ISO 16792:2015

DRAFT INTERNATIONAL STANDARD ISO/DIS 16792
ISO/TC 10 Secretariat: SIS
Voting begins on Voting terminates on

2012-11-01 2013-04-01
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  •  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  •  ORGANISATION INTERNATIONALE DE NORMALISATION


Technical product documentation — Digital product definition
data practices
Documentation technique de produits — Données de définition d'un produit
[Revision of first edition (ISO 16792:2006)]
ICS 01.110; 35.240.10









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This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.

To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.



THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
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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 SUPPORTING DOCUMENTATION.
©  International Organization for Standardization, 2012

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ISO/DIS 16792

Copyright notice
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ii © ISO 2012 – All rights reserved

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ISO/DIS 16792
Contents Page
Foreword .vi
Introduction.vii
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Data set identification and control .2
4.1 General .2
4.2 Related data .3
4.3 Data management.3
5 Data set requirements.4
5.1 General .4
5.1.1 Fundamental requirements .4
5.1.2 Design model requirement .5
5.2 General model requirements.5
5.2.1 Associativity .5
5.2.2 Model coordinate systems .6
5.2.3 Applications of supplemental geometry.7
5.2.4 Workpiece features not fully modelled .8
5.3 General method requirements .8
5.3.1 Data set methods.8
5.3.2 Model-only.8
5.3.3 Model and drawing.9
5.4 Management data .9
5.4.1 General .9
5.4.2 Management data in the data set.9
5.4.3 Management data on a model .10
5.5 Protection marking.10
5.5.1 General .10
5.5.2 Location on models.10
5.6 Views on models .10
6 Design model requirements .13
6.1 General .13
6.2 Geometric scale, units and precision.13
6.3 Model completeness .13
6.4 Assembly model completeness.13
6.5 Installation model completeness.14
7 Common requirements for product definition data .14
7.1 General .14
7.2 Common requirements .14
7.2.1 Display management.14
7.2.2 Screen dump.16
7.3 Model requirements .16
7.3.1 General .16
7.3.2 Associativity .17
7.3.3 Attributes.19
7.3.4 Annotation planes .20
7.3.5 Leader lines.21
7.3.6 Direction dependent tolerances.21
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ISO/DIS 16792
7.3.7 Indicating limited application of a tolerance. 22
7.3.8 Query types . 22
7.4 Drawing requirements. 26
7.4.1 General. 26
7.4.2 Orthographic views . 27
7.4.3 Axonometric views . 27
8 Notes and special notations. 30
8.1 Common requirements . 30
8.1.3 Flagnote . 30
8.2 Model requirements. 30
8.3 Drawing requirements. 31
9 Model values and dimensions. 31
9.1 General. 31
9.2 Common requirements . 31
9.2.1 Model value queries . 31
9.2.2 Resolved dimensions. 31
9.2.3 Plus and minus tolerances . 32
9.3 Model requirements. 32
9.3.1 General. 32
9.3.2 Theoretically exact and nominal dimensions. 32
9.3.3 Size values. 33
9.3.4 Coded size tolerances. 34
9.3.5 General applications of plus and minus tolerances . 34
9.3.6 Chamfers . 34
9.3.7 Depth specification. 38
9.4 Drawing requirements. 41
10 Datum applications. 41
10.1 General. 41
10.2 Common requirements . 41
10.3 Model requirements. 41
10.3.1 Datum systems and model coordinate systems . 41
10.3.2 Identification of datums . 43
10.3.3 Associativity of datum features and design data. 46
10.3.4 Datum target identification and attachment . 46
10.3.5 Multiple features establishing a datum . 48
10.4 Drawing requirements. 55
11 Geometric tolerances . 55
11.1 General. 55
11.2 Common requirements . 55
11.3 Model requirements. 56
11.3.1 General. 56
11.3.2 Form tolerances. 56
11.3.3 Orientation tolerances. 62
11.3.4 Profile tolerances. 69
11.3.5 Location tolerances. 76
11.3.6 Runout tolerances . 82
11.4 Drawing requirements. 87
11.4.1 General. 87
11.4.2 Requirements applicable to all geometric tolerances . 88
11.4.3 Form tolerances. 88
11.4.4 Orientation tolerances. 91
11.4.5 Profile tolerances. 91
11.4.6 Position tolerances. 93
11.4.7 Runout tolerances on a drawing. 93
12 Welds. 93
12.1 General. 93
12.2 Common requirements . 93
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ISO/DIS 16792
12.2.1 Application of supplemental geometry.93
12.2.2 Arrow lines .93
12.3 Model requirements .94
12.3.1 Annotation plane .94
12.3.2 Associativity .94
12.3.3 Indicating extents of the weld .94
12.3.4 Query of weld path .95
12.4 Drawing requirements.96
13 Surface Texture .96
13.1 General.96
13.2 Common requirements .96
13.3 Model requirements .96
13.3.1 Display Techniques.96
13.3.2 Annotation plane .98
13.3.3 Associativity .98
13.3.4 Indication of direction of lay .98
13.3.5 Use of all around indication .99
13.4 Drawing requirements.100
Annex A (informative) Classification codes for drawings and data sets .101
A.1 General.101
A.2 Application.101
A.3 Definitions .101
A.4 Classification code requirements.102
A.4.1 General.102
A.4.2 Classification code location.102
A.4.3 Approval indicators.102
A.4.4 Classification code 1.102
A.4.5 Classification code 2.102
A.4.6 Classification code 3.103
A.4.7 Classification code 4.103
A.4.8 Classification code 5.103
Bibliography.104

