SIST EN ISO 5455:1998
(Main)Technical drawings - Scales (ISO 5455:1979)
Technical drawings - Scales (ISO 5455:1979)
Indicates recommended scales and their designation for use in any field of engineering. Gives definitions for the scale types and relevant terms. The complete designation shall consists of the word "SCALE" (or its equivalent in the language used in the drawing) followed by the indication of its ratio.
Technische Zeichnungen - Maßstäbe (ISO 5455:1979)
Diese Norm gilt für Maßtäbe und deren Kennzeichnung in technischen Zeichnungen für alle Gebiete der Technik.
Dessins techniques - Echelles (ISO 5455:1979)
La présente Norme internationale spécifie les échelles recommandées, ainsi que leur désignation, à utiliser pour tous les dessins techniques dans tous les domaines de la technique.
Tehnične risbe - Merila
General Information
- Status
- Published
- Publication Date
- 30-Apr-1998
- Technical Committee
- TRS - Technical drawings, quantities, units, symbols and graphical symbols
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-May-1998
- Due Date
- 01-May-1998
- Completion Date
- 01-May-1998
Relations
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Referred By
SIST EN 61082-1:2006 - Preparation of documents used in electrotechnology -- Part 1: Rules - Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 09-Feb-2026
Overview
SIST EN ISO 5455:1998 - Technical Drawings: Scales is an international standard developed by CEN, based on ISO 5455:1979, that establishes guidelines for the selection, designation, and use of scales on technical drawings in all fields of engineering. This standard provides clear definitions of scale types, recommended scale ratios, and the proper method of scale inscription, ensuring clear communication and consistency in engineering documentation worldwide.
Key Topics
Recommended Scales: SIST EN ISO 5455:1998 sets out a table of preferred scale ratios for enlargement, full-size, and reduction on technical drawings. These include:
- Enlargement scales: 50:1, 20:1, 10:1, 5:1, 2:1
- Full size: 1:1
- Reduction scales: 1:2, 1:5, 1:10, 1:20, 1:50, 1:100, 1:200, 1:500, 1:1000, 1:2000, 1:5000, 1:10000
Scale Designation: The standard specifies that each scale should be clearly designated using the term “SCALE” followed by the ratio (e.g., SCALE 1:1, SCALE 2:1, SCALE 1:10). If the context is clear, the word “SCALE” may be omitted.
Definitions:
- Scale: The ratio between the length of an element in the drawing and its real-world counterpart.
- Full size: Ratio 1:1, where the drawing matches the actual size.
- Enlargement scale: Ratio greater than 1:1.
- Reduction scale: Ratio less than 1:1.
Inscription Guidelines: The main scale used should be inscribed in the title block of the drawing, while additional scales for detail views should be indicated next to the relevant part or reference.
Clarity and Interpretation: The chosen scale should allow for clear and easy interpretation of all relevant information. If necessary, detail views can be drawn at larger scales for clarity.
Applications
SIST EN ISO 5455:1998 is widely applied in various engineering fields requiring precise and standardized technical drawings, such as:
- Mechanical Engineering: For component manufacturing, assembly diagrams, and part documentation.
- Civil and Structural Engineering: For architectural plans, site layouts, and infrastructure documentation.
- Electrical and Process Engineering: Ensuring that circuit diagrams and process layouts are clearly understood by stakeholders.
- Education and Training: As a reference for students and professionals learning technical drawing principles.
The use of standardized scales improves the accuracy and international compatibility of technical drawings, supporting efficient communication between engineers, manufacturers, and clients.
Related Standards
When working with technical drawings and scales, the following related standards provide complementary guidance:
- EN ISO 7200: Technical product documentation - Data fields in title blocks and document headers
- EN ISO 128 series: General principles of presentation in technical drawings
- ISO 129: Technical drawings - Indication of dimensions and tolerances
- ISO 5456 series: Projection methods in technical drawings
Conclusion
Adhering to SIST EN ISO 5455:1998 ensures the correct and uniform use of scales in technical drawings, helps prevent misunderstandings, and promotes international collaboration across engineering disciplines. Implementing this standard is essential for anyone involved in the creation, interpretation, or management of technical documentation.
