ISO 128-3:2022
Technical product documentation (TPD) — General principles of representation — Part 3: Views, sections and cuts
This document specifies the general principles for presenting views, sections and cuts applicable to various kinds of technical drawings (e.g. mechanical, electrical, architectural, civil engineering), following the orthographic projection methods specified in ISO 5456-2. Views and sections for shipbuilding technical drawings are discussed in ISO 128-15. Views and sections for 3D models are discussed in ISO 16792.
Attention has also been given in this document to the requirements of reproduction, including microcopying in accordance with ISO 6428.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Basic conventions for views
4.1 General information on views
4.2 Choice of views
4.3 Partial views
4.4 Simplified view of symmetrical parts
4.5 First-angle projection method
4.6 First-angle projection method views
4.7 First-angle projection graphical symbol
4.8 Third-angle projection method
4.9 Third-angle projection method views
4.10 Third-angle projection graphical symbol
4.11 Other projection methods
4.12 Enlarged features
5 Reference indication for views and enlarged features
5.1 General
5.2 Details of the reference indication
5.3 Examples of indication
6 General information on cuts and sections
6.1 General
6.2 Indication of cuts and sections
6.2.1 Cutting plane
6.2.2 Identification of the cutting plane
6.2.3 Identification of the cuts and sections
6.2.4 Reference indication for cuts and sections
6.3 Sections revolved in the relevant view
6.4 Cuts/sections of symmetrical parts
6.5 Local cuts/sections
7 Basic conventions for representing areas on cuts and sections
7.1 General information on cuts and sections
7.2 Hatching
7.3 Shading or toning
7.4 Extra-wide continuous outlines
7.5 Thin sections
7.6 Thin adjacent sections
7.7 Specific materials
Annex A (normative) Graphical symbols
Annex B (informative) Former practices
Annex C (normative) Views on mechanical engineering technical drawings
Annex D (normative) Sections on mechanical engineering technical drawings
Annex E (normative) Projection methods in building technical drawings
Annex F (normative) Representation of views, sections and cuts on construction drawings
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Basic conventions for views
4.1 General information on views
4.2 Choice of views
4.3 Partial views
4.4 Simplified view of symmetrical parts
4.5 First-angle projection method
4.6 First-angle projection method views
4.7 First-angle projection graphical symbol
4.8 Third-angle projection method
4.9 Third-angle projection method views
4.10 Third-angle projection graphical symbol
4.11 Other projection methods
4.12 Enlarged features
5 Reference indication for views and enlarged features
5.1 General
5.2 Details of the reference indication
5.3 Examples of indication
6 General information on cuts and sections
6.1 General
6.2 Indication of cuts and sections
6.2.1 Cutting plane
6.2.2 Identification of the cutting plane
6.2.3 Identification of the cuts and sections
6.2.4 Reference indication for cuts and sections
6.3 Sections revolved in the relevant view
6.4 Cuts/sections of symmetrical parts
6.5 Local cuts/sections
7 Basic conventions for representing areas on cuts and sections
7.1 General information on cuts and sections
7.2 Hatching
7.3 Shading or toning
7.4 Extra-wide continuous outlines
7.5 Thin sections
7.6 Thin adjacent sections
7.7 Specific materials
Annex A (normative) Graphical symbols
Annex B (informative) Former practices
Annex C (normative) Views on mechanical engineering technical drawings
Annex D (normative) Sections on mechanical engineering technical drawings
Annex E (normative) Projection methods in building technical drawings
Annex F (normative) Representation of views, sections and cuts on construction drawings
Bibliography