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ISO/DIS 16792
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16792 was prepared by Technical Committee ISO/TC 10, Technical product documentation.
This second edition cancels and replaces the first edition (ISO 167925:2006), which has been technically
revised mainly to incorporate the technical changes in ISO 1101:2012 and ISO 5459:2011. Clause 12 on
indication for welds and Clause 13 on indications for surface texture have been added. A new informative
Annex on classification codes has also been added.
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ISO/DIS 16792
Introduction
Every effort was made during the preparation of this International Standard — adapted from
ASME Y14.41:2003 — to apply existing requirements developed for two-dimensional (2-D) presentation
equally to the output from three-dimensional (3-D) models. Where new Geometrical Product Specification
(GPS) rules have proved essential, these have been drafted with a view to their being equally applicable to
both 2-D and 3-D. Therefore, in order to maintain the integrity of a single system, these new rules are being
incorporated in the relevant existing ISO standards for cross-reference. Application examples have been
included where, due to the specific requirements of 3-D modelling, additional guidance was deemed beneficial.
It is recognised that there is a need to support drawings in conjunction with 3 D models now and for the
foreseeable future. This need has been addressed in this International Standard through the definition of the
two methods for documenting digital models and specification of requirements to ensure that the information
in a data set is consistent between the model and the drawing.
The figures in this International Standard are intended only as illustrations to aid the user in understanding the
practices elaborated in the text. In some cases, figures show a level of detail as needed for emphasis; in
others, they are only complete enough to illustrate a concept or facet thereof. The absence of figures has no
bearing on the applicability of the specified requirement or practice.
In order to comply with the requirements of this International Standard, actual data sets will need to meet the
content requirements set forth in its text.
Most figures are illustrations of models in a 3-D environment. Figures illustrating drawings in digital format
include a border.
Text in uppercase letters used in the figures are intended to appear in digital product definition data, or data
sets; while that in lowercase letters is for information only and is not intended to appear in data sets.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 16792

Technical product documentation — Digital product definition
data practices
1 Scope
This International Standard specifies requirements for the preparation, revision and presentation of digital
product definition data, hereafter referred to as data sets. It supports two methods of application: model-only,
and model and drawing in digital format. Its structure presents requirements common to both methods
followed by clauses providing for any essential, differing requirements for each method. Additionally, its use in
conjunction with computer aided design (CAD) systems could assist in the progression towards improved
modelling and annotation practices for CAD and engineering disciplines, as well as serving as a guideline for
IT engineers.
The aspects specified in this International Standard refer mainly, but not exclusively, to requirements that
differ or are additional to those provided in existing, related standards. Where no such requirements are
identified, it is safe to assume that the appropriate existing ISO standards are instead applicable.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 128 (all parts), Technical drawings — General principles of presentation
ISO 129-1:2004, Technical drawings — Indication of dimensions and tolerances — Part 1: General principles
ISO 286 (all parts), I
...