. Instead of specifying
individual tolerances the tolerance classe
...


NORME ISO
INTERNATIONALE 13920
Deuxième édition
2023-06
Soudage — Tolérances générales
relatives aux constructions soudées —
Dimensions des longueurs et angles,
formes et positions
Welding — General tolerances for welded constructions —
Dimensions for lengths and angles, shape and position
Numéro de référence
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2023
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 1
4 Tolérances générales .2
4.1 Tolérances relatives aux dimensions linéaires . 2
4.2 Tolérances relatives aux dimensions angulaires . 3
4.3 Tolérances de rectitude, de planéité et de parallélisme . . 4
5 Indications sur les dessins .5
6 Essai . 5
6.1 Généralités . 5
6.2 Rectitude . 5
6.3 Planéité . 6
6.4 Parallélisme . 6
7 Non-conformités . 7
Bibliographie . 8
iii
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner
l’utilisation d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité
et à l’applicabilité de tout droit de brevet revendiqué à cet égard. À la date de publication du présent
document, l’ISO n'avait pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa
mise en application. Toutefois, il y a lieu d’avertir les responsables de la mise en application du présent
document que des informations plus récentes sont susceptibles de figurer dans la base de données de
brevets, disponible à l'adresse www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne
pas avoir identifié tout ou partie de tels droits de propriété.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 44, Soudage et techniques connexes,
sous-comité SC 10, Gestion de la qualité dans le domaine du soudage en collaboration avec le comité
technique CEN/TC 121, Soudage et techniques connexes, du Comité européen de normalisation (CEN),
conformément à l'Accord de coopération technique entre l'ISO et le CEN (Accord de Vienne).
Cette deuxième édition annule et remplace la première édition (ISO 13920:1996), dont elle constitue
une révision mineure. Les modifications sont les suivantes:
— mise à jour des référence normatives;
— mise à jour de la présentation suivant les derniers styles ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
Les interprétations officielles des documents élaborés par l'ISO/TC 44, lorsqu'elles existent sont
disponibles depuis la page: https://committee.iso.org/sites/tc44/home/interpretation.html.
iv
NORME INTERNATIONALE ISO 13920:2023(F)
Soudage — Tolérances générales relatives aux
constructions soudées — Dimensions des longueurs et
angles, formes et positions
1 Domaine d’application
Le présent document spécifie quatre classes de tolérances générales relatives aux dimensions linéaires
et angulaires ainsi qu'à la forme et à la position des structures soudées, basées sur la précision courante
des ateliers. Le principal critère de choix d'une classe de tolérance particulière est fondé sur les
exigences fonctionnelles qui doivent être satisfaites.
Les tolérances applicables sont toujours celles qui sont indiquées sur le dessin. Les classes de tolérances
mentionnées dans le présent document peuvent être utilisées à la place de tolérances spécifiées
individuellement.
Les tolérances générales relatives aux dimensions linéaires et angulaires ainsi qu´à la forme et à la
position spécifiées dans le présent document s’appliquent aux constructions soudées, aux assemblages
soudés, aux structures soudées, etc.
Des dispositions spéciales peuven
...

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記事タイトル: ISO 13920:2023 - 無縫継手のための一般公差 記事内容: この文書は、4つの公差クラスを基にした溶接構造物の線形および角度寸法、形状および位置の一般公差を定めています。特定の公差クラスを選択する主な基準は、満たす必要のある機能要件に基づいています。適用可能な公差は、常に図面に記載されているものです。この文書に規定された線形および角度寸法、形状および位置の一般公差は、溶接部品、溶接アセンブリ、溶接された構造物などに適用されます。複雑な構造物には特別な規定が必要な場合があります。本文書で指定された仕様は、ISO 8015の独立原則に基づいており、これにより寸法公差と形状公差が互いに独立して適用されるとされています。線形および角度寸法または形状および位置の表示に個別の公差が示されていない場合、または適切な参照がない場合、製造文書は不完全とみなされます。一時的な寸法にはこれは当てはまりません。

