ISO 128-3:2022 - Technical product documentation (TPD)—General principles of representation - Part 3 - Views, sections and cuts

Oct 29, 2026

ISO 128-3:2022 defines general principles for representing technical product documentation (TPD) in orthographic views. It focuses on views, sections and cuts, including basic conventions for views, criteria for selecting appropriate projection views, and treatment of partial views and simplified views of symmetrical parts. The standard also describes projection methods such as first-angle and third-angle, related graphical symbols, other projection approaches, and handling of enlarged features.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages15

Reading Time38 min

AccessFree to download

Scope

Normative references

Terms and definitions

Basic conventions for views

General information on views

Choice of views

Partial views

Simplified view of symmetrical parts

First-angle projection method

First-angle projection method views

First-angle projection graphical symbol

Third-angle projection method

Third-angle projection method views

Third-angle projection graphical symbol

Other projection methods

Enlarged features

INTERNATIONAL STANDARD ISO 128-3 Second edition 2022-08 Technical product documentation (TPD)—General principles of representation— Part 3: Views, sections and cuts iTeh STADNocueAntatRionDtechnPiquRe deEprVoduIitsE(TPWD)—Principesgénéraux dereprésentation— (staPnardtie: udes,se.cines hetc.opie ISO 128-3:2022 [https://standards.iteh.ai/catalog/standards/sist/75d888a5-6e9a-4fac-9120-8f2dffc20899/iso-](https://standards.iteh.ai/catalog/standards/sist/75d888a5-6e9a-4fac-9120-8f2dffc20899/iso-) 128-3-2022 Reference number ISO 128-3:2022(E) © ISO 2022 ISO 128-3:2022(E) iTeh STANDARD PREVIEW ( [standards.iteh.ai](standards.iteh.ai)) ISO 128-3:2022 [https://standards.iteh.ai/catalog/standards/sist/75d888a5-6e9a-4fac-9120-8f2dffc20899/iso-](https://standards.iteh.ai/catalog/standards/sist/75d888a5-6e9a-4fac-9120-8f2dffc20899/iso-) 128-3-2022 COPYRIGHT PROTECTED DOCUMENT © ISO 2022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication maybe 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](copyright@iso.org) [Website:](Website: www.iso.org)[ ](Website: www.iso.org)[www.iso.org](Website: www.iso.org)[ ](Website: www.iso.org)Published in Switzerland ii © ISO 2022 – All rights reserved ISO 128-3:2022(E) Contents Page Foreword........................................................................................................................................................................................................................................ iv Introduction .................................................................................................................................................................................................................................v 1 Scope ................................................................................................................................................................................................................................. 1 2 Normative references ..................................................................................................................................................................................... 1 3 Terms and definitions .................................................................................................................................................................................... 1 4 Basic conventions for views ..................................................................................................................................................................... 2 4.1 General information on views................................................................................................................................................... 2 4.2 Choice of views ....................................................................................................................................................................................... 3 4.3 Partial views............................................................................................................................................................................................. 3 4.4 Simplified view of symmetrical parts ............................................................................................................................... 4 4.5 First-angle projection method .......................................................................................................

FAQs

What does ISO 128-3:2022 cover in technical product documentation?

It covers general principles of representation with emphasis on views, sections and cuts for technical product documentation.

Which projection methods are described in the basic conventions for views?

The standard describes first-angle projection and third-angle projection methods, including their graphical symbols, and also mentions other projection methods.

How does the standard treat different types of views and features?

It includes guidance on partial views, simplified views of symmetrical parts, enlarged features, and related conventions for graphical representation.

Oct 29, 2026

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