Frequently Asked Questions
SIST EN ISO 5455:1998 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Technical drawings - Scales (ISO 5455:1979)". This standard covers: Indicates recommended scales and their designation for use in any field of engineering. Gives definitions for the scale types and relevant terms. The complete designation shall consists of the word "SCALE" (or its equivalent in the language used in the drawing) followed by the indication of its ratio.
Indicates recommended scales and their designation for use in any field of engineering. Gives definitions for the scale types and relevant terms. The complete designation shall consists of the word "SCALE" (or its equivalent in the language used in the drawing) followed by the indication of its ratio.
SIST EN ISO 5455:1998 is classified under the following ICS (International Classification for Standards) categories: 01.100.01 - Technical drawings in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 5455:1998 has the following relationships with other standards: It is inter standard links to SIST EN IEC 60512-27-200:2022, SIST EN 61076-3-117:2009, SIST EN 61935-1:2010, SIST EN 60603-7-7:2010, SIST EN 82045-2:2006, SIST EN 61935-2-20:2010, SIST EN IEC 60512-28-100:2025, SIST EN 60603-7-4:2010, SIST EN 60603-7-41:2010, SIST EN 60603-7-71:2010, SIST EN 61076-3-114:2009, SIST EN 61082-1:2006, SIST EN 61784-5-6:2012, SIST EN 61158-2:2015, SIST EN IEC 61076-3-123:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 5455:1998 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-1998
7HKQLþQHULVEH0HULOD
Technical drawings - Scales (ISO 5455:1979)
Technische Zeichnungen - Maßstäbe (ISO 5455:1979)
Dessins techniques - Echelles (ISO 5455:1979)
Ta slovenski standard je istoveten z: EN ISO 5455:1994
ICS:
01.100.01 7HKQLþQRULVDQMHQDVSORãQR Technical drawings in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL STANDARD
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME~YHAPOCJHAR OPI-AHM3AL&lR l-i0 CTAH~APTL13A~Wl.ORGANISATlON INTERNATIONALE DE NORMALISATION
Technical drawings - Scales
Dessins techniques - lkhelles
First edition - 1979-02-15
UDC 744.4
Ref. No. ISO 5455-1979 (E)
: scale (ratio), designation, engineering drawings.
Descriptors
Price based on 1 page
FOREWORD
ISO (the International Organization for Standardization) is a worldwide federation
of national Standards institutes (ISO member bodies). The work of developing
International Standards is carried out through ISO technical committees. Every
member body interested in a subject for which a technical committee has been set
up 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.
Draft International Standards adopted by the technical committees are circulated
to the member bodies for approval before their acceptance as International
Standards by the ISO Council.
International Standard ISO 5455 was developed by Technical Committee
lSO/TC IO, Technical drawings, and was circulated to the member bodies in
May 1977.
lt has been approved by the member bodies of the foilowing countries L
Australia Germany, R. F. Philippines
Austria Hungary Romania
Belgium India South Africa, Rep. of
Brazil I reland Spain
Bulgaria Italy Swtizerland
Canada Japan Turkey
Chile Mexico United Kingdom
Denmark Netherlands U.S.A.
Finland New Zealand U.S.S. R.
France Norway
Yugoslavia
The member bod ies of the following countries expressed disapproval of the
document on technical grounds
Czechoslovakia
Poland
Sweden
@J International Organkation for Standardkation, 1979 l
Printed in Switzeriand
INTERNATIIONAL STANDARD
ISO 5455-1979 (E)
Technical drawings - Scales
1 SCOPE AND FIELD OF APPLICATION
5 SCALES
5.1 The recommended scales for use on technical drawings
This International Standard specifies recommended scales
an
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