記事タイトル:ISO 13920:2023-溶接-溶接構造物の一般公差-長さおよび角度、形状および位置の寸法 記事内容:この文書は、線形および角度の寸法、形状および位置の一般公差を、通常の作業場の精度に基づいて、4つの公差クラスで規定しています。特定の公差クラスを選択する主要な基準は、満たすべき機能要件に基づいて決定されます。適用される公差は、常に図面に記載されているものです。この文書では、個別の公差を指定する代わりに、この文書に従って公差クラスを使用することができます。この文書で指定された線形および角度の寸法、形状および位置の一般公差は、溶接構成物、溶接組立物、溶接構造物などに適用されます。複雑な構造物には特別な規定が必要な場合があります。この文書で示された仕様は、ISO 8015の独立性の原則に基づいており、これにより寸法および幾何学的公差は互いに独立して適用されます。寸法や位置の指示が個別に示された公差が明示されていない場合、または十分な参照がない場合、製造文書は不完全と見なされます。一時的な寸法には当てはまりません。

ISO 13920:2023 is a document that sets out general tolerances for welded constructions. It provides tolerance classes based on workshop accuracy, with the selection of a particular class determined by the functional requirements of the structure. The tolerances stated in the drawing should be followed, but this document can be used as a guide instead of specifying individual tolerances. The tolerances apply to weldments, welding assemblies, and welded structures, although complex structures may require special provisions. The document is based on the independency principle of ISO 8015, which means that dimensional and geometrical tolerances are applied independently of each other. Manufacturing documentation should include references to these general tolerances for linear and angular dimensions, shape, and position, unless temporary dimensions are being used.

기사 제목: ISO 13920:2023 - 용접 - 용접 구조물의 일반 허용차원 - 길이 및 각도, 형태 및 위치에 대한 차원 기사 내용: 이 문서는 선형 및 각도 차원, 형태 및 위치에 대한 일반적인 허용차원을 네 가지 허용클래스에 대해 명시합니다. 이는 관습적인 작업장 정확성에 기반합니다. 특정 허용클래스를 선택하는 주요 기준은 만족시켜야 할 기능 요구 사항에 따라 결정됩니다. 적용 가능한 허용치는 항상 도면에 명시된 허용치입니다. 개별 허용치를 지정하는 대신 이 문서에 따른 허용클래스를 사용할 수 있습니다. 이 문서에서 명시된 선형 및 각도 차원, 형태 및 위치에 대한 일반 허용차원은 용접품, 용접 조립품, 용접 구조물 등에 적용됩니다. 복잡한 구조물의 경우 특별한 조항이 필요할 수 있습니다. 이 문서에 기재된 명세는 ISO 8015의 독립성 원칙에 기초하며, 이는 차원 및 기하학적 허용치가 서로 독립적으로 적용된다는 것을 의미합니다. 선형 및 각도 차원 또는 형태 및 위치 표시에 개별적으로 허용치가 지정되지 않은 제조 문서는 일반 허용치에 대한 언급이 없거나 불충분하다면 불완전한 것으로 간주됩니다. 단, 일시적인 차원은 해당되지 않습니다.

2023년 ISO 13920는 용접된 구조물에 대한 일반 허용차를 규정하는 문서입니다. 이 허용차는 차공 정확도에 따라 4가지 등급으로 분류되며, 기능적 요구사항에 따라 특정 등급이 선택됩니다. 이 문서에 명시된 허용차는 도면에 명시된 허용차와 일치해야 합니다. 이 문서에서 규정된 제작상 차공과 각도, 모양 및 위치에 대한 일반 허용차는 용접 조립체와 용접된 구조물 등에 적용됩니다. 복잡한 구조물에 대해서는 특수 조항이 필요할 수 있습니다. 이 문서에서 제시된 사양은 ISO 8015의 독립성 원칙에 기초합니다. 이는 치수 및 기하학적 허용차가 서로 독립적으로 적용된다는 것을 의미합니다. 선형 및 각도 치수 또는 모양 및 위치 표시에 개별적인 허용차가 표시되지 않은 제조 문서는 일반 허용차에 대한 언급이 부족하거나 없으면 불완전하다고 간주됩니다. 단, 임시 치수에는 해당하지 않습니다.

ISO 13920:2023 is a document that sets out general tolerances for welded structures. These tolerances are categorized into four classes based on workshop accuracy and functional requirements. The document specifies that the applicable tolerances should always be stated in the drawing. The tolerances outlined in the document are meant to apply to weldments, welding assemblies, and welded structures. Complex structures may require additional provisions. The document is based on the independency principle of ISO 8015, which means that dimensional and geometrical tolerances are considered separately. Manufacturing documentation should include reference to these general tolerances, unless temporary dimensions are